Temperature dependent conductivity of Bi_4Ti_3O_(12) ceramics induced by Sr dopants

作     者：Lin WANG Mengqi GUI Hai-Bo JIN Xinyuan HU Yongjie ZHAO Naseer Muhammad ADNAN Jing-Bo LI 

作者机构：Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green ApplicationsSchool of Materials Science and EngineeringBeijing Institute of Technology 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2018年第7卷第3期

页      面：256-265页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by National Basic Research Program of China (No. 2016YFB0700502) National Natural Science Foundation of China (No. 51372024) 

主　　题：dielectric impedance analysis electrical properties defects Aurivillius compound 

摘      要：Bi_4Ti_3O_(12) is an important lead-free ferroelectric *** modification of Bi_4Ti_3O_(12)has attracted great attention to improving its *** this work,the effect of Sr dopants on the microstructure,dielectric,and conductivity of Bi_4Ti_3O_(12) ceramic was investigated by XRD,SEM,and AC impedance *** of 1 at%Sr for Bi decreased the grain size,suppressed the dielectric dispersion of Bi_4Ti_3O_(12) ceramic at room temperature,and resulted in different effects on the conductivity of grains and grain *** conductivity of grains in Bi_4Ti_3O_(12) ceramic was increased by the small amount of Sr dopants in the whole experimental temperature *** the grain boundaries of 1 at%Sr-doped Bi_4Ti_3O_(12) exhibited lower conductivity than pure Bi_4Ti_3O_(12) below～380℃and higher conductivity above～380℃.The experimental phenomena were interpreted in term of compensating defects for Sr dopants.