Dielectric and piezoelectric properties of cerium modified BaBi4Ti4O15 ceramics

被引：75

作者：

Diao, C. L. ^{[1
]}

Xu, J. B. ^{[1
]}

Zheng, H. W. ^{[1
]}

Fang, L. ^{[2
]}

Gu, Y. Z. ^{[1
]}

Zhang, W. F. ^{[1
]}

机构：

[1] Henan Univ, Dept Phys, Key Lab Photovolta Mat Henan Prov, Kaifeng 475004, Peoples R China

[2] Guilin Univ Technol, State Key Lab Breeding Base Nonferrous Met & Char, Guilin 541004, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2013年 / 39卷 / 06期

关键词：

Dielectric properties; BaBi4Ti4O15; ceramics; Piezoelectric materials;

D O I：

10.1016/j.ceramint.2013.02.036

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Cerium modified barium bismuth titanate ceramics BaBi(4)Ti(4)O(15-)xCeO(2) (wt%) were prepared by a solid-state reaction method. X-ray diffraction patterns showed that the ceramics have a four-layer Aurivillius-type structure with orthorhombic phase at room temperature. The plate-like morphology with average grain size about 2 mu m was observed by scanning electron microscope (SEM). The effects of cerium modification on dielectric and piezoelectric properties of BaBi4Ti4O15 ceramics were studied. The results showed that cerium modification enhanced the piezoelectric properties, decreased the temperature of the dielectric maximum (T-m) slightly from 413 degrees C to 406 degrees C and the dielectric loss, tan delta, as well. The modified Curie-Weiss law was used to describe the relaxor behavior of the ceramics and the degree of dielectric relaxation (gamma) firstly increases then decreases with the cerium increasing. The relaxor nature was attributed to the A-site cationic disorder. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：6991 / 6995

页数：5

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