Effects of thermal and electrical histories on structure and dielectric behaviors of(Li_(0.5)Nd_(0.5))^(2+)-modified(Bi_(0.5)Na_(0.5))TiO_(3)-BaTiO_(3) ceramics  

作　　者：Jiwen Xu Qingning Li Ling Yang Weidong Zeng Changrong Zhou Changlai Yuan Guohua Chen Guanghui Rao 

机构地区：[1]Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin,Guangxi,541004,China

出　　处：《Journal of Materiomics》2017年第2期121-129,共9页无机材料学学报（英文）

基　　金：Part of this work was financially supported by the National Nature Science Foundation of China(11564007,61561015,and 61361007);Guangxi Key Laboratory of Information Materials(1310001-Z);the Natural Science Foundation of Guangxi(2015GXNSFAA 139250).

摘　　要：The effect of thermal and electrical histories on structure and dielectric behaviors is studied using 0.95(Bi_(0.5)Na_(0.5))_(0.97)(Li_(0.5)Nd_(0.5))_(0.03)TiO_(3)-0.05BaTiO_(3)(abbreviated as BNTLN0.03-BT5)ceramic as a selected system.Subtle structure change caused by annealing treatment,and pronounced phase transition and domain switching by electrical poling,are observed to occur,respectively.The dielectric constant and its strong frequency dispersion in unpoled samples decrease evidently by electrical poling due to electric field-induced ordered domain.The high temperature Maxwell-Wagner relaxor behavior vanishes by annealing treatment due to the loss of electrical inhomogeneity with interface charging effects.Piezoelectric properties are improved evidently by annealing treatment at 900℃,implying a new appropriate method to improve piezoelectric properties.

关 键 词：CERAMICS Dielectric properties FERROELECTRICITY PIEZOELECTRICITY 

分 类 号：TG1[金属学及工艺—金属学]