TY - CHAP A1 - Hartmann, Jürgen ED - Ripple, Dean C. T1 - Comparison of the New NPL Primary Standard Ag Fixed-Point Blackbody Source with the Primary Standard Fixed T2 - Temperature: Its measurement and control in science and industry, volume 7 N2 - Above the freezing point of silver (96178 C), the International Temperature Scale of 1990 is defined in terms of Planck's radiation law. The scale is maintained and disseminated using a validated and linear pyrometer in conjunction with a blackbody reference source at either the Ag, Au (1064.18 C) or Cu (1084.62 C) freezing point. In order to realize the scale with the highest precision high quality, well-characterised, reproducible fixed-point blackbody sources are required. Such sources have been maintained at NPL for a number of years, but it was felt that improvements to the design would be beneficial. A new Agpoint blackbody source has therefore been constructed. The new design will improve the quality and reproducibility of the melting and freezing plateaux and reduce errors due to the “out-of-focus” size-of-source effect which is difficult to measure and to eliminate. Full details of the design of the new source … Y1 - 2003 UR - https://www.researchgate.net/profile/Graham_Machin/publication/252572390_Comparison_of_the_New_NPL_Primary_Standard_Ag_Fixed-Point_Blackbody_Source_with_the_Primary_Standard_Fixed_Point_of_PTB/links/00b4952efb53eca21d000000/Comparison-of-the-New-NPL-Primary-Standard-Ag-Fixed-Point-Blackbody-Source-with-the-Primary-Standard-Fixed-Point-of-PTB.pdf SN - 0-7354-0153-5 PB - American Institute of Physics ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Thermal diffusivity measurements on two-layered and three-layered systems with the laser-flash method JF - High Temperatures – High Pressures N2 - A research effort is reported in which the thermal diffusivity of coatings on substrate materials has been determined. The measurements were performed with a conventional laser-flash apparatus with rear-side detection of the temperature response with an infrared detector. In the evaluation of the data the theoretica! curve is fitted to the complete recorded temperature–time curve, instead of just using the t1/2 point. It is also demonstrated how to include the influence of a thermal contact resistance between the two layers in the evaluation. The paper presents measurements on two-layered and three-layered heat-barrier systems consisting of ZrO, and Ni CrA| Y on nickel. Y1 - 1993 UR - https://www.researchgate.net/profile/Juergen_Hartmann3/publication/260087738_Thermal_Diffusivity_Measurements_on_Two-Layered_and_Three-Layered_Systems_with_the_Laser-Flash_Method/links/57f60d7d08ae8da3ce568cac/Thermal-Diffusivity-Measurements-on-Two-Layered-and-Three-Layered-Systems-with-the-Laser-Flash-Method.pdf VL - 25 SP - 231 EP - 238 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Völker, S. T1 - Thermisches Management an Lichtquellen BT - Licht 2010 N2 - Hauptaufgabe von Lichtquellen ist die Beleuchtung, also die Erzeugung von sichtbarer Strahlung und somit Licht. Allerdings entsteht bei der Erzeugung von Licht auch unerwünschte Wärme, die effizient abgeleitet werden muss. Bei klassischen thermische Lichtquellen wird Licht über die elektrische Heizung von Wolframdrähten bis zu Temperaturen von 3000 K erzeugt. Auch bei dieser Temperatur liegt der überwiegende Teil der emittierten Strahlung im unsichtbaren infraroten Bereich des optischen Spektrums. Entladungslampen erzeugen Licht auf nichtthermischem Wege. Da aber auch hier die Elektroden auf Temperaturen über 2000 K erhitzt werden, leiden Entladungslampen ebenfalls unter thermischer Belastung. In modernen Festkörperlichtquellen wie LEDs, gleichsam nichtthermische Lichtquellen, erzeugt der elektrische Strom eine Joulesche Erwärmung des Bauteils, dessen Temperatur für optimalen Betrieb üblicherweise unter 420 K bleiben sollte. Solche, im Vergleich zu den anderen Lichtquellen niedrigen Temperaturen, verhindern eine effiziente Strahlungskühlung, so dass eine Kühlung durch Konvektion oder Leitung erfolgen muss. Alle genannten Lichtquellen erfordern ein optimales Thermisches Management, dh die Einstellung und Einhaltung einer optimalen Betriebstemperatur, für optimale Effizienz und Lebensdauer. In diesem Beitrag werden die genannten Generationsmechanismen für Licht sowie die Untersuchung der thermischen Belastung der unterschiedlichen Lichtquellen beschrieben und mögliche Optimierungswege diskutiert. Einige Beispiele verdeutlichen die Relevanz des Thermischen Managements für die … Y1 - 2010 UR - https://www.researchgate.net/profile/Juergen_Hartmann3/publication/344629218_Thermisches_Management_an_Lichtquellen/links/5f8584e1a6fdccfd7b5cd56b/Thermisches-Management-an-Lichtquellen.pdf CY - Wien ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Anhalt, Klaus A1 - Gutschwager, B. A1 - Monte, C. A1 - Hollandt, Jörg T1 - Radiation thermometry, thermodynamic temperature and emissivity measurements at the PTB BT - an overview N2 - To meet the increasing demand of calibrations in the field of radiation thermometry, the Physikalisch-Technische Bundesanstalt (PTB) operates two different setups for calibrations covering the temperature range from-60 C up to 3000 C. The first setup consists of several heat-pipe blackbodies in conjunction with platinum resistance thermometers, calibrated according to the International Temperature Scale of 1990 (ITS-90) and is applied for calibrations in the temperature range from-60 C to 961.78 C. In the temperature range from 962 C to 3000 C the calibration is based on high temperature blackbodies. The temperature of these blackbodies is determined in two independent ways: traceable to the ITS-90 gold fixed point or via absolutely calibrated filter radiometers (FR) traceable to the detector primary standard, the cryogenic radiometer. Taking advantage from the high accuracy of the FR calibration, these FRs have also been successfully used for the investigation of the thermodynamic accuracy of the ITS-90 in the range from 419 C to 962 C. For non-contact temperature measurements, the emissivity of the observed object is one of the most important parameters. Therefore, PTB has set up instrumentations for measuring the directional spectral and total emissivity of samples in air from 80 C up to 400 C over a spectral range from 4 µm to 40 µm and under vacuum from 0 C to 600 C and in the spectral range from 1 µm to 1000 µm. Y1 - 2009 UR - http://www.cenam.mx/dme/pdf/EXT_A-Vie-1.pdf PB - Encuentro Nacional de Metrología Eléctrica 2009 CY - Queretaro (Mexico) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Berührungslose Temperaturmessung an Verbrennungsgasen bei hohen Temperaturen und hohen Drücken T2 - 20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019 N2 - Stationäre Gasturbinen sind von großer Bedeutung für die heutige Energieversorgung. Der Wirkungsgrad einer Gasturbine steigt mit zunehmender Heißgastemperatur an. Turbinenhersteller bzw. Kraftwerksbetreiber sind daher bestrebt, Turbinen bei der höchsten materialtechnisch möglichen Heißgastemperatur einzusetzen. Eine entsprechende Prozessoptimierung des Turbinenbetriebs setzt somit die exakte Kenntnis der Gastemperaturen während des Betriebs