Refine
Year of publication
Document Type
- Conference Proceeding (155)
- Article (82)
- Part of a Book (12)
- Image (6)
- Other (5)
- Report (2)
- Book (1)
- Magister's Thesis (1)
Keywords
- emissivity (2)
- infrared radiation (2)
- temperatur (2)
- Berührungslose Temperaturmessung (1)
- Contactless measurement (1)
- Emissionsgrad (1)
- Emissivität (1)
- Gasturbine (1)
- Gemischbildung (1)
- Infrarot-Strahlung (1)
Blackbody and other Calibration Sources, in Radiometric Temperature Measurements Part I Fundamentals
(2009)
Thermal transport in diamond
(2001)
High-temperature measurement techniques for the application in photometry radiometry and thermometry
(2009)
Strahlungsthermometrie
(2014)
Strahlungsthermometrie
(2006)
Thermodynamic temperature determinations of Co-C, Pd-C Pt-C and Ru-C eutectic fixed-points cells
(2006)
Quantitative thermal imaging of current densities and heat flow in electronic microstructures
(1996)
thermal diffusivity measurements by the laser flash method in the temperature range
from 23 °C to 3000 °C. The main objective was to assess the variability and coherency
of thermal diffusivity measurements performed at ultra-high temperatures at
the European level. Three refractory materials (molybdenum, tungsten and isotropic
graphite IG210) were selected for this inter-laboratory comparison, due to their high
melting point. The disk-shaped specimens needed were machined from the same
blocks of materials in order to reduce any potential scattering of results between
participants due to inhomogeneity effects.
The homogeneity of the sets of specimens was studied by the pilot laboratory (LNE)
before launching the comparison process. Thermal diffusivity measurements were
then carried out by the seven participants on the three materials during two successive
thermal cycles up to the maximum temperatures that can be reached by the
devices used. The analysis of results showed a good agreement between the participants
for temperatures above 400 °C, with relative deviations within the uncertainties
of measurement and lower than ± 4 % for molybdenum, ± 5 % for isotropic
graphite and ± 9 % for tungsten.
New PTB Set-up for the absolute calibration of the spectral responsivity of radiation thermometers
(2009)
Calibration and interpolation of the spectral responsivity of silicon photodiode based detectors
(2009)
Submicrosecond range surface heating and temperature measurement for efficient sensor reactivation
(2001)
A non-contact technique providing improved accuracy in area measurements of radiometric apertures
(2000)
Local variation of room temperature thermal conductivity in high quality polycrystalline diamond
(1998)
The influence of thermal barriers on heat flow in high quality chemical vapour deposited diamond
(1998)
An improved apparatus for measuring the spectral directional emissivity in the wavelength range between 1 µm and 20 µm at temperatures up to 2400 K is presented in this paper. As a heating unit an inductor is used to warm up the specimen, as well as the blackbody reference to the specified temperatures. The heating unit is placed in a double-walled vacuum vessel. A defined temperature, as well as a homogenous temperature distribution of the whole surrounding is ensured by a heat transfer fluid flowing through the gap of the double-walled vessel. Additionally, the surrounding is coated with a high-emitting paint and serves as blackbody-like surrounding to ensure defined boundary conditions. For measuring the spectral directional emissivity at different emission angles, a movable mirror is installed in front of the specimen, which can be adjusted by a rotatable arrangement guiding the emitted radiation into the attached FTIR-spectrometer. The setup of the emissivity measurement apparatus (EMMA) and the measurement procedure are introduced, and the derived measurement results are presented. For evaluating the apparatus, measurements were performed on different materials. The determined emissivities agree well with values published in literature within the derived relative uncertainties below 4% for most wavelengths.