广东工业大学学报2017，Vol.34Issue(6)：88-92,5.DOI:10.12052/gdutxb.170001
Ba(Ti1-xSnx)O3陶瓷的高温介电弛豫现象与阻抗研究
High-temperature Dielectric Relaxation and Impedance Analysis of BaTi1-xSnxO3Ceramics
摘要
Abstract
BaTi1-xSnxO3(x=0.02,0.10,0.15,0.25) ceramics were synthesized by the traditional solid state reaction method.XRD spectrum shows that all sample is tetragonal phase.With the increase of Sn4+/Ti4+ molar ratio,Curie temperature of all compositions will drop a little.When x value range 0.02 to 0.15,the impedance spectrum analysis shows that the sample resistance may be mainly ascribed to grain boundary.While for composition of x=0.25,the response from grain can not be ignored.Through analyzing the dielectric spectrum and impedance spectroscopy,the values of activation energy calculated from conduction were lower than that calculated from impedance measurements.The results suggest that the relaxation process of BaTi1-xSnxO3 ceramics is dominated by a dipolar conduction.The conduction mechanism can be explained by thermal dynamic process of oxygen vacancy.关键词
高温介电弛豫/阻抗/传导机理Key words
high-temperature dielectric relaxation/impedance/conduction mechanism分类
数理科学引用本文复制引用
黄广,刘秋香..Ba(Ti1-xSnx)O3陶瓷的高温介电弛豫现象与阻抗研究[J].广东工业大学学报,2017,34(6):88-92,5.基金项目
广东省自然科学基金资助项目(2016A030313718) （2016A030313718）
