低介电常数无铅高压陶瓷电容器材料  

Lead-free Ceramics Capacitor Materials of Low Dielectric Constant and High Voltage

作　　者：何伟[1] 李斌[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：《材料科学与工程学报》2008年第2期281-283,共3页Journal of Materials Science and Engineering

摘　　要：以钛酸锶铋(SBT)系高压陶瓷电容器材料为主要研究对象,对其掺加不同摩尔百分含量的MgTiO3,通过对陶瓷试样的耐压强度,介电常数,介电损耗等方面的研究分析,所得结果表明:当MgTiO3∶SrTiO3∶Bi2O3·3TiO2=46∶46∶8(摩尔比),烧结温度为1240℃时,可获得材料性能为:Eb≈9.1kV/mm,εr≈374,tanδ≈2×10-4,介电性能较好的低介电常数无铅高压陶瓷电容器材料。SBT based ceramics capacitors of high voltage have been studied in this paper. The experiment aimed to obtain ceramics capacitor material of low dielectric constant and high voltage by doping MgTiO3 of different mol percentage composition. The electric breakdown voltage, dielectric constant and dielectric loss were determined. At last the author got the conclusion as below： when the mol proportion of MgTiO3, SrTiO3 and BizO3 · 3TiOz was 46 ： 46 ： 8, with the sintering temperature at 1240℃, the lead-free material with the main properties that Ebb9. lkV/mm, er≈374 and tanδ≈2 × 10^-4 can be obtained.

关 键 词：高压陶瓷电容器 介电性能 钛酸锶 钛酸镁 低介电常数 

分 类 号：TQ174.75[化学工程—陶瓷工业]