Enhanced piezoelectric properties of (Ba_(0.3)Bi_(0.7))(Mg_(0.05)Fe_(0.6)Ti_(0.35))O_(3) piezoelectric ceramics with high Curie temperature

作     者：Ichiro Fujii Ryuta Mitsui Kouichi Nakashima Satoshi Wada 

作者机构：Interdisciplinary Graduate School of Medical and Engineering University of YamanashiKofu 400-8510Japan 

出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)

年 卷 期：2014年第4卷第1期

页      面：81-86页

学科分类：081702[工学-化学工艺] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by Elements Science and Technology Project of the Ministry of Education Culture Sports Science and Technology Japan 

主　　题：Piezoelectrics domain structure lead-free high Curie temperature dopant. 

摘      要：(Ba_(0.3)Bi_(0.7))(Mg_(0.05)Fe_(0.6)Ti_(0.35))O_(3) ceramics were either doped with vanadium or sintered in calcined powder with the same *** to an undoped ceramic sintered without the calcined powder,both ceramics showed reduced leakage current densities(lower than 1×10^(-7) A/cm^(2))and absence of dielectric relaxation behaviors observed in frequency-and temperaturedependent dielectric *** Curie temperatures of both samples were higher than 460℃.The maximum field-induced strain over the applied field,S_(max)/E_(max),of 366 pm/V of the undoped ceramic sintered without the calcined powder increased to 455 and 799 pm/V for the V-doped ceramics and the ceramics sintered with the calcined powder,*** increase was related to a reduced concentration of bismuth vacancy-oxygen vacancy defect dipoles.