BiFeO_3-SrBi_2Nb_2O_9陶瓷的介电与铁电性能研究  

Study on Dielectric and Ferroelectric Properties of BiFeO_3-SrBi_2Nb_2O_9 Ceramics

作　　者：黄海[1] 韩立波[1] 顾豪爽[2] 

机构地区：[1]长江大学物理科学与技术学院,荆州424023 [2]湖北大学物理学与电子技术学院,武汉430062

出　　处：《硅酸盐通报》2006年第6期17-20,79,共5页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(No.50272020);湖北省教育厅重大项目(No.Z200612001)

摘　　要：用传统的固相反应法制备了单相层状钙钛矿结构的xBiFeO3-(1-x)SrBi2Nb2O9(x=0、0.05、0.1)的铁电陶瓷,并对其电学性能进行了研究。研究结果表明BiFeO3的掺入降低了SBN的烧结温度,陶瓷晶粒尺寸减小,致密度提高;介电性能得到了改善,居里温度和在居里点的介电常数提高;铁电性能恶化,耐压特性下降。The single-phase xBiFeO 1-x ） SrBi2Nb2O9 （x = 0,0. 05,0. 1 ） ferroelectric ceramics of layered perovskite structure were 1pared by using the conventional solid state reaction, and the electrical properties were studied. The results indicate that the sintering temperature of SBN decreases, the grain sizes reduce but the density increases, the Curie temperatures and the dielectric constants at the Curie points both increase with the increasing concentration of BiFeO3, the dielectric enhancement has been observed, but the ferroelectric properties worsen, the voltage endurance decreases.

关 键 词：xBiFeO3-(1-x)SrBi2Nb2O9 陶瓷 层状钙钛矿结构 介电性能 铁电性能 

分 类 号：TQ174.756[化学工程—陶瓷工业]