Bi2O3掺杂Sr0.92Ca0.08TiO3基陶瓷结构与介电性能的研究人工晶体中的“非主流”——有机晶体  

Study on Structure and Dielectric Properties of Bi2O3 Doped Sr0.92Ca0.08TiO3-based Ceramics

作　　者：刘杨琼 李红卫 江俊俊 罗静 那文菊 LIU Yangqiong;LI Hongwei;JIANG Junjun;LUO Jing;NA Wenju(Chengdu Hongke Electronic Technology Co., Ltd., Chengdu 610100, China)

机构地区：[1]成都宏科电子科技有限公司,成都610100

出　　处：《人工晶体学报》2020年第3期555-559,共5页Journal of Synthetic Crystals

摘　　要：通过固相反应法以Ca^2+、Bi^3+取代Sr2+制备出Sr0.92-1.5xBixCa0.08TiO3(0.155≤x≤0.195)固溶体,同时加入固定量的MnCO3和ZnO作为改性剂和助烧剂,并通过XRD衍射仪、SEM扫描电镜和LCR分析仪对样品的结构和介电性能进行分析。结果表明,当x≥0.165时陶瓷样品中出现第二相;随着Bi^3+含量的增加,介电常数先增大,后减小,且介质损耗先减小后增大。当x=0.16时,得到介电常数ε=1153、介质损耗tgδ1KHz=3.5×10^-4、绝缘强度Eb=9.37 kV/mm的高介低损耗的高压电容器陶瓷介质材料。Sr0.92-1.5xBixCa0.08TiO3(0.155≤x≤0.195)solid solution was prepared by solid state reaction method,and fixed amounts of MnCO3 and ZnO were added as modifiers and sintering aids.The structure and dielectric properties were investigated by XRD,SEM and LCR analyser.The results show that when x≥0.165,a second phase appeares in the ceramic samples.With the increase of Bi^3+content,the dielectric constant increases first,then decreases,and the dielectric loss decreases first,then increases.When x=0.16,the capacitor ceramic dielectric material with high dielectric constant(ε=1153),low loss(tgδ1KHz=3.5×10^-4)and high insulation strength(Eb=9.37 kV/mm).

关 键 词：SRTIO3 介电性能 低损耗 高压电容器 陶瓷介电材料 

分 类 号：TM281[一般工业技术—材料科学与工程]