超胞材料β­Li2TiO3的结构、制备及应用

摘要

综述近几年国内外有关β­Li2TiO3材料的结构、制备方法以及应用的研究进展。详细阐述β­Li2TiO3材料的超胞结构，讨论可能存在的点缺陷，研究不同点缺陷对其超胞结构发育的影响；通过比较固相法、溶胶-凝胶法、燃烧合成法和水热合成法等制备β­Li2TiO3粉体的典型方法，指出关键在于改善湿化学工艺方法，使能获得超细粉体且保证超胞发育良好。分析β­Li2TiO3材料在氚增殖剂、锂离子电池、发光材料和微波介质材料等领域的重要应用。%Domestic and international development of the structure, preparation methods, and applications ofβ­Li2TiO3 was summarized. The supercell structure and the possible point defects inβ­Li2TiO3 were discussed. Besides, the effect of point defects on the supercell structure evolution was investigated. Several typical preparation methods, including the solid state synthesis method, the sol­gel method, the combustion method, and the hydrothermal method, were compared. It is suggested that attention should be paid to the improvement of the wet chemical methods, in order to obtain fine particles with well­developed supercell structure. Some important applications of β­Li2TiO3 as in the tritium breeders, lithium ion battery, luminescent materials, and microwave dielectric materials were analyzed in details.