Grain boundary effects on piezoelectric properties of the core–shell-structured BaTiO_(3)@TiO_(2) ceramics  

作　　者：Xixi Li Zhonghua Yao Juan Xie Zongxin Li Hua Hao Minghe Cao Amjad Ullah Atta Ullah Abdul Manan Hanxing Liu 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing School of Material Science and Engineering Wuhan University of Technology,Wuhan 430070,P.R.China [2]Department of Physics,University of Science and Technology Bannu,KPK,Pakistan

出　　处：《Journal of Advanced Dielectrics》2018年第6期118-126,共9页先进电介质学报（英文）

基　　金：supported by Natural Science Foundation of China(51872213);the National Key Basic Research Program of China(973 Program,No.:2015CB654601),NSFCGuangdong Joint Funds of the Natural Science Foundation of China(No.U1601209);Technical Innovation Special Program of Hubei Province(2017AHB055).

摘　　要：Grain boundary effect on BaTiO_(3) has been widely investigated for several decades.However,all of them tailored the grain boundary by grain size of BaTiO_(3).In this case,a direct way was introduced to modify the grain boundary by coating technique to investigate the role of grain boundary in ferroelectric materials.Nonferroelectric phase TiO_(2) was employed to investigate grain boundary effects on the electrical properties of BaTiO3 piezoelectric ceramics.TiO_(2) coating can result in the reduction of piezoelectric and ferroelectric properties and the annealing process in oxygen can increase piezoelectric behavior of pure BaTiO3 due to valence state of Ti ions while that remains for Ti-modified composition possibly due to the increased grain boundary effect by impedance analysis.Compared with ferroelectric grain,grain boundary plays a critical role to impact the electrical properties of perovskite-type ferroelectric materials.

关 键 词：Piezoelectric properties ferroelectric properties BaTiO3 and titanates defects 

分 类 号：TG1[金属学及工艺—金属学]