und damit eine verlässliche Messung derselben voraus. Zur Messung der Gastemperatur werden derzeit in der Regel Thermoelemente unmittelbar im Abgasstrom platziert. Aufgrund der dort vorherrschenden extremen Bedingungen degradieren diese Sensoren allerdings sehr schnell. Ein alternativer Ansatz sieht die Entwicklung eines berührungslosen Messverfahrens auf der Grundlage von Strahlungsthermometern vor. Für die Umsetzung dieses Vorhabens ist die genaue Kenntnis des Verhaltens der infrarot-optischen Emissions- und Transmissionsspektren der im Abgasstrom enthaltenen Gase bei hohen Temperaturen und Drücken eine wesentliche Voraussetzung. Aus diesem Grund wurde am ZAE Bayern eine Hochtemperatur-Hochdruck-Gaszelle entwickelt, die es in Verbindung mit einem FTIR-Spektrometer erlaubt, Gase und Gasgemische hinsichtlich dieser Gesichtspunkte zu charakterisieren. In dieser Arbeit wird die neue Messapparatur vorgestellt und Gasgemische, die für die Turbinenanwendungen relevant sind, werden analysiert. Zur Identifizierung eines geeigneten Wellenlängenbereichs für die geplante berührungslose Temperaturmessung wurden erste Messungen durchgeführt, auf deren Grundlage ein adäquater Wellenlängenbereich ermittelt werden konnte. Y1 - 2019 UR - 10.5162/sensoren2019/2.4.2 SN - 978-3-9819376-0-2 SP - 183 EP - 190 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Knopp, Kevin A1 - Zänglein, Marc A1 - Schreiber, Ekkehard A1 - Schmidt, Franz A1 - Brunner, Martin A1 - Müller, Michael T1 - Experimental set-up for dynamic material investigation at high temperatures T2 - Sensors and Measuring Systems; 19th ITG/GMA-Symposium N2 - Energy efficiency and operation safety in energy conversion, process technology, and aerospace engineering requires advanced material investigation, in particular at high temperatures to characterize the materials and components. Additionally, modern additive manufacturing methods, in particular the 3D metal laser printer requires a detailed control of the melting temperature. Many applications are based on a layered structures, e.g. thermal barrier coatings in gas turbines. Also components manufactured by additive manufacturing pose a layered structure. In these structures the mechanical contact between the layers and to the substrate is of high interest. Besides, the complete characterisation of the additive manufactured component is important for its later application. To cope with these new demands, the University of Applied Sciences Wuerzburg - Schweinfurt (FHWS) and the Bavarian Center for Applied … Y1 - 2018 UR - https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8436229 SN - 978-3-8007-4683-5 SP - 516 EP - 519 PB - VDE Verlag ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Entwicklung und Test eines langwelligen Strahlungsthermometers zur berührungslosen Temperaturmessung in Gasturbinen während des Betriebs JF - tm - Technisches Messen N2 - The aim of this work was the development of a long wavelength infrared radiation thermometer for the non-contact measurement of surface temperatures in stationary gas turbines during operation within the EU-project „Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines (acronym STARGATE)“. In this work, the infrared-optical properties of the thermal barrier coatings and the combustion gases were determined at ZAE Bayern at high temperatures up to 1600 K and pressures up to 13 bar. Based on these experimental characterizations, a suitable spectral range could be identified which lies around 10 μm for the long-wavelength infrared radiation thermometer. According to these findings, a laboratory setup with suitable optical components (filters, IR-fibers, etc.) was firstly realized and verified. Subsequently, a prototype for measurements in gas turbines during operation of the turbines has … N2 - Das Ziel dieser Arbeit bestand in der Entwicklung eines langwelligen Strahlungsthermometers zur berührungslosen Messung von Oberflächentemperaturen in stationären Gasturbinen während des Betriebs der Turbinen innerhalb des EU-geförderten Projektes „Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines (Acronym STARGATE)“. Im Rahmen der Arbeit wurden die infrarot-optischen Eigenschaften der Wärmedämmschichten und der vorhandenen Brenngase am ZAE Bayern bei hohen Temperaturen bis 1600 K und Drücken bis 13 bar bestimmt. Mit Hilfe dieser experimentellen Charakterisierungen konnte ein geeigneter Spektralbereich um 10 μm für das langwellige Strahlungsthermometer identifiziert werden. Entsprechend dieser Erkenntnisse wurde zunächst ein Laboraufbau mit geeigneten optischen Bauteilen (Filter, IR-Wellenleiter, etc.) realisiert und verifiziert. Anschließend wurde ein Prototyp für Messungen in Gasturbinen während des Betriebs der Turbinen entwickelt und in einem Turbinenteststand der Firma Siemens AG in Berlin erfolgreich getestet. Abschließend wurde eine Unsicherheitsanalyse durchgeführt, die eine erweiterte Messunsicherheit der gemessenen Temperaturen von etwa ± 30 K ergab. T2 - Development and test of a long wavelength infrared radiation thermometer for non-contact temperature measurements in gas turbines during operation KW - Berührungslose Temperaturmessung KW - Strahlungsthermometrie KW - Wärmedämmschicht KW - Gasturbine KW - Emissionsgrad KW - Infrarot-Strahlung KW - Non-contact temperature measurement KW - radiation thermometry KW - thermal barrier coating KW - gas turbine KW - emissivity KW - infrared radiation Y1 - 2017 U6 - https://doi.org/https://doi.org/10.1515/teme-2017-0077 VL - 85 IS - 1 SP - 28 EP - 39 PB - Oldenbourg Wissenschaftsverlag CY - Berlin/Boston ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Eutektische Hochtemperatur-Fixpunkte für die Dynamische Differenzkalorimetrie N2 - Eutektische Metall-Kohlenstoff-(M-C)-Fixpunkte erweitern den Temperaturbereich in dem Hochtemperaturfixpunkte eingesetzt werden können vom höchsten Temperaturfixpunkt der derzeit gültigen Internationalen Temperaturskala von 1990 (ITS-90) der Erstarrungstemperatur von Kupfer bei 1357.77 K bis hin zu Temperaturen von bis zu 3500 K. Bislang sind diese Hochtemperaturfixpunkte ausschließlich eingesetzt worden, um die Kalibrierung von Strahlungsthermometern und Thermoelementen zu vereinfachen. Herkömmlicherweise ist das Fixpunktmaterial dabei in einem Graphittiegel, in den ein Hohlraumzylinder eintaucht, gefasst. Der Hohlraumzylinder dient dabei als Schwarzkörper für ein Strahlungsthermometer und als Tauchrohr für Anwendungen in der Berührungsthermometrie. Oberhalb von 1300 K würde auch die Messung thermophysikalischer Eigenschaften, d.h. Methoden der thermischen Analyse wie die dynamische Differenzkalorimetrie (DSC), die Laserflash-Methode oder die Dilatometrie, signifikant von der in-situ Anwendung der eutektischen Metallkohlenstoff-Fixpunkte profitieren. Der Beitrag präsentiert die Entwicklung und Untersuchung von Metallkohlenstoff-Hochtemperaturfixpunkten für die Anwendung in DSC Messapparaturen im Temperaturbereich bis 2300 K. Im Gegensatz zu der etablierten Anwendung in Strahlungsthemometrie und Berührungsthemometrie sind die Materialmengen, die für eine Temperaturkalibrierung benötigt werden, in der thermischen Analyse mit einigen Milligramm Fixpunktmaterial sehr gering. Spezielle