TY - JOUR A1 - Beck, Uwe A1 - Hübert, Thomas A1 - Kleinke, Helga T1 - Amorphous and nanocrystalline SrTiO3 thin films JF - Journal of non-crystalline solids KW - Schicht, dünn KW - Schicht, amorph KW - Schicht, nanokristallin KW - SrTiO3 PY - 1996 SN - 0022-3093 VL - 196 SP - 150 EP - 154 PB - North-Holland Publ. Co. CY - Amsterdam AN - OPUS4-652 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Massiot, D. A1 - Müller, D. A1 - Hübert, Thomas A1 - Schneider, M. A1 - Kentgens, A. A1 - Coté, B. A1 - Coutures, J. A1 - Gessner, W. T1 - Double rotation and magic-angle spinning nuclear magnetic resonance study of 27Al: reexamination of the aluminium borate 9Al2O3 · 2B2O3 JF - Solid state nuclear magnetic resonance N2 - 27Al nuclear magnetic resonance spectra of polycrystalline aluminium borate 9Al2O3 · 2B2O3 have been measured in double rotation at 11.7 and 7.0 T and high-speed magic-angle spinning at 7.0, 9.4, 11.7, 14.1 and 17.6 T. Spinning sidebands from the satellite transitions were observed at 7.0 and 14.1 T. Each of the four structural aluminium sites [Al(IV), Al(V)(1), Al(V)(2) and Al(VI)] are observed, characterised and assigned in the spectra. The obtained parameter set gives a fully consistent interpretation in agreement with the crystal structure of the compound. KW - Aluminium KW - Kernresonanz, magnetisch KW - Winkel, magisch KW - Doppelrotation PY - 1995 DO - https://doi.org/10.1016/0926-2040(95)00021-H SN - 0926-2040 SN - 1527-3326 VL - 5 IS - 2 SP - 175 EP - 180 PB - Academ. Press CY - Orlando, Fla. AN - OPUS4-639 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hübert, Thomas T1 - Humidity-Sensing Materials JF - MRS bulletin KW - Humidity-Sensing PY - 1999 DO - https://doi.org/10.1557/S0883769400052519 SN - 0883-7694 SN - 1938-1425 VL - 24 IS - 6 SP - 49 EP - 54 PB - Materials Research Society CY - Pittsburgh, Pa. AN - OPUS4-810 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Mosel, Günter A1 - Willfahrt, Manfred A1 - Banach, Ulrich A1 - Hübert, Thomas T1 - An extended X-ray absorption fine structure investigation on the local environment of niobium ions in Nb2O5-doped SrTiO3 glass ceramics JF - Journal of materials science PY - 1997 SN - 0022-2461 SN - 1573-4803 VL - 32 SP - 1591 EP - 1597 PB - Springer Science + Business Media B.V. CY - Norwell, Mass. AN - OPUS4-2045 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hübert, Thomas A1 - Schuffenhauer, W. A1 - Wernecke, R. T1 - Selbstüberwachendes und -regenerierendes System zur Online-Spurenfeuchtemessung in chemischen Prozessgasen JF - Chemie - Ingenieur - Technik PY - 2000 DO - https://doi.org/10.1002/1522-2640(200011)72:11<1376::AID-CITE1376>3.0.CO;2-C SN - 0009-286X SN - 1522-2640 VL - 72 IS - 11 SP - 1380 EP - 1382 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-2048 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hübert, Thomas A1 - Mosel, Günter A1 - Witke, Klaus T1 - Structural Elements in Borovanadate Glasses JF - Glass physics and chemistry N2 - The structure of glasses in the Li2O–B2O3–V2O5and ZnO–B2O3–V2O5systems of a high modifier content ([Li2O, ZnO]/[B2O3] ratio > 1) and 10 to 50 mol % V2O5are investigated by V-KEXAFS and Raman spectroscopy. In the glasses investigated, VO4tetrahedra are the predominant coordination polyhedra for the vanadium ions. The symmetry of the tetrahedra is more or less distorted in comparison with crystalline substances. The VO4tetrahedra can be either directly connected to each other or incorporated into the borate groupings of the BO3and BO4units. An increase in the vanadium content in the glasses reduces the interconnection of structural units and, therefore, the glass transition and crystallization temperatures. T2 - International Conference "Thermodynamics and Chemical Structure of melts and Glasses" CY - St. Petersburg, Russia DA - 1999-09-07 PY - 2001 DO - https://doi.org/10.1023/A:1011376225695 SN - 1087-6596 