Dielectric, ferroelectric and piezoelectric properties of Bi0.5Na0.5TiO3-(Ba0.7Ca0.3)TiO3 ceramics at morphotropic phase boundary composition

被引：27

作者：

Yang, Jingna ^{[1
]}

Liu, Peng ^{[1
]}

Bian, Xiaobing ^{[1
]}

Jing, Huixia ^{[1
]}

Wang, Yajuan ^{[1
]}

Zhang, Yu ^{[1
]}

Wu, Yi ^{[1
]}

Song, Wuhui ^{[1
]}

机构：

[1] Shaanxi Normal Univ, Coll Phys & Informat Technol, Xian 710062, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2011年 / 176卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Bi0.5Na0.5TiO3; Morphotropic phase boundary; Dielectric; Ferroelectric; Piezoelectric; ELECTRICAL-PROPERTIES; POLARIZATION ROTATION; BARIUM-TITANATE; SYSTEM; TEMPERATURE; CRYSTALS; BEHAVIOR;

D O I：

10.1016/j.mseb.2010.12.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

(1 - x)Bi0.5Na0.5TiO3-x(Ba0.7Ca0.3)TiO3 (BNT-xBCT, 0 <= x <= 0.15) solid solutions have been synthesized by a conventional solid state sintering method for obtaining a morphotropic phase boundary (MPB) with good piezoelectric properties. X-ray diffraction patterns reveal that a MPB of rhombohedral and tetragonal phases is formed at compositions 0.09 <= x <= 0.12. Addition of BCT into BNT greatly lowered coercive field E-c without degrading remanent polarization P. The specimen with x = 0.09 has the good piezoelectric properties: d(33) = 125 pC/N and k(p) = 0.33. A modified Curie-Weiss law was used to fit the dielectric constant of BNT-xBCT ceramics, and a frequency dispersion was observed during the phase transitions from antiferroelectric to paraelectric in specimens with x exceeding 0.06. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.

引用

页码：260 / 265

页数：6