Effect of Pb Substitution on the Microstructure and Ferroelectric Properties of Ba0.7Sr0.3TiO3 Ceramic

被引：0

作者：

杨卫明 ^{[1
]}

机构：

[1] Department of Electronic Science and Technology,Huazhong University of Science and Technology

来源：

Journal of Wuhan University of Technology(Materials Science) | 2008年 / 23卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Pb substitution; BPST ceramics; microstructure; ferroelectric properties;

D O I：

暂无

中图分类号：

TQ174.1 [基础理论];

学科分类号：

0805 ; 080502 ;

摘要：

Ferroelectric Ba0.7Sr0.3TiO3(BST) and partially Pb2+ substituted for Ba2+ ceramics (Ba0.7-xPbx)Sr0.3TiO3 (x=0.1-0.4,BPST) were prepared by using conventional solid-reaction method.XRD analysis shows that the samples microstructure changes from cubic phase to tetragonal one with the Pb2+ content increasing.ESEM analysis shows that the Pb2+ substituted samples have a denser and more uniform surface morphology than that of pure BST.Measured electrical properties suggest that the Pb2+ substitution for Ba2+ in the BST system enhances the ferroelectric performance obviously when x=0.2.In addition,the substitution increases the samples Curie temperature (Tc).(Ba0.5Pb0.2)Sr0.3TiO3 ceramic has good ferroelectric properties measured at a maximal electric field of 30 kV/cm under the condition of room temperature.The corresponding saturated polarization (Ps),remnant polarization (Pr) and coercive field (Ec) is respectively 15.687 μC/cm2,8.100 μC/cm2 and 6.611 kV/cm.The measured Tc of (Ba0.5Pb0.2)Sr0.3TiO3 is 117 ℃.

引用

页码：874 / 878

页数：5

共 5 条

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