Verfahren wurden dabei für die effektive Präparation solch kleiner, und für den Einsatz als Temperaturfixpunkt hochreiner, Probenmassen entwickelt. Y1 - 2010 PB - Sensoren und Messsysteme 2010 - 15. ITG/GMA-Fachtagung ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Optische Hochtemperaturmesstechnik für die Thermometrie, Radiometrie und Photometrie N2 - Die Temperaturmessung über die emittierte Wärmestrahlung ist seit über hundert Jahren ein innovatives Feld der Messtechnik und der Grundlagenphysik. Ein erster Höhepunkt war Gustav Kirchhoffs theoretisches Prinzip eines Schwarzen Körpers mit idealen - von Material und Form unabhängigen - Emissionseigenschaften für Wärmestrahlung. Diese frühen Entwicklungen gipfelten in Max Planck’s berühmtem Strahlungsgesetz, das die Emission von Wärmestrahlung exakt beschreibt und den Beginn der modernen Quantenphysik einleitet. Die quantitative Messung von Wärmestrahlung erfordert die Kenntnis von Quellen- und Detektoreigenschaften. Im Bereich der Erzeugung von Wärmestrahlung werden noch heute die gleichen Prinzipien benutzt wie zu Zeiten Plancks, d. h. es werden technologisch weiter entwickelte Hohlraumstrahler zur Realisierung Schwarzer Körper eingesetzt. Im Bereich der Detektion von Wärmestrahlung haben sich jedoch durch die Entwicklung der Halbleitertechnik grundsätzlich andere physikalische Prinzipien durchgesetzt. Während zu Plancks Zeiten thermische Empfänger eingesetzt wurden, finden im Hochtemperaturbereich heute - neben thermischen Empfängern - fast ausschließlich photoelektrische Empfänger Anwendung. Einen weiteren entscheidenden Schritt in Richtung höchster Genauigkeit bedeutete die Entwicklung eines elektrischen Substitutionsradiometers bei sehr tiefen Temperaturen, des so genannten Kryoradiometers. Die Erfindung des Kryoradiometers als primärer Detektorstandard Ende der 1970er Jahre ermöglichte die Messung optischer Strahlungsleistung mit einer relativen Unsicherheit von unter 10-4. Basierend auf diese Strahlungsleistungsmessung ist heute die Kalibrierung der spektrale Empfindlichkeit von Detektoren mit relativen Unsicherheiten bis zu 10-4 möglich. Moderne Halbleiterempfänger liefern einen strahlungsleistungsproportionalen Photostrom. Zur Messung der Wärmestrahlung über einen weiten Temperatur- und Wellenlängenbereich müssen Photoströme von fA bis mA mit kleinster Unsicherheit bestimmt werden. Das stellt hohe experimentelle Anforderungen an die elektrische, geometrische und optische Messtechnik. Der Beitrag beschreibt kurz die historische Entwicklung der optischen Temperaturmessung über die ausgesandte Wärmestrahlung und geht dann auf die experimentellen und physikalischen Grundlagen dieser Methode ein. Abschließend werden Möglichkeiten zur Implementierung der im Metrologielabor erreichbaren niedrigen Messunsicherheiten in den praktischen messtechnischen Alltag vorgestellt. Y1 - 2010 PB - Sensoren und Messsysteme 2010 - 15. ITG/GMA-Fachtagung ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Progress with the development of high temperature fixed-points in the EU through the Himert project N2 - The EU FP5 funded research project HIMERT (Novel High temperature Metal-carbon Eutectic fixed points for Radiation Thermometry, Radiometry and Thermocouples) aims to develop high temperature fixed points above the freezing point of copper to approximately 2500 deg C with a repeatability of less than 0.1 deg C. NPL and BNM-INM have constructed fixed-point blackbody sources, while BNM-LNE has constructed cells up to 1950 deg C (Ru-C) for the calibration of contact sensors. PTB will perform absolute radiometry of the cells constructed by NPL and BNM-INM. Pt-Pd thermocouple studies will be undertaken by PTB and BNM-LNE. Also a major materials compatibility study has been undertaken by BNM-LNE to identify thermocouple sheath materials that are compatible with graphite to 1950 deg C. The University of Valladolid is investigating the background physics of the eutectic process and seeking to develop physically realistic models. The two industrial companies will test whether improved traceability at lower uncertainties can be achieved by using metal-carbon eutectics. This paper describes the HIMERT project and current progress. (authors) Y1 - 2003 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - A novel lens free high-accuracy InGaAs radiation thermometer for radiation temperatures above 300°C JF - VDI Berichte (1784) N2 - A novel high-accuracy radiation thermometer designed for laboratory applications and based on an InGaAs photon detector is presented. In contrast to other radiation thermometers, no imaging optics is used for collecting the radiation. By using a set of two equally sized optical apertures at fixed distances from the detector and a short distance of the thermometer from the radiation source, the size-of-source effect of the instrument is minimized. The radiation thermometer is designed for temperature measurements from 300°C upwards. Technical details of the radiation thermometer together with the measured reference function according to the ITS-90 up to 962°C and its temporal stability are presented. The size-of-source effect of the novel lens-free radiation thermometer is compared with the lens-based InGaAs reference radiation thermometer of the Physikalisch-Technische Bundesanstalt. Y1 - 2003 SP - 155 EP - 162 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - The composition analysis of YBa2Cu3O7-δ or PrBa2Cu3O7-δ thin films and (YBa2Cu3O7-δ/PrBa2Cu3O7-δ) n heterostructures prepared by CVD JF - Fresenius' journal of analytical chemistry N2 - Some YBa2Cu3O7-δ films and heterostructures prepared by Chemical Vapor Deposition (CVD) were analyzed in our laboratories by EPMA-EDX or WDX, RBS, SNMS and AES. It was found that in some cases the results of composition analysis can significantly deviate from each other. At least two main reasons for these deviations exist: the different lateral resolution and the application of different reference samples for the calibration. Y1 - 1997 UR - https://link.springer.com/article/10.1007/s002160050305 VL - 357 IS - 8 SP - 1061 EP - 1065 ER - TY - RPRT A1 - Hartmann, Jürgen T1 - Improvement of the active layers of a field effect sensor for fluorine N2 - The quantitative determination of fluorine in gases is of great importance as this gas is often used in various industrial processes, but is toxic even at low concentrations. Therefore, there is a great demand for sensors for this gases and alarm systems controlling the environment. Recently, the auhtors reported on first results with a new field effect sensor for the determination of F {sub 2}. A silicon substrate was used with a thin layer of LaF {sub 3} in direct contact to the semiconductor and platinum electrode on the top. In early results, a good sensitivity was achieved but an insufficient stability and limit of detection required further improvements. The corresponding findings and fundamental investigations on the sensor mechanism will be given in this paper. Y1 - 1996 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Thermal resistance of thermal barriers in polycrystalline diamond JF - Progress in Natural Science N2 - Micrometer resolved photoțhermal