SN - 1608-313X VL - 27 IS - 2 SP - 114 EP - 120 PB - Pleiades Publ. CY - New York, NY AN - OPUS4-2049 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Polyakova, Irina A1 - Hübert, Thomas T1 - Thermal stability of TiN thin films investigated by DTG/DTA JF - Surface and coatings technology N2 - The paper demonstrates the scope of the differential thermal analysis coupled with the thermal gravimetry as an express method for estimation of thin film protecting ability and oxidation kinetics. Oxidation of an iron foil protected by the PVD titanium nitride thin film coating was investigated as well as non-isothermal oxidation of PVD thin films of TiN (two types of the preparation procedure), (Ti,Nb)N and (Ti,Al)N isolated from a substrate by dissolving them in an acid. Additions of aluminium and niobium are expected to improve chemical, thermal and biomedical properties of thin films for their technical application. It was established that the addition of niobium decreases, whereas the addition of aluminium not only increases the thermal stability of TiN coatings, but also changes the oxidation mechanism. It was demonstrated that the TiN film oxidation is a many-staged process depending on the heating rate. An opportunity of a quite formal treatment for getting Kissinger's estimation of kinetics parameters of different oxidation stages is also demonstrated. PY - 2001 DO - https://doi.org/10.1016/S0257-8972(01)01042-8 SN - 0257-8972 VL - 141 IS - 1 SP - 55 EP - 61 PB - Elsevier Science CY - Lausanne AN - OPUS4-2050 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hübert, Thomas A1 - Willfahrt, Manfred A1 - Witke, Klaus A1 - Reich, Peter T1 - Low Frequency Raman Investigations of Lead Borate and Lead Alumino Borate Glasses JF - Journal of molecular structure PY - 1995 SN - 0022-2860 SN - 1872-8014 SN - 0377-046X VL - 349 SP - 373 EP - 376 PB - Elsevier CY - Amsterdam AN - OPUS4-3776 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hübert, Thomas A1 - Schuffenhauer, W. A1 - Wernecke, R. T1 - Self-Monitoring and Self-Regenerating System for On-line Measuring of Moisture Traces in Chemical Process Gases JF - Chemical engineering & technology PY - 2002 DO - https://doi.org/10.1002/1521-4125(200205)25:5<492::AID-CEAT492>3.0.CO;2-L SN - 0930-7516 SN - 1521-4125 VL - 25 IS - 5 SP - 492 EP - 494 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-3777 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Hübert, Thomas A1 - Schwarz, J. A1 - Oertel, B. T1 - Sol-gel alumina coatings on stainless steel for wear protection JF - Journal of sol gel science and technology N2 - The aluminium oxide films on austenitic steel are prepared from sols of re-dispersed boehmite nano powders in water. After dip-coating of the sol, a heat treatment including drying, calcination and annealing in vacuum at temperatures up to 1100°C is performed to obtain crack-free coatings of a thickness up to 6 µm. XRD measurements detect α- and γ-alumina, a TiOx-phase at the metal/coating interface and a gradient of phase formation in the coating. The strong adhesion on the substrates is due to the layered assembly and gradient composition of the coating caused by an inter-diffusion of metal cations and oxygen in the metal/oxide interface during heat treatment. Residual stress measurements by X-rays result in compressive stresses of 2–4 GPa in the alumina coatings. The pin-on-disc test shows a remarkable improvement of wear resistance obtained by sol-gel coatings. The α-alumina content and the compressive stress of the coatings correlate with wear resistance of the coatings. KW - Alumina KW - Sol-gel KW - Coating KW - Wear protection KW - Residual stress PY - 2006 DO - https://doi.org/10.1007/s10971-006-6470-7 SN - 0928-0707 SN - 1573-4846 VL - 38 IS - 2 SP - 179 EP - 184 PB - Kluwer Academic Publ. CY - Dordrecht AN - OPUS4-12435 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -