MgTiO_3对SrTiO_3-Bi_2O_3nTiO_2系统的微观结构和介电性能的影响

The Influence of Microstructure and Dielectric Property of MgTiO 3 in SrTiO 3 Bi 2O 3· n TiO 2 System

研究了加入ＭｇＴｉＯ３的ＳｒＴｉＯ３－Ｂｉ２Ｏ３ｎＴｉＯ２系统的结构和性能的变化规律．研究表明，随ＭｇＴｉＯ３量增加，材料的相组成、晶格常数和性能均发生变化．加入的Ｍｇ２＋和Ｂｉ３＋在ＳｒＴｉＯ３晶格中发生电价补偿置换，使Ｂｉ３＋的固溶极限显著提高，产生强烈的移峰作用和展宽作用。

This paper studies the changing law of the microstructure and dielectric property of the SrTiO 3 Bi 2O 3· n TiO 2 system in which MgTiO 3 is added. According to our researches, with the increasing of MgTiO 3, the phase components, the crystal lattice constant and the dielectric property change. The added Mg 2+ and Bi 3+ have electrovalence compensation replacement which increases the Solid Solution limit of Bi 3+ in the SrTiO 3 crystal lattice. The Curie peak is moved and widened remarkably, meanwhile the materials temperature character is improved greatly.