measurements on chemical vapour deposited (CVD) diamond are presented. It is shown that the thermal conductivity inside the grains is as high as that of natural IIa diamond. Using two different approaches we measure the thermal resistance of thermal barriers like grain boundaries or microcracks and obtain values of the order of 10" m'Kw. A simple model is presented, relating the overall thermal conductivity for one-dimensional heat flow to the thermal resistance at barriers and the average size of the grains. Good agreernent between predictions and literature data is found, ... Y1 - 1996 IS - 6 SP - 297 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Development and test of a long wavelength infrared radiation thermometer for non-contact temperature measurements in gas turbines during operation JF - Technisches Messen N2 - The aim of this work was the development of a long wavelength infrared radiation thermometer for the non-contact measurement of surface temperatures in stationary gas turbines during operation within the EU-project, Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines (acronym STARGATE)". In this work, the infrared-optical properties of the thermal barrier coatings and the combustion gases were determined at ZAE Bayern at high temperatures up to 1600 K and pressures up to 13 bar. Based on these experimental characterizations, a suitable spectral range could be identified which lies around 10 mu m for the long-wavelength infrared radiation thermometer. According to these findings, a laboratory setup with suitable optical components (filters, IR-fibers, etc.) was firstly realized and verified. Subsequently, a prototype for measurements in gas turbines during operation of the turbines has … Y1 - 2018 VL - 85 IS - 1 SP - 28 EP - 39 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Strahlungsthermometrie BT - Temperaturen berührungslos messen JF - PTB-Mitteilungen 117 N2 - Der prinzipielle Aufbau eines Strahlungsthermometers ist in Bild 2 dargestellt. Eine Optik bildet das Messobjekt mittels der Wärmestrahlung auf die Gesichtsfeldblende vor dem Detektor ab. Die Aperturblende und die Gesichtsfeldblende definieren den Raumwinkel und die Fläche (Messfeld) der vom Detektor nachgewiesenen Strahlung. Bei den meisten Strahlungsthermometern wird ein Spektralfilter zur Eingrenzung des Wellenlängenbereiches der auf den Detektor treffenden Strahlung verwendet. Dieser Spektralfilter wird oft unmittelbar vor dem Detektor angeordnet oder ist als Fenster in das Detektorgehäuse integriert. Bei hochwertigen Strahlungsthermometern wird der Detektor und manchmal auch zusätzlich der Spektralfilter temperiert. Interne Referenzstrahlungsquellen oder nur die Messung und Verarbeitung der internen Temperatur des Detektors oder der optischen Komponenten sorgen im allgemeinen für eine stabile Anzeige von Messwerten der Strahlungstemperatur innerhalb eines weiten Eigentemperaturbereichs des Strahlungsthermometers. Die Leistungsfähigkeit eines Strahlungsthermometers wird wesentlich von der Güte seiner Optik und der Empfindlichkeit seines Strahlungsempfängers bestimmt. Hochwertige Strahlungsthermometer arbeiten mit einem festen Fokus, der dem empfohlenen Messabstand entspricht, oder mit variablem Fokus zur Anpassung an den Messabstand. Aus der abstandsabhängigen Einstellung des Fokus resultiert ein Messfeld, in dem die mittlere Strahlungstemperatur des Messobjektes ermittelt wird. Genaue Messungen der Strahlungstemperatur sollten mit abbildenden optischen Systemen erfolgen … Y1 - 2007 UR - http://www.relativity.li/uploads/pdf/weitere/PTB_2007_Heft_3.pdf#page=53 VL - 117 IS - 3 SP - 272 EP - 281 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Hollandt, Jörg A1 - Schreiber, Ekkehard A1 - Yamada, Y. T1 - Improved thermal stability of the linear pyrometer LP3 for high temperature measurements within the EU-project Himert JF - VDI Bericht 1784 Y1 - 2003 SP - 135 EP - 141 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Realisation and dissemination of thermodynamic temperature above 1234.93 K JF - CCT Working Documents Y1 - 2010 UR - https://www.bipm.org/cc/CCT/Allowed/25/D12r_MeP-HT_v8.pdf ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Infrared-optical characterization of emitting and absorbing gases at high temperatures and high pressures JF - High Temperatures – High Pressures N2 - In the context of the optimization of stationary gas turbines, the surface temperatures of the turbine blades have to be measured by a non-contact technique using radiation thermometers during operation of the turbine. Nowadays turbine blades are protected by thermal barrier coatings. The infrared-optical properties of these coatings require the usage of the MIR or LWIR region for non-contact measurement of the surface temperatures. For performing such measurements and for properly analyzing the derived data, the transmission and absorption spectra of the combustion gas mixture within the turbine were determined at the local conditions during operation of the turbine. Therefore, subject of this work is the measurement of the transmission spectra of carbon dioxide and water vapor at high temperatures and high pressures to identify a wavelength range, which is almost free of absorption and emission effects. In … Y1 - 2018 VL - 47 IS - 1 SP - 3 EP - 21 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - A study on the feasibility of measuring the emissivity with the laser-flash method JF - International Journal of Thermophysics N2 - The laser-flash method is a fast, widely used and well established technique to measure the thermal diffusivity. Since its introduction in the 1960s, it was proposed to expand this technique to the measurement of heat capacity and emissivity. Currently, the measurement of spectral emissivity at high temperatures is connected with relatively large uncertainties, although the spectral emissivity is an essential parameter for applications, e.g., in the lamp industry and fusion research. In this work, a theoretical study is presented on the possibility of emissivity measurements using the laser-flash method. Two mathematical approaches are discussed which solve the problem, that a measured temperature rise—necessary to calculate the emissivity—itself depends on the emissivity. It is shown that both methods have a negligible arithmetic error, making them applicable to be used in future work. Y1 - 2010 UR - https://link.springer.com/content/pdf/10.1007/s10765-010-0767-z.pdf VL - 31 IS - 4-5 SP - 998 EP - 1010 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - A comparison of the blackbody cavities for infrared ear thermometers of NMIJ, NPL, and PTB JF - AIST Bulletin of Metrology N2 - A comparison of the NMIJ, the NPL, and the PTB blackbody cavities for infrared ear thermometers has been performed for the first time. The NMIJ and the PTB have transported their standard blackbodies to the NPL and radiance temperatures of the blackbodies of the institutes have been directly compared simultaneously using high-resolution infrared ear thermometers as comparators. The results of the comparison show that radiance temperatures realized by the NMIJ, the NPL, and the PTB cavities agree within +/-0.01 deg C, well within