Acquisition of a High Temperature Thermogravimetric/Differential Analyzer (TGA/DTA) for Fundamental Materials Synthesis Kinetic Studies

该奖项为获得热重/差分分析仪提供了部分支持，用于基本材料合成，高温下氮化物的反应动力学研究。基本的动力学研究将是氮化物、碳化物、硼化物和其他散装粉末的合成，以及沉积在衬底上的氮化物薄膜。该系统将能够测量氧化铝、石墨和铂坩埚中的粉末、颗粒和固体材料。合成研究将包括碳热还原、直接氮化和气相反应。高温合成研究的结合将在大样本上进行，以便对分析的材料进行充分的采样。这种能力对于提高我们对氮化物的认识非常重要，氮化物比硅基材料具有更高的热容量，并且对通信具有光学光子重要性。该设备奖将用于研究利用高温热重/差分分析仪合成氮化物、碳化物、硼化物和其他非氧化物材料的机理和动力学。该仪器将提供与传统设备相比独特的高温和大负载能力的组合，并且将允许在大样品上进行基本的高温合成研究，允许对材料进行充分的采样以进行分析。氮化粉末的生产目前是有限的。在制造含氮化物结构方面有相当大的技术兴趣，最近也有一些成功的例子。这种能力对于提高我们对氮化物的认识非常重要，氮化物比硅基材料具有更高的热容量，并且对通信具有光学光子重要性。＊＊＊

9704070 Weimer This award provides partial support for the acquisition of a thermogravimetric/ differential analyzer to be used for fundamental materials synthesis reaction kinetic studies of nitrides at high temperatures. The basic kinetic studies will be on the synthesis of nitrides, carbides, borides, and other bulk powders as well as nitride films deposited on substrates. The system will be capable of measuring powder, granular and solid materials in alumina, graphite, and platinum crucibles. Synthesis studies will include carbothermal reduction, direct nitridation, and gas phase reactions. The combination of high temperature synthesis studies to be carried out on large samples to allow for sufficient sampling of the materials for analysis. This capability is important for advancing our knowledge of nitrides, which have higher thermal capacities than silicon based materials, and have optical-photonic importance for communications. %%% This equipment award will support the research program for the investigation of the mechanism and kinetics for the synthesis of nitride, carbide, boride, and other non-oxide materials using high temperature thermogravimetric/differential analyzer. The instrument will provide a combination of high temperature with large loading capacity which is unique compared with conventional equipment, and will allow fundamental high temperature synthesis studies to be carried out on large samples, allowing for sufficient sampling of the material for analysis. The production of nitride powders is currently limited. There is considerable technological interest in producing structures with nitrides, and some recent examples of success. This capability is important for advancing our knowledge of nitrides, which have higher thermal capacities than silicon based materials, and have optical-photonic importance for communications. ***