钛酸锶铅梯度功能陶瓷的显微结构及介电性能

无机材料学报

钛酸锶铅梯度功能陶瓷的显微结构及介电性能

朱景川¹; 程华容¹; 尹钟大¹; 全在昊²

1. 哈尔滨工业大学材料科学与工程学院, 哈尔滨 150001; 2. 韩国机械研究院材料技术部; 昌原, 庆尚南道641-010韩国

收稿日期:2001-09-06 修回日期:2001-12-03 出版日期:2002-09-20 网络出版日期:2002-09-20

Microstructure and Dielectric Property of Strontium-Lead Titanate Functionally Graded Ceramics

ZHU Jing-Chuan¹; CHENG Hua-Rong¹; YIN Zhong-Da¹; Jeon Jaeho²

1. School of Materials Science and Engineering; Harbin Institute of Technology; Harbin 150001; China;2. Department of Materials Engineering; Korea Institute of Machinery and Materials; Changwon; Kyungna

Received:2001-09-06 Revised:2001-12-03 Published:2002-09-20 Online:2002-09-20

摘要/Abstract

摘要： 采用（Sr_1-xPb_x）TiO₃系列纳米粉末烧结制备了（Sr,Pb）TiO₃系均质与梯度介电功能陶瓷材料,考察了其组成分布、显微结构及介电性能.结果表明,烧结后陶瓷基本致密化,晶粒有所长大（平均粒径约为6.3μm）,其中存在少量圆形封闭气孔;均质陶瓷中Sr和Ph元素分布均匀,梯度陶瓷中则呈阶梯状梯度变化;烧结前后陶瓷相结构明显改变,由原来的立方顺电相为主转变为四方铁电相为主,并存在铁电畴亚结构;梯度化组成有效地优化了（Sr,Pb）TiO₃陶瓷的介电性能,工作温度区间及介温稳定性明显改善.

关键词: 钛酸锶铅, 功能梯度材料, 显微结构, 介电性能

Abstract: A series of (Sr, Pb)TiO₃ system dielectric ceramics with homogeneous and functionally graded compositions were fabricated by sintering process using
chemically-coprecipitated (Sr_1-xPb_x)TiO₃ nano-particles, and their compositional distribution, microstructure and dielectric property were investigated
as well. The results indicate that, the ceramics are nearly densified and their grains coarse somewhat (mean size is about 6.3μm) after sintering. There are
a small number of sealed pores in the ceramics. In homogeneous ceramics, Sr and Pb distribute evenly, while in graded ceramics Sr and Pb vary gradually. The major
phase constituent obviously transforms from cubic paraelectric phase to tetragonal ferroelectric phase after sintering, in which the ferroelectric domains exist.
The graded constitution effectively optimizes the dielectric property of (Sr, Pb)TiO₃ceramics; the work temperature zone is broadened and the dielectric-temperature stability is improved obviously.

Key words: strontium-lead titanate, functionally graded materials, microstructure, dielectric property

中图分类号:

TB321

朱景川,程华容,尹钟大,全在昊. 钛酸锶铅梯度功能陶瓷的显微结构及介电性能[J]. 无机材料学报.

ZHU Jing-Chuan,CHENG Hua-Rong,YIN Zhong-Da,Jeon Jaeho. Microstructure and Dielectric Property of Strontium-Lead Titanate Functionally Graded Ceramics[J]. Journal of Inorganic Materials.

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