Ternary and Quaternary Nitrides

本研究的目的是探索新型固态氮化物的合成、晶体结构和性能。由于许多二元氮化物具有相当大的技术用途，例如，涂料，陶瓷和超导体，我们建议研究更复杂的氮化物，可能导致增强或新的性能。我们的方法包括使用正电金属来稳定三元相，以及使用钠通量来生长某些化合物的小晶体。我们还将扩大我们的合成方法，使用比钠更普遍有用的金属助焊剂，特别是镓、镁和锌。这些材料的结构和性质将与相关化合物如氧化物、硫化物或磷化物进行比较。二元氮化物，如氮化硅、氮化铝、氮化钛和氮化镓，在固态激光器、硬涂层和高温陶瓷等方面有许多技术用途。然而，更复杂的氮化物尚未制备或研究。本研究将着重于建立制备此类材料的方法及其晶体结构和性质。＊＊＊

9805719 DiSalvo The objective of this research is to explore the synthesis of new solid state nitrides, their crystal structure and properties. Since a number of binary nitrides have considerable technological utility as for example, coatings, ceramics, and superconductors, we propose to study more complex nitrides that may lead to enhanced or new properties. Our approaches include the use of electropositive metals to stabilize a ternary phase and of sodium flux to grow small crystals of some compounds. We will also expand our synthetic methods to the use of metallic fluxes that are more generally useful than sodium, specifically gallium, magnesium, and zinc. The structures and properties of these materials will be compared to related compounds such as oxides, sulfides or phosphides. %%% Binary Nitrides, such as Silicon Nitride, Aluminum Nitride, Titanium Nitride, and Gallium Nitride have many technological uses as solid state lasers, hard coatings, and high temperature ceramics. Yet more complex nitrides have not been prepared or studied. This research will focus on establishing the methods of preparing such materials and on their crystal structures and properties. ***