Ternary and Quaternary Nitrides

本计画将探讨三元及四元氮化物的制备与存在，并研究其性质。二元氮化物已经有许多重要的用途。这些材料包括氮化铝（高导热性基材）、氮化硅（用于电子产品的涂层等）、氮化钛（用于工具的硬涂层），氮化钽（电子产品中的金属导体和扩散阻挡层，珠宝、艺术显示器中的彩色表面等），氮化铌（薄膜超导器件）、氮化镓（蓝光LED、高速大功率电子器件）。从氧化物化学可知，三元和四元化合物比二元化合物提供更大、更可调、性质不同和更有用的性质。因此，有理由预期三元和四元氮化物最终将提供相同的，因为已知有如此多有用的二元氮化物，并且已经发现了结构上有趣的化合物，其中一些具有不寻常的性质。预期这些新氮化物中的一些将在微电子学或光子学中得到应用。这项研究也将成为培养本科生，研究生和博士后在固态科学的前沿技术和方法的工具。与行业的互动将继续。技术摘要：本文将探索三元和四元氮化物的制备和存在，并研究它们的性质。 熔融金属及其合金与氮化锂，唯一的一致熔融氮化物，将被用作熔剂（溶剂），以制备多元氮化物，并检查它们的潜在技术用途和新现象。初步结果表明，这些焊剂和这些焊剂的合金将是非常有用的，在生产大量的新化合物具有新颖的结构和性能。这项研究也将成为现代固态化学科学和艺术的本科生，研究生和博士后培训的工具。我们的研究结果已经并将通过WEB、出版物、研讨会、专业会议以及适当的专利进行广泛传播。

Non-Technical AbstractThis project will explore the preparation and existence of ternary and quaternary nitrides and study their properties. There are already many important uses of binary nitrides. These include aluminum nitride (high thermal conductivity substrates), silicon nitride (coatings for electronics, etc.), titanium nitride (hard coatings for tools), tantalum nitride (metallic conductors and diffusion barriers in electronics, colored surfaces in jewelry, artistic displays, etc.), niobium nitride (thin film super-conducting devices), gallium nitride (blue LEDs, high speed high power electronics). As is known from oxide chemistry, ternary and quaternary compounds offer a greater, more tunable, qualitatively different and more useful set of properties than the binaries alone. So it is reasonable to expect that ternary and quaternary nitrides will eventually provide the same, since so many useful binary nitrides are known and since structurally interesting compounds have been found, some with unusual properties. It is expected that some of these new nitrides will find utility in microelctronics or photonics. This research will also be a vehicle for the training of undergraduates, graduate students and postdocs in forefront techniques and methods of Solid State Science. Interactions with industry will continue. Technical AbstractThe preparation and existence of ternary and quaternary nitrides will be explored and their properties will be studied. Molten metals and their alloys with lithium nitride, the only congruently melting nitride, will be used as fluxes (solvents) to prepare multinary nitrides and to examine them for potential technological uses and for novel phenomena. Initial results suggest that these fluxes and alloys of these fluxes will be highly useful in producing a large number of new compounds with novel structures and properties. This research will also be a vehicle for the training of undergraduates, graduate students and postdocs in the science and art of modern Solid State Chemistry. Our results have been and will be widely disseminated via the WEB, publications, seminars, professional meetings and, where appropriate, via patents.