BNKT-xLaFeO_3压电陶瓷的性能与微结构  

Microstructure and Electrical Properties of BNKT-xLaFeO_3 Pi-ezoelectric Ceramics

作　　者：蒲红玉[1] 廖运文[1] 毛丽君[1] 刘育芳[1] 李伟[1] 

机构地区：[1]化学合成与污染控制技术四川省重点实验室西华师范大学化学化工学院,四川南充637009

出　　处：《广州化工》2011年第7期51-53,共3页GuangZhou Chemical Industry

基　　金：西华师范大学科研启动经费项目(项目编号:07B009)

摘　　要：采用传统固相法合成了（1-x）Bi0.5（Na0.8K0.2）0.5TiO3-xLaFeO3无铅压电陶瓷。通过XRD分析,发现该三元体系压电陶瓷均能形成单相钙钛矿结构,并在x=0.005~0.01时范围内具有三方和四方共存结构,为该体系的准同型相界。并研究了该体系压电陶瓷的压电和介电性质。研究结果表明,在室温下该体系表现出较好的压电和介电性能：压电常数d33和机电耦合系数kp分别达到119 pC/N和0.26;相对介电常数εr和介电损耗tanδ分别为1312和0.046。A ternary system lead-free pizeoelectric ceramics,（1-x）Bi0.5（Na0.8K0.2）0.5TiO3-xLaFeO3 were fabricated by traditional ceramics technology.The results showed that all the ceramics samples had a single-phase perovskite structure by XRD.The morphotropic phase boundaries（MPB） of the system between rhombohedral and tetragonal locates in the range of x=0.005~0.01.The piezoelectric constant d33 and the electromechanical coupling factor kp of the ceramics attained maximum values of 119 pC/N and 0.26,respectively,at x=0.003.The dielectric constant εr and dielectric loss tanδ of the ceramics attained maximum values of 1312 and 0.046,respectively,at x=0.01.

关 键 词：BNT-BKT 压电性能 介电性能 

分 类 号：TQ174.758[化学工程—陶瓷工业]