(1-x)Bi_(0.5)(Na_(0.8)K_(0.2))_(0.5)TiO_3-xLaFeO_3无铅压电陶瓷微结构与性能研究  

Microstructure and Electrical Properties of (1-x)Bi_(0.5)(Na_(0.8)K_(0.2))_(0.5)TiO_3-xLaFeO_3 Lead-free Pi-ezoelectric Ceramics

作　　者：蒲红玉[1] 廖运文[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：《西华师范大学学报（自然科学版）》2010年第4期390-393,共4页Journal of China West Normal University(Natural Sciences)

基　　金：西华师范大学科研启动经费项目(07B009)

摘　　要：采用传统压电陶瓷工艺制备了新型无铅压电陶瓷材料(1-x)Bi0.5(Na0.8K0.2)0.5TiO3-xLaFeO3.研究了该体系陶瓷的晶相结构、表面形貌和压电性能.结果表明,该体系陶瓷具有单相钙钛矿结构,LaFeO3促进陶瓷致密化和晶粒生长.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;εr和tanδ分别为1312和0.046.A new type of lead-free pizeoelectric ceramics（1-x）Bi0.5（Na0.8K0.2）0.5TiO3-xLaFeO3 was fabricated by conventional electric ceramics processes,and the microstructure,dielectric and piezoelectric properties of the ceramics were also studied.The restults show that all ceramics samples exhibit a single-phase perovskite structure.The piezoelectric coefficient d33 and the electromechanical coupling coefficient kp of the ceramics attain 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 attain maximum values of 1312 and 0.046 respectively at x=0.01.

关 键 词：钛酸铋钠 无铅压电陶瓷 压电性能 介电性能 

分 类 号：TQ134.1[化学工程—无机化工]