Optische Manipulation von Mikropartikeln in mikro-opto-fluidischen Systemen. - In: DGaO-Proceedings, ISSN 1614-8436, Bd. 109.2008, B27, insges. 2 S.
http://www.db-thueringen.de/servlets/DocumentServlet?id=14656
The contribution of radiation heat transfer in temperature distribution of EM driven semi-transparent glass melt flow. - In: Proceedings of the 7th International Pamir Conference Fundamental and Applied MHD and COST P17 Annual Workshop 2008, (2008), S. 191-195
Chemical modification and radiation induced degradation of the photoresist SU-8. - In: 72nd annual meeting and DPG spring meeting of the Condensed Matter Section and the divisions: Physics Education, History of Physics, Radiation and Medical Physics as well as the working groups: Equal Opportunities, Industry and Business, Information, Physics and Disarmament, Physics of Socio-Economic Systems, Young DPG, 2008, CPP 10.3
Laser clad surfaces for shark-skin effect by high-temperature activation. - In: Surface and coatings technology, ISSN 1879-3347, Bd. 203 (2008), 5/7, S. 470-475
Embedding ceramic particles with a negative thermal expansion coefficient into a metallic corrosion resistant coating can establish a reversible thermal activation of a defined surface microstructure with the aim of having a shark-skin at high temperatures (in use) and self-cleaning at low temperatures (out of use). For that, CoNiCrAlY alloy is intermixed with yttrium and tungsten oxide as powder and then laser cladded onto a substrate. This coating is implanted with energetic ions in order to incubate the formation of Y2W3O12 which is a ceramic with strong negative thermal expansion. Such prepared coatings are then exposed to high temperature and the effects are investigated in detail. Results of phase formation, surface micro-morphology, microstructure and properties of the coatings are presented.
https://doi.org/10.1016/j.surfcoat.2008.08.066
Verkupfern textiler Materialien. - In: Tagungsband, ISBN 978-3-00-024955-6, (2008), S. 75-79
Design of a sensor for the stepping contact force of a walking machine. - In: Prospects in mechanical engineering, (2008), S. 79-80
A novel GaN-based multiparameter sensor system for biochemical analysis. - In: Physica status solidi, ISSN 1610-1642, Bd. 5 (2008), 6, S. 2361-2363
http://dx.doi.org/10.1002/pssc.200778726
Ultra-thin InGaN photodetectors for standing wave interferometry. - In: Physica status solidi, ISSN 1610-1642, Bd. 5 (2008), 6, S. 2117-2119
http://dx.doi.org/10.1002/pssc.200778467
Potenziale elektromagnetischer Kräfte zur Modifizierung von Glasschmelzen. - In: Programm und Referate, ISBN 978-3-921089-55-2, (2008), insges. 16 S.
Die elektromagnetische Modifizierung von Materialien mittels elektromagnetisch generierter Kraftdichten steht seit Jahren im Fokus wissenschaftlicher Untersuchungen. Dazu zählen Prozesse wie das Schmelzen, Erstarren, Kristallisieren, Abscheiden von metallischen und anorganisch-nichtmetallischen Materialien in Magnetfeldern. - Grundsätzliche Voraussetzungen für die Wirkung von elektromagnetischen Kräften in Materialien sind bewegliche elektrisch geladene Teilchen (woraus elektrische Leitfähigkeiten resultieren, mit denen in einem elektrischen Feld Stromdichten erzeugt werden können) oder bewegliche mit magnetischen Momenten behaftete Teilchen/Bereiche (woraus endliche Suszeptibilitäten resultieren) und in jedem Fall das Vorhandensein eines Magnetfeldes. Dann wirken im oder auf das Material Lorentzkräfte und/oder paramagnetische Kräfte. - Im vorliegenden Beitrag werden die Realisierbarkeit solcher elektromagnetischer Kräfte in Glasschmelzen diskutiert und Ergebnisse zu deren Modifizierung aus eigenen Forschungen, die im Rahmen der von der DFG seit 2001 geförderten Forschergruppe "Magnetofluiddynamik" und weiterer bilateraler FuE-Projekte durchgeführt werden konnten, vorgestellt.
Synthesis of partial Mn2+/Ti4+-substituted single crystalline barium hexaferrite powders by glass crystallization technique. - In: Proceedings of the 10th international conference of the European Ceramic Society (ECerS), (2008), S. 803-808
Single crystalline hexaferrite powders with tailor-made properties are again interesting for different innovative applications, e.g. high-density recording media, chemical and microwave absorbing materials or hyperthermia in medicine. For the preparation of modified single crystalline barium hexaferrite powders (BaFe12-2xAIIxBIVxO19) we used the glass crystallization technique in the system BaO-Fe2O3-B2O3. The modifications result from the variation of the crystallization conditions and the partial substitution of the Fe3+-ions by Mn2+- and Ti4+-ions. - We report modifications of the crystallization behaviour, the phases, morphology and the magnetic properties of the barium hexaferrite powders. The crystallization behaviour was investigated by differential scanning calorimetry. The phases were determined by X-ray diffraction. The crystal morphology was analysed by scanning electron microscopy. The magnetic properties were measured by a vibrating sample magnetometer. Further the chemical compositions were determined by different methods, for example ICP. - The investigations show that increasing Fe3+-ion substitution causes decreasing coercivities at nearly constant saturation magnetizations without the change of the crystallographic structure (M-type). The attained cation substitutions Mn2+/Ti4+ in the hexaferrite crystals increase up to 2x = 3 with increased melt dopings MnO/TiO2 up to 10.8 mole-% . The partial Fe3+-substitutions in the powder are predetermited by the melt dopings. The properties are compared to undoped barium hexaferrite powders and to the results of other works.