摘要
采用粉末-溶胶工艺制备了铌酸锶钡/钛酸锶钡(SBN/BST)复相陶瓷。X射线衍射研究表明钨青铜相和钙钛矿相共存于体系中。以Clausius(克劳修斯)-Mosotti(莫索缔)方程为基础,采用混合对数法则、铌酸锶钡和钛酸锶钡的理论极化率建立了SBN/BST的介电常数预测模型。结果表明:通过介电常数预测模型得到的数值与实验测试值相吻合。
(1-x)BaO·xSrO·0.5Nb2O5·0.5TiO2 composite ceramics were prepared throughpowder-sol(P-S) process.X-ray diffraction(XRD) reveals that the tetragonal tungsten bronze phase and the perovskite phase coexist in the ceramics.Based on the Clausius-Mosotti equation,a dielectric constants theory model of barium strontium titanate(BST)/strontium barium niobate(SBN) was established by the theoretical polarizability of BST and SBN.The results show that the experimental test value of dielectric constants is consistent with the calculation value via thetheory model.
出处
《绝缘材料》
CAS
北大核心
2011年第5期59-61,共3页
Insulating Materials
基金
黑龙江省自然科学基金(F200927)
哈尔滨市科技创新人才专项基金资助(2008RFQXG070)
关键词
钙钛矿相
钨青铜相
介电常数模型
粉末-溶胶工艺
perovskite phase
tetragonal tungsten tronze phase
dielectric constants theory model
powder-sol process