Structure evolution,dielectric,and conductivity behavior of(K_(0.5)Na_(0.5))NbO_(3)-Bi(Zn_(2/3)Nb_(1/3))O_(3) ceramics

作     者：Tianxiang YAN Kaiyuan CHEN Chengqi LI Min LIU Jie WANG Liang FANG Laijun LIU Tianxiang YAN;Kaiyuan CHEN;Chengqi LI;Min LIU;Jie WANG;Liang FANG;Laijun LIU

作者机构：College of Mechanical and Control Engineering&College of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China Institute of Fluid Engineering EquipmentJiangsu Industrial Technology Research InstituteJiangsu UniversityZhenjiang 212013China Key Laboratory for RF Circuits and SystemsMinistry of Education&Key Laboratory of Large Scale Integrated DesignHangzhou Dianzi UniversityHangzhou 310018China 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2021年第10卷第4期

页      面：809-819页

核心收录：

学科分类：080801[工学-电机与电器] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0702[理学-物理学] 

基　　金：supported by the Natural Science Foundation of Guangxi(Grant Nos.2019GXNSFBA245069,AA138162,GA245006,and AA294014) the Middle-aged and Young Teachers’Basic Ability Promotion Project of Guangxi(Grant No.2019KY0290) the Guilin University of Technology(Grant No.GUTQDJJ20176612037) the High Level Innovation Team and Outstanding Scholar Program of Guangxi Institutes the Open Research Program of Key Laboratory of RF Circuit and System,Ministry of Education the Key Laboratory of Large Scale Integrated Design of Zhejiang 

主　　题：ceramic crystal structure dielectric spectroscopy oxygen vacancies 

摘      要：(1-x)K_(0.5)Na_(0.5)Nb0_(3-x)Bi(Zn_(2/3)Nb_(1/3))0_(3)((1-x)KNN-xBZN,x=0.010,0.015,0.020,0.025,and 0.030)lead-free ceramics were fabricated via a traditional solid-state *** crystal structure,microstructure,dielectric,and conductivity behavior of this system were *** with X-ray diffraction(XRD)patterns,Rietveld refinement,and dielectric spectroscopy,an orthorhombic phase was determined for x=0.010,an orthorhombic-tetragonal mixed phase was identified for x=0.015,and a rhombohedral symmetry appears in 0.020≤x≤*** 0.98KNN-0.02BZN and 0.975KNN-0.025BZN ceramics exhibit stable permittivity and low dielectric loss tangent(tan)in wide temperature ranges owing to the combination of rhombohedral-tetragonal step-like feature and the diffuse phase transition from tetragonal to *** activation energies of dielectric relaxation and conductivity behavior at high temperatures initially decrease slightly,then drop sharply,and finally decline slowly,which could be attributed to microstructure morphologies and the concentration of oxygen vacancies.