Ferroelectric and dielectric properties of La/Mn co-doped Bi4Ti3O12 ceramics

被引：12

作者：

Wu Yun-Yi ^{[1
]}

Wang Xiao-Hui ^{[1
]}

Li Long-Tu ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

CHINESE PHYSICS B | 2010年 / 19卷 / 03期

基金：

国家高技术研究发展计划(863计划);

关键词：

bismuth titanate; ceramics; doping; ferroelectric; BI3.25LA0.75TI3O12; THIN-FILMS; BISMUTH TITANATE; RAMAN-SPECTROSCOPY; CRYSTAL-STRUCTURE; LA; TEMPERATURE; FATIGUE; MICROSTRUCTURES; POLARIZATION; DEPOSITION;

D O I：

10.1088/1674-1056/19/3/037701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

La/Mn co-doped Bi4Ti3O12 ceramics, Bi3.25La0.75Ti3-xMnxO12 (x = 0.02, 0.04, 0.06, 0.08), were prepared by the solid-state reaction method. The influence of manganese substitution for the titanium part in Bi3.25La0.75Ti3O12 on the sintering behaviour, microstructure, Raman spectra and electrical properties was investigated. The experimental results show that the phase composition of all samples with and without manganese doping, sintered at 1000 degrees C, consists of a single phase with a bismuth-layered structure belonging to the crystalline phase Bi4Ti3O12. There is no evidence of any impurity phase, but a small change in crystallographic orientation is observed. The Curie temperature of Bi3.25La0.75Ti3-xMnxO12 ceramics is steadily shifted to lower temperature with increasing Mn-doping content. Moreover, the remnant polarisation (P-r) of Bi3.25La0.75Ti3-xMnxO12 samples increases with Mn-doping content, and the Bi3.25La0.75Ti2.92Mn0.08O12 sample exhibits the largest P-r of 16.6 mu C/cm(2).

引用

页数：7

共 33 条

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