制备工艺对钛酸钡基无铅高压陶瓷电容器材料性能的影响  

Effect of Preparation Technique on BaTiO_3-Base Lead-Free High Voltage Ceramic Capacitor Materials

作　　者：景文斌 李少炳[1] 徐亮[1] 王丽熙[1] 张其土[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《稀有金属》2012年第2期286-291,共6页Chinese Journal of Rare Metals

基　　金：风华高科2010年技术创新招标项目(FH2010RDZ003);江苏高校优势学科建设工程资助项目

摘　　要：以BaTiO3为基料,加入SrTiO3,CaCO3,Bi2O3.3TiO2等制备了(1-z)Ba1-x-ySrxCayTiO3.z(Bi2O3.3TiO2)系无铅高压陶瓷电容器材料,研究了制备工艺对材料性能的影响。结果表明,在保温时间一定的情况下,瓷料的最佳烧结温度取决于组分中Bi2O3.3TiO2含量,且烧结温度随着Bi2O3.3TiO2的含量的增加而降低;在BaTiO3中加入30%SrTiO3,10%CaCO3和3%Bi2O3.3TiO2时(均为摩尔分数),瓷料的最佳烧结温度为1240℃,其εr=3802,tgδ=4.2×10-3,Eb=9.2 kV.mm-1;并且在研究介温性能时,居里温度降低到35℃左右,拓宽了介电峰;当Bi2O3.3TiO2的含量增加到4%时,瓷料的最佳烧结温度为1220℃;在合理的烧结温度范围内,低温烧结和慢速升温将有利于细晶的致密化,从而改善高压陶瓷电容器的综合性能。The SrTiO3,CaCO3 and Bi2O3 · 3TiO2 were added to the BaTiO3-based lead-free high voltage ceramic capacitor materials.And the formula（1-z）（Ba1-x-ySrxCay）TiO3 · z（Bi2O3 · 3Ti03） was gotten,the effect of preparation technology on the dielectric properties were investigated.The results showed that,in certain holding time,the best sintering temperature depended on the content of Bi2O3 · 3TiO2,and it reduced with Bi2O3 · 3TiO2 increasing.The dielectric properties of BaTiO3-based materials with 30%SrTiO3,10%CaCO3 and 3% Bi2O3 · 3TiO2（mole fraction） were： εr =3802,tgδ=4.2×10-3,Eb=9.2 kV · mm-1,the best sintering temperature was 1 240 ℃,and the Curie temperature decreased to 35 ℃,the broadening of the dielectric peaks.When the Bi2O3 · 3TiO2 content increased to 4%,the best sintering temperature was 1220 ℃.In the reasonable temperature range of sintering,low-temperature sintering and rising temperature slowly would benefit the densification of fine grains,thus improving the comprehensive performance of high voltage ceramic capacitor materials.

关 键 词：高压陶瓷电容器 BATIO3陶瓷 烧结 介电性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]