硅酸盐学报

非化学计量掺杂对(SmLi)0.04(BiNa)0.46TiO3 陶瓷电性能的影响

作者：孙红梅1 刘笑2 李波3 刘心宇3

单位：1. 绥化学院食品与制药工程学院黑龙江绥化 152061 2. 中南大学粉末冶金研究院长沙 410000 3. 桂林电器科学研究院

关键词：非化学计量储能陶瓷弛豫铁电钛酸铋钠

分类号：TQ174.75

出版年,卷(期):页码：2018,46(9):0-0

DOI：10.14062/j.issn.0454-5648.2018.09.05

摘要：

采用非化学计量的配比制备了(SmLi)0.04(BiNa)0.46TiO3–x%MnCO3(x=0~1.5)无铅铁电陶瓷。结果表明：所有样品的主

晶相均为立方钙钛矿结构。材料制备过程中的A 位离子烧损可以通过锰的掺杂得到补偿，补偿后的样品能够承受176 kV/cm

直流电场。非化学计量比的Mn 使铁–顺电介电峰向高温方向移动，同时打破铁电相的长程有序，呈现弛豫反铁电特征。当

x=1.0 时，B 位键价最大，电滞回线收缩且放电储能密度为0.916 J/cm3。晶粒和晶界两个电学微区主导了整个晶体的电学导

电，而且氧空位电离产生的电子为主要的电荷载体。

基金项目：

作者简介：

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