Solid-State Metathesis Reactions Under Pressure

1 9704964卡纳在固态中的高度放热的化学交换(化合)反应可以被设计成快速地产生否则难以形成的材料。该项目将探索压力的应用，为合成在环境条件下无法获得的高压相开辟一个新的参数空间。这种固相歧化反应的方法将为形成高质量固溶体和控制微晶尺寸提供一种新的合成方法，本研究探讨的重要问题将极大地促进化学加工领域的发展。要研究的材料类别具有相当大的潜在技术重要性，包括氮化镓和立方氮化硼的晶体尺寸和光致发光研究，立方氮化硼是仅次于钻石的第二硬材料。还将测试形成钻石和替代碳材料的方法。***

1 9704964 Kaner Highly exothermic chemical exchange (metathesis) reactions in the solid-state can be designed to lead rapidly to materials that are otherwise difficult to form. This project will explore the application of pressure to open a new parameter space for the synthesis of high pressure phases which inaccessible under ambient conditions. This approach to solid state metathesis reactions will provide a new synthetic method for forming high quality solid solutions, and for controlling crystallite size, and the important questions explored in this research will have advance considerably the area of chemical processing. %%% The classes of materials to be investigated are of considerable potential technological importance and include crystal size and photoluminescence studies on gallium nitride, and cubic boron nitride, the second hardest materials known after diamond. Methods for forming diamond and substituted carbon materials will also be tested. ***