their uncertainty levels of around 0.04 deg C in the temperature range from 35 deg C to 42 deg C. Y1 - 2007 VL - 5 IS - 4 SP - 251 EP - 256 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Traceable Radiometric Calibration of Semiconductor Detectors and their Application for Thermodynamic Temperature Measurement JF - Journal of Metrology Society of India N2 - The non-contact measurement of temperature by using the emitted thermal radiation has been an innovative field of measurement science and fundamental physics for more than a hundred years. It saw the first highlight in Gustav Kirchhoff’s principle of a blackbody with ideal emission characteristics and culminated in Max Planck’s formulation of the law of thermal radiation, the so-called Planck’s law, forming the foundation of quantum physics. A boost in accuracy was the development of semiconductor detectors and the cryogenic electrical substitution radiometer in the late 1970s. Semiconductor detectors, namely photodiodes, deliver an electrical current proportional to the absorbed optical radiation. Due to the measurements of thermal radiation over a wide range of temperature and wavelength, thermodynamic temperature measurements with radiometric methods have set benchmarks to all, the … Y1 - 2010 UR - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.452.930&rep=rep1&type=pdf VL - 25 IS - 1 SP - 3 EP - 10 ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Thermal characterisation of diamond T2 - Properties, Growth and Applications of Diamond N2 - Thermal characterisation of diamond is one of the key issues in assessing material quality since thermal parameters are strongly related to other features like isotopic constitution, defect content and microstructure (see Datareview A 1.5). Hence, the macroscopic thermal conductivity can often be taken as a figure-of-merit for diamond quality relevant for industrial applications. Determining thermal conductivity of diamond materials does not require, in principle, techniques other than those used for thermal assessment of more common materials and the standard methods as well as their application to diamond have been described in detail in rather complete review articles [1, 2]. Recent advancements in methodology have mainly been focused on thermal microscopy for measuring conductivity in extremely small volumes and finally single grains of polycrystalline material [3] and to quantitatively determine resistances across thermal barriers related to grain boundaries in thin films [4]. In this survey we summarise the main features of the standard techniques and briefly review the technology of quantitative thermal microscopy. It is difficult to precisely control and measure heat flow and radiation and, hence, thermal measurements generally yield only a rather limited precision; this fully applies also to measurements on diamond materials. An accuracy of a few per cent has to be regarded as excellent while the precision of most measurements is at a 5 to 10% level or below. As demonstrated by a recent round robin test [5], this especially applies to the characterisation of polycrystalline thin films where measurements may be strongly affected by the … Y1 - 2001 PB - Institute of Engineering & Technology ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - Photothermische Mikroskopie BT - Berührungslose Temperaturmessung mit höchster räumlicher Auflösung Y1 - 1998 SP - 221 EP - 226 PB - VDI-Bericht 1379 ER - TY - JOUR A1 - Hartmann, Jürgen T1 - Condensed matter: structural, mechanical, and thermal properties BT - local variation of room-temperature thermal conductivity in high-quality polycrystalline diamond JF - Applied Physics Letters Y1 - 1998 VL - 73 IS - 6 SP - 756 EP - 758 ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Improvement of the active layers of a MIS-structure semiconductor gas sensor for HF and F Y1 - 1995 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Arduini, Mariacarla T1 - A Novel Approach for Non-Destructive Testing of the Adhesion of Thermal Barrier Coatings N2 - The operation temperatures of gas turbine engines have been increased significantly to optimize their efficiency factor. To protect the metallic blades from these high temperatures, thermal barrier coatings (TBCs) are applied onto the turbine blades. These layers must have a good adhesion to the supporting turbine blade. A poor adhesion may lead to a delamination of the layer during operation and finally to a destruction of the turbine blade and eventually the complete turbine. It is therefore necessary, to check the quality of the layer adhesion regularly during service or preferably during operation. Approaches for non-contact and nondestructive techniques by using optical or infrared radiation are not sophisticated up to now. Hence in this paper a new attempt to improve these optical or infrared-optical methods is described. The presented idea relies on the application of different wavelengths for the used measurement system. Using a short wavelength range, where the TBC is semitransparent, allows the measurement of the temperature of the turbine blade. Using a second, long wavelength range where the TBC is non-transparent, the temperature of the surface of the TBC can be determined. As the thermal contact is usually correlated with the mechanical adhesion such measurements can be a possible tool for nondestructively testing the adhesion of TBCs. Y1 - 2016 UR - https://www.researchgate.net/profile/Juergen_Hartmann3/publication/309291712_A_Novel_Approach_for_Non-Destructive_Testing_of_the_Adhesion_of_Thermal_Barrier_Coatings/links/5ec230b2458515626cb0b295/A-Novel-Approach-for-Non-Destructive-Testing-of-the-Adhesion-of-Thermal-Barrier-Coatings.pdf SP - 12 EP - 13 PB - The Future of Gas Turbine Technology ; 8 th International Gas Turbine Conference CY - Brüssel (Belgien) ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark A1 - Hodge, D. T1 - Long wavelength infrared radiation thermometry for non-contact temperature measurements in gas turbines JF - Infrared Physics & Technology N2 - The objective of the EU project “Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines (acronym STARGATE)” is the development of a suite of advanced sensors, instrumentation and related systems in order to contribute to the developing of the next generation of green and efficient gas turbine engines. One work package of the project deals with the design and development of a long wavelength infrared (LWIR) radiation thermometer for the non-contact measurement of the surface temperature of thermal barrier coatings (TBCs) during the operation of gas turbine engines. For opaque surfaces (e.g. metals or superalloys) radiation thermometers which are sensitive in the near or short wavelength infrared are used as state-of-the-art method for non-contact temperature measurements. But this is not suitable for oxide ceramic based TBCs (e.g. partially yttria stabilized zirconia) as oxide ceramics … Y1 - 2017 UR - https://www.sciencedirect.com/science/article/pii/S1350449516303395 IS - 80 SP - 120 EP - 130 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Ochs, Dennis A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Schmidt, Franz A1 - Brunner, Martin