Ba_(1-x)Sr_xTi_(0.88)Sn_(0.12)O_3陶瓷结构与介电性能的研究  

Microstructure and Dielectric Properties of Ba_(1-x)Sr_xTi_(0.88)Sn_(0.12)O_3 Ferroelectric Ceramics

作　　者：云斯宁[1] 王晓莉[1] 孙晓亮[1] 

机构地区：[1]西安交通大学理学院,西安710049

出　　处：《材料工程》2006年第9期49-52,共4页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(50272052)

摘　　要：采用高温固相烧结法制备了Ba1-xSrxTi0.88Sn0.12O3(x=0.10,0.20,0.30,0.40,0.50)陶瓷,研究了Sr含量及烧结温度对Ba1-xSrxTi0.88Sn0.12O3陶瓷结构与介电性能的影响。XRD初步分析表明Ba1-xSrxTi0.88Sn0.12O3陶瓷在室温为立方钙钛矿结构。进一步的研究表明Ba1-xSrxTi0.88Sn0.12O3陶瓷的介电性能与对A位、B位进行的离子取代密切相关。随着Sr含量的增加,不同烧结温度下Ba1-xSrxTi0.88Sn0.12O3陶瓷的介电性能下降,相变温度Tc移向低温。尽管在所研究的组分范围内Ba1-xSrxTi0.88Sn0.12O3表现出扩散相变铁电体的特征,但是典型的介电弛豫行为并没有被观察到。Effects of Sr concentration and sintering temperature on microstructure and dielectric properties of Ba1-xSrxTi0.88Sn0. 12O3（x=0. 10, 0. 20, 0. 30, 0.40 and 0.50）ceramics prepared by a high temperature solid-state technique were investigated. A preliminary structural XRD analysis of these compounds shows the formation of cubic perovskite structure. Detailed studies show that the dielectric properties of these compounds are closely related to Sr^2＋ and Sn^4- ions substituting for A- and B-site in Ba1-xSrxTi0.88Sn0. 12O3 solid solutions ceramics. The dielectric properties of Ba1-xSrxTi0.88Sn0. 12O3 ceramics decrease and the temperature of the maximum dielectric constant Tc shifts to lower temperature with increasing x values. A typical relaxation behavior is not observed, though all studied compositions exhibit the broad diffused phase transitions.

关 键 词：Ba1-xSrxTi0.88Sn0. 12O3陶瓷 烧结 介电性能 扩散相变 弛豫行为 

分 类 号：TM22[一般工业技术—材料科学与工程]