Effects of La^(3+) on microwave dielectric properties of(Pb_(0.5)Ca_(0.5))(Fe-(0.5)Ta_(0.5))O_3 ceramics  

作　　者：江永长 顾莹 杨秋红 金应秀 

机构地区：[1]School of Materials Science and Engineering,Shanghai University [2]Department of Materials Engineering,Kyonggi University

出　　处：《Journal of Shanghai University(English Edition)》2011年第6期535-537,共3页上海大学学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No.60578041);the National High Technology Research and Development Program of China (Grant No.715-006-0060)

摘　　要：This work investigated the microwave dielectric properties of A-site substitution by rare earth La3＋in（Pb0.5Ca0.5）（Fe0.5Ta0.5）O3（PCFT） system.A single perovskite phase was obtained only when the doping content was 2%.Suitable La3＋ doping improved microwave dielectric performances.Excessive La3＋doping caused the formation of secondary phase,which resulted in the decreasing of permittivity εrand quality factor Qfvalues.Especially,when the doping content is 2%-5%,permittivity εrwas above 75 and Qfvalues were 6 902-7 416 GHz.This work investigated the microwave dielectric properties of A-site substitution by rare earth La3＋in（Pb0.5Ca0.5）（Fe0.5Ta0.5）O3（PCFT） system.A single perovskite phase was obtained only when the doping content was 2%.Suitable La3＋ doping improved microwave dielectric performances.Excessive La3＋doping caused the formation of secondary phase,which resulted in the decreasing of permittivity εrand quality factor Qfvalues.Especially,when the doping content is 2%-5%,permittivity εrwas above 75 and Qfvalues were 6 902-7 416 GHz.

关 键 词：（Pb0.5Ca0.5）（Fe0.5Ta0.5）O3（PCFT） A-site substitution microwave dielectric properties microstructure 

分 类 号：O482.4[理学—固体物理]