Synthesis and Properties of New Early Transition Metal Sulfides

新型早期过渡金属硫化物的合成与性能

• 批准号: 9223060
• 负责人: Bryan Eichhorn
• 金额: $ 24万
• 依托单位: University of Maryland, College Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-15 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9223060&HistoricalAwards=false
• 关键词: Synthesis; Properties; New; Early; Transition

The aim of this research is to investigate synthesis, structure, and properties of new early transition metal sulfide phases. The proposed compounds will have perovskite related or layer structures and transition metals with do to d1 configurations. A variety of synthetic techniques will be employed such as BaCl2 flux reactions, CS2 sulfiding reactions, and sulventothermal reactions. All compounds will be characterized by XRD, transport, and magnetic measurements. These compounds will allow comparisons of the structures and properties of isocompositional oxides and sulfides in the areas where metal insulator transitions occur. The importance of structure and covalency in the formation of new metallic solids will be addressed. %%% The aim of this research is to investigate synthesis, structure, and properties of new classes of unexplored solid state materials. These compounds will comprise early transition metals (Ti, Zr, Hf, V, Nb, Ta) and sulfur. Attempts are made to design features into these materials that are known to be important in the copper oxide superconductors. The atomic structure and properties of the new materials will be determined. The importance of structure and bonding in the formation of new materials, with desirable properties such as metallic behavior and/or superconductivity, will be addressed.

本研究的目的是研究新的早期过渡金属硫化物相的合成、结构和性能。建议的化合物将具有与钙钛矿相关的或层状结构和具有DO到D1位配置的过渡金属。将采用各种合成技术，如BaCl2助熔剂反应、CS2硫化反应和硫热反应。所有化合物都将通过X射线衍射、输运和磁性测量进行表征。这些化合物将可以比较发生金属绝缘体转变的区域中等组分氧化物和硫化物的结构和性质。将讨论结构和共价性在形成新的金属固体中的重要性。本研究的目的是研究尚未开发的新型固态材料的合成、结构和性能。这些化合物将包括早期过渡金属(钛、锆、氢、钒、铌、钽)和硫。人们试图在这些材料中设计一些已知在铜氧化物超导体中很重要的特征。新材料的原子结构和性质将被确定。将讨论结构和成键在新材料形成中的重要性，这些新材料具有理想的性能，如金属行为和/或超导电性。