T1 - Optische Sensorik für die additive Fertigung T2 - Sensoren und Messsysteme 2019 Y1 - 2019 CY - Nürnberg ER - TY - GEN A1 - Hartmann, Jürgen A1 - Fischer, J. A1 - Seidel, J. T1 - Improved accuracy in measurement of radiometric apertures with a non-contact technique BT - Newrad’99 (Poster) Y1 - 1999 CY - Madrid (Spanien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus T1 - Radiometric measurements of eutectic fixed-point cells at PTB BT - SICE Annual Conference 2005 Y1 - 2005 CY - Okayama (Japan) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Fischer, J. T1 - Calibration facility for infrared thermography systems at PTB T2 - Sensor 2001 Proceedings N2 - Section 2 of the present paper introduces the two calibration facilities, presents the applied blackbody radiation sources with the achievable uncertainties, the collimator optics, and the climate box. A short introduction of the experimental techniques used and presentation of some experimental results for different camera systems follows in Section 3. A final conclusion is given in Section 4. Y1 - 2001 SP - 233 EP - 238 ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Radiometrie im UV und IR BT - future led Seminar „UV-IRED LED Seminar“ Y1 - 2009 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Photometrie und Radiometrie BT - 125 Jahre Lichttechnik an der TU Berlin Y1 - 2007 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Construction, Calibration and Application of a LWIR Pyrometer within the EU Project STARGATE BT - Tempmeko 2016 N2 - The EU project STARGATE (Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines) has the headline objective to develop a suite of advanced sensors, instrumentation and related systems in order to contribute to the development of the next generation of green and efficient gas turbine engines. To increase the efficiency of gas turbines higher combustion temperatures and higher turbine inlet temperatures are required. This implies that turbine blades and vanes are exposed to higher temperatures. Advanced thermal barrier coatings (TBCs) based on ceramic materials protect the components from overheating and ensure mechanical integrity. Still, materials and coatings need to be stressed to their limits to reach the challenging goals of an efficiency increase. Under these circumstances, it is crucial to have sensing techniques available that are capable of accurately monitoring the temperature of turbine parts in order to prevent damages within the engine. The approach to overcome current limitations of existing techniques is to use long wavelength infrared (LWIR) pyrometry as TBCs are usually semi-transparent in the near or short wavelength infrared. Therefore one work package within the STARGATE project is dedicated to the development of a LWIR radiation thermometer to measure the surface temperature of TBCs contactless during operation of the gas turbine engines. The paper shortly gives an overview of the investigation performed within the STARGATE project. The construction, calibration and application of the LWIR radiation thermometer is described in detail and results obtained on a test facility are presented. The paper closes with an outlook on future plans of implementing the LWIR pyrometer in the quality system of gas turbine operation. Y1 - 2016 UR - https://www.researchgate.net/publication/341432336_CONSTRUCTION_CALIBRATION_AND_APPLICATION_OF_A_LWIR_PYROMETER_WITHIN_THE_EU_PROJECT_STARGATE CY - Zakopane (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Knopp, Kevin A1 - Zänglein, Marc T1 - Hochtemperaturmessung und Materialuntersuchung für Energietechnik und additive Fertigungsverfahren BT - Werkstoffwoche 2017 Y1 - 2017 CY - Dresden ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Sarge, S.M. A1 - Pagel, R. A1 - Schindler, A. A1 - Denner, T. T1 - Eutectic high-temperature fixed-points for improves traceability in DSC/DTA BT - 9. Workshop on subsecond thermophysics Y1 - 2010 CY - Graz ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Keawprasert, T. A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Abd ElMageed, A. A1 - Sperling, A. T1 - Monochromator based absolute calibration of radiation thermometers BT - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Wang, Y. A1 - Yamada, Y. T1 - Large and small aperture Fixed-point cells of Cu, Pt-C, and Re-c BT - Tempmeko 2007 Y1 - 2007 CY - Banf (Kanada) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. T1 - Experimental set-up for dynamic material investigation BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - RPRT A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Fischer, Joachim T1 - Measurements of T-T90 down to Zinc point temperatures with absolute filter radiometry BT - Arbeitsbericht des Konsultativ Commitee für Thermometrie des BIPM, CCT/01-03 Y1 - 2001 CY - Paris (Frankreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Ojanen, M. A1 - Anhalt, Klaus A1 - Weckström, T. A1 - Kärhä, P. A1 - Heinonen, M. A1 - Ikonen, E. T1 - Comparison of the Radiation Temperature Scales between PTB and MIKES T2 - Proceedings of NEWRAD Y1 - 2008 SP - 285 EP - 286 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus T1 - Novel High-temperature fixed-points for radiation thermometry, radiometry and photometry T2 - Proceedings of Sensoren and Messsysteme 2006 Y1 - 2006 SN - 978-3-8007-2939-5 SP - 145 EP - 148 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Schiller, S. A1 - Schreiber, Ekkehard T1 - Practical high-temperature furnace for the application in radiometry, photometry and thermometry T2 - Proceedings of NEWRAD Y1 - 2008 SP - 275 EP - 276 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus T1 - Neuartige Metall-Kohlenstoff-Fixpunkte für die Anwendung in der Strahlungsthermometrie und der Radiometrie T2 - Temperatur 2006 Y1 - 2006 SP - 135 EP - 141 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Werner, L. T1 - Comparison and Evaluation of Different Models for the Interpolation of Spectral Responsivity Data T2 - Proceedings of NEWRAD Y1 - 2008 SP - 309 EP - 310 ER - TY - BOOK A1 - Hartmann, Jürgen T1 - Quantitative Bestimmung lokaler thermischer Eigenschaften in polykristallinem Diamant Y1 - 1996 PB - Köster CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Legal metrology on clinical thermometers in the European Union BT - Seminar der Japan Measuring Instruments Federation Y1 - 2004 CY - Tokyo (Japan) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Krenek, S. A1 - Anhalt, Klaus A1 - Lindemann, A. A1 - Monte, C. A1 - Hollandt, Jörg T1 - A study on the feasibility of measuring the emissivity with the laser-flash method BT - 17. Symposium on thermophysical properties Y1 - 2009 CY - Boulder (USA) ER - TY - GEN A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Zelenjuk, A. A1 - Taubert, Dieter Richard T1 - New PTB Set-up for the absolute calibration of the spectral responsivity of radiation thermometers BT - Tempmeko 2007 (Poster) Y1 - 2007 CY - Banf (Kanada) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Krenek, S. A1 - Anhalt, Klaus A1 - Lindemann, A. A1 - Hollandt, Jörg T1 - Dynamic Emissivity Measurement: First Results BT - 9. Workshop on subsecond thermophysics Y1 - 2010 CY - Graz ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Breuer, J. A1 - Johannsen, U. A1 - Rabus, H. A1 - Werner, L. T1 - PTB detector calibration capabilities for optical radiometry T2 - Sensor 2001 Proceedings N2 - In the first part of this paper we give a brief survey of the approaches taken to achieve these rather challenging goals. Then we will focus on some aspects of transfer detector standards that have to be taken into account if the highest possible accuracy is to be reached. The final section of the paper deals with a new and very promising method for the dissemination of the spectral responsivity of semiconductor photodiodes. Y1 - 2001 SP - 227 EP - 232 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Fischer, Joachim A1 - Hollandt, Jörg T1 - Calibration of thermal cameras for temperature measurements using blackbody radiation in the temperature range –60 °C up to 3000 °C T2 - IRS² 2002 Y1 - 2002 CY - Erfurt ER - TY - GEN A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Machin, Graham A1 - Woolliams, E. A1 - Dury, M. A1 - Yoon, H. T1 - Absolute radiometry of metal-carbon eutectic fixed-points for a new temperature scale BT - Tempmeko 2010 (Poster) Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Monte, C. A1 - Anhalt, Klaus A1 - Gutschwager, B. A1 - Taubert, Dieter Richard A1 - Hollandt, Jörg T1 - Calibration of Radiation Thermometers and Measurement of Spectral Emissivity Traceable non-contact temperature measurements in industrial and scientific applications BT - VDI-Berichte 2011 T2 - Proceedings Sensoren und Messsysteme 2008 Y1 - 2008 SP - 249 EP - 261 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus T1 - Neuartige Hochtemperaturfixpunkte für die Photometrie, die Radiometrie und die Thermometrie BT - Proceedings der Licht 2006 Y1 - 2006 CY - Bern (Schweiz) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Arduini, Mariacarla T1 - An Attempt to Non-Destructively Qualify the Adhesion of Thermal Barrier Coatings BT - Tempmeko 2016 Y1 - 2016 CY - Zakopane (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Gutschwager, B. A1 - Monte, C. A1 - Sperfeld, P. A1 - Taubert, Dieter Richard A1 - Hollandt, Jörg T1 - The PriTeRa facility of PTB for spectral radiance and irradiance calibrations and radiation thermometry in the range from -170 °C up to 3200 °C and from 200 nm up to 50 µm T2 - Proceedings of NEWRAD Y1 - 2008 SP - 231 EP - 232 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Hollandt, Jörg T1 - Nearly as hot as the sun: High-temperature fixed-points for radiation thermometry and radiometry BT - NCSLI Symposium Metrology’s Impact on Products and Services Y1 - 2007 CY - St. Paul (USA) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Schindler, A. A1 - Denner, T. A1 - Sarge, S. A1 - Pagel, R. T1 - Eurtektische Hochtemperatur Fixpunkte für die dynamische Differenzkalorimetrie BT - Sensoren und Messsysteme 2010 Y1 - 2010 CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Krüger, U. A1 - Schmidt, Franz T1 - CCD-camera for measuring temperature and spectral radiance BT - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Knopp, Kevin A1 - Shandy, Amir T1 - Non-contact detection of the adhesive properties of ceramic coatings for high temperature applications using infrared thermography; Transactions BT - Transactions Y1 - 2022 PB - SMiRT-26 CY - Berlin/Potsdam ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Schindler, A. A1 - Moriya, Y. A1 - Sarge, S. A1 - Pagel, R. A1 - Denner, T. T1 - Metal(carbide)-carbon eutectic high-temperature fixed-points for dynamic differential scanning calorimetry BT - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Fischer, Joachim A1 - Hollandt, Jörg T1 - Calibration of thermal cameras for temperature measurements using blackbody radiation in the temperature range -60°C up to 3000 °C BT - AMA Service GmbH T2 - Proceedings of the International Conference Infrared Sensors & Systems Y1 - 2002 SP - 119 EP - 124 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Gutschwager, B. A1 - Hollandt, Jörg T1 - A novel lens-free high-accuracy InGaAs radiation thermometer for radiation temperatures above 300 °C T2 - VDI-Bericht 1784 Y1 - 2003 SP - 155 EP - 162 ER - TY - GEN A1 - Hartmann, Jürgen A1 - Sadli, M. A1 - Anhalt, Klaus A1 - Schiller, S. T1 - Thermal effects in the bb3200pg on m-c eutectic implementation BT - Tempmeko 2007 (Poster) Y1 - 2007 CY - Banf (Kanada) ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Modernste Radiometrie und Photometrie BT - WTT Seminar „Beleuchtung mit LEDs“ Y1 - 2008 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard A1 - Monte, C. A1 - Gutschwager, B. A1 - Baltruschat, C. A1 - Hollandt, Jörg A1 - Kochems, D. A1 - Küchel, C. T1 - The Spectral Photon Flux of the Radiometric Calibration Spectral Source for the NIRSpec Instrument of the James Webb Space Telescope T2 - Proceedings of NEWRAD Y1 - 2008 SP - 79 EP - 80 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Morkel, M. T1 - Emissivity of tungsten electrodes in discharge lamps at elevated temperatures T2 - Proceedings of NEWRAD Y1 - 2008 SP - 273 EP - 274 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - Microscopic heat transfer in high quality polycrystalline diamond BT - EAA Symposium on Molecular and Quantum Acoustics Y1 - 1997 CY - Ustron (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Bünger, L. A1 - Schreiber, Ekkehard A1 - Menz, H.-J. A1 - Neuer, G. T1 - Hochtemperaturstrahler mit großem Öffnungsdurchmesser für die praktische Anwendung in Strahlungsthermometrie und Radiometrie BT - Temperatur 2009 Y1 - 2009 SN - 3-9810021-9-9 SP - 99 EP - 106 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Zipf, Matthias T1 - Non-contact temperature measurement of combustion gases at high temperatures and high pressures BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Khlevnoy, B. A1 - Rougie, B. A1 - Gibson, C. A1 - Yoon, H. A1 - Gärtner, A. A1 - Taubert, Dieter Richard T1 - CCPR-S1 Supplementary Comparison for Spectral Radiance in the range of 220 nm to 2500 nm T2 - Proceedings of NEWRAD Y1 - 2008 SP - 241 EP - 242 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Lowe, D. A1 - Machin, G. A1 - Sadli, M. A1 - Yamada, Y. T1 - Thermodynamic Temperature determination of Co-C, Pd-C, Pt-C, and Ru-C eutectic fixed point cells BT - Newrad 2005 Y1 - 2005 CY - Davos (Schweiz) ER - TY - GEN A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Bünger, L. A1 - Schreiber, Ekkehard T1 - Practical high-temperature furnace for the application on thermometry and radiometry BT - Tempmeko 2010 (Poster) Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Edler, F. A1 - Anhalt, Klaus A1 - Schiller, S. T1 - Novel temperature standards for high-temperature calibration above 1100 °C T2 - Proceedings of Sensor 2005 Y1 - 2005 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - Wärmetransport in Kristalliten von CVD-Diamantschichten BT - Verhandlungen der DPG T2 - Frühjahrstagung der Deutschen Physikalischen Gesellschaft Y1 - 1997 IS - 5 SP - 616 EP - 616 CY - Münster ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Taubert, Dieter Richard T1 - Assessing blackbody emissivity by Monte Carlo Simulation BT - IRS² 2002 Y1 - 2002 CY - Erfurt ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Sakuma, F. A1 - Ma, L. T1 - Intercomparison of radiation temperatures scales between PTB and NMIJ from 1000 °C and 2500 °C T2 - Proceedings of SICE 2002 Y1 - 2002 SP - 111 EP - 115 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Müller, Michael A1 - Ebert, Hans-Peter A1 - Möller, F. A1 - Krüger, U. A1 - Schmidt, Franz A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc T1 - Einsatz von Thermografiegeräten zur berührungslosen Detektion der Haftungseigenschaften an keramischen Wärmedämmschichten BT - Temperatur 2020 Y1 - 2020 CY - Berlin ER - TY - GEN A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Pagel, R. A1 - Sarge, S. T1 - Temperature calibration of thermoanalytical apparatus above 1000 °C by means of Metal-Carbon Eutectics BT - ESTAC 2010 (Poster, Best Poster Award) Y1 - 2010 CY - Rotterdam (Niederlande) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Edler, F. T1 - High-temperature fixed-points for improved temperature metrology above 1100 °C BT - 9. Workshop on subsecond thermophysics, September 2010 Y1 - 2010 CY - Graz ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark A1 - Hodge, D. T1 - Development of Long Wavelength Infrared Radiation Thermometry for Measurements in Gas Turbines BT - Material Science and Engineering 2016 Y1 - 2016 CY - Darmstadt ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Keawprasert, T. A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Abd ElMageed, A. A1 - Sperling, A. T1 - Absolute Calibration of Spectral Responsivity for a Radiation Thermomemeter T2 - Proceedings of NEWRAD Y1 - 2008 SP - 287 EP - 288 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Krenek, S. A1 - Anhalt, Klaus A1 - Lindemann, A. A1 - Hollandt, Jörg T1 - A dynamic method to measure emissivity at high-temperatures BT - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen T1 - Radiation thermometry at PTB BT - Seminar der Japan Measuring Instruments Federation Y1 - 2004 CY - Tokyo (Japan) ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Identification of wavelength regions for non-contact temperature measurement of combustion gases at high temperatures and high pressures JF - High Temperatures – High Pressures N2 - Stationary gas turbines are still an important part of today's power supply. With increasing temperature of the hot combustion gas inside a gas turbine, the efficiency factor of the turbine increases. For this reason, it is intended to operate turbines at the highest possible gas temperature. Therefore, in the combustion chamber and especially at the position of the first stage guide vanes the gas temperature needs to be measured reliably. To determine the gas temperature, one promising approach is the application of a non-contact measurement method using a radiation thermometer. A radiation thermometer can measure the gas temperature remotely from outside of the harsh environment. At ZAE Bayern, a high temperature and high pressure gas cell has been developed for this purpose in order to investigate gases and gas mixtures under defined conditions at high pressures and high temperatures. This gas cell can … Y1 - 2020 VL - 49 IS - 3 SP - 241 EP - 260 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Sperfeld, P. A1 - Sakharov, M. A1 - Khlevnoy, B. A1 - Ogarev, S. A1 - Sapritsky, V. T1 - Irradiance measurements of Re-C, TiC-C and ZrC-C fixed point blackbodies BT - Newrad 2005 N2 - Specially designed Re-C, TiC-C and ZrC-C fixed-point cells for irradiance measurements have been produced by VNIIOFI. In several investigations at VNIIOFI and PTB the usability of the design for irradiance measurements has been demonstrated. Current developments of furnace uniformity demonstrate further improvements to the systems. Y1 - 2005 UR - http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.627.3617&rep=rep1&type=pdf ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Müller, Michael A1 - Möller, F. A1 - Krüger, U. A1 - Schmidt, F. A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc A1 - Ochs, Dennis A1 - Shandy, Amir T1 - Non-contact detection of the adhesion properties of ceramic based thermal barrier coatings by determining the surface temperatures using thermography BT - ECTP 2020 Y1 - 2020 CY - Venedig (Italien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Hay, B. A1 - Fleurence, N. A1 - Razouk, R. A1 - Anhalt, Klaus A1 - Sarge, S. A1 - Wu, J. A1 - Milosevic, N. A1 - Cataldi, M. A1 - Lorrette, C. A1 - Knopp, Kevin A1 - Boboridiss, K. A1 - Manara, Jochen A1 - Vidi, Stephan A1 - Pichler, P. A1 - Denner, T. T1 - Metrological facilities for thermophysical properties measurements at very high temperature BT - MSE 2020 Y1 - 2020 CY - Darmstadt ER - TY - CHAP A1 - Machin, Graham A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Beyon, G. A1 - Edler, F. A1 - Fourez, S. A1 - Jimeno-Largo, p. A1 - Lowe, D. A1 - Morice, R. A1 - Sadli, M. A1 - Villamanan, M. T1 - Future perspectives for high-temperature metrology from the FP5 HIMERT project BT - Metrologie 2005 Y1 - 2005 CY - Lyon (Frankreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Brunner, Martin T1 - Optische Sensorik für die additive Fertigung T2 - 4SMARTS 2019 Y1 - 2019 SN - 978-3-8440-6425-4 SP - 105 EP - 116 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Hollandt, Jörg A1 - Schreiber, Ekkehard A1 - Yamada, Y. T1 - Improved thermal stability of the linear pyrometer LP3 for high temperature measurements within the EU-Project HIMERT BT - Temperatur 2003 Y1 - 2003 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Lindner, D. A1 - Krüger, U. A1 - Schmidt, Franz T1 - Camera based investigation of high-temperature fixed-points for radiometric application T2 - Proceedings of NEWRAD Y1 - 2008 SP - 267 EP - 268 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Hollandt, Jörg T1 - Absolute radiometry for the MeP-K BT - The irradiance measurement method T2 - Tempmeko 2010 Y1 - 2010 CY - Portoroz (Slowenien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Joumani, Y. A1 - Hay, B. A1 - Razouk, R. A1 - Anhalt, Klaus A1 - Sarge, S. A1 - Wu, J. A1 - Milosevic, N. A1 - Cataldi, M. A1 - Lorrette, C. A1 - Boboridis, K. A1 - Manara, Jochen A1 - Vidi, Stephan A1 - Pichler, P. A1 - Denner, T. T1 - EMPIR Hi-TRACE project – Metrological facilities for measuring thermophysical properties up to 3000 °C BT - Tempmeko 2019 Y1 - 2019 CY - Chengdu (China) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - High temperature test-rig for emissvity and non-contact temperature measurements BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Non-Contact Temperature Measurement Of Combustion Gases at High Temperatures and High Pressures BT - Tempmeko 2016 Y1 - 2016 CY - Zakopane (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Krüger, U. A1 - Anhalt, Klaus A1 - Taubert, Dieter Richard A1 - Schmidt, Franz T1 - CCD-camera for measuring temperature and spectral radiance BT - CIE Division 2 symposium Y1 - 2010 CY - Bern ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Reichling, M. T1 - Complete Characterisation of local thermal heat transfer in high quality chemical vapour deposited diamond BT - 10th International conference on Photothermal and Photoacoustic Phenomena Y1 - 1998 CY - Rom (Italien) ER -