Structure and electrical properties of La_(2)O_(3)-doped(K,Na,Li)(Nb,Ta)O_(3)-(Bi,Na)TiO_(3) ceramics  

作　　者：Bingsen Wang Junjun Wang Jiaqi Li Miao Yang Minghao Huang Tianyi Ma Yu Tian Fengmin Wu 

机构地区：[1]School of Science,Harbin University of Science and Technology Harbin 150080,P.R.China [2]School of Measurment and Communication Engineering Harbin University of Science and Technology,Harbin 150080,P.R.China

出　　处：《Journal of Advanced Dielectrics》2023年第2期57-62,共6页先进电介质学报（英文）

基　　金：supported by the Student’s Platform for Innovation and Entrepreneurship Training Program of Heilongjiang Province under Grant No.202110214057;the Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures(Nanjing University of Aeronautics and Astronautics)under Grant No.MCMS-E-0522G04).

摘　　要：In this paper,Lead-free based on 0.97(K_(0.48)Na_(0.48)Li_(0.04))(Nb_(0.8)Ta0.2)O_(3)-0.03Bi_(0.5)Na_(0.5)TiO_(3) with additives La_(2)O_(3)(1,2,3,4 wt.%)was prepared by the solid reaction method,and the effect of La dopant on the structural and electrical properties is investigated.The result indicates La dopant considerably decreases the optical band gap compared to the undoped composition.On the other hand,La doping leads to the higher dielectric property in a wider temperature,providing possibilities and directions for the subsequent development of ferroelectric photovoltaic materials with electrical properties and low optical band gap in a dramatical manner.

关 键 词：Piezoelectric ceramics KNNLT-BNT dielectric properties band gap 

分 类 号：TQ174.1[化学工程—陶瓷工业]