Simultaneously enhanced piezoelectric properties and depolarization temperature in calcium doped BiFeO3-BaTiO3 ceramics

被引：26

作者：

Wang, Jun ^{[1
,2
]}

Zhou, Changrong ^{[1
,2
]}

Li, Qingning ^{[1
]}

Yang, Ling ^{[1
]}

Xu, Jiwen ^{[1
,2
]}

Chen, Guohua ^{[1
,2
]}

Yuan, Changlai ^{[1
,2
]}

Rao, Guanghui ^{[1
,2
]}

机构：

[1] Guilin Univ Elect Technol, Guangxi Key Lab Informat Mat, Guilin 541004, Guangxi, Peoples R China

[2] Guilin Univ Elect Technol, Sch Mat Sci & Engn, Guilin 541004, Guangxi, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 748卷

关键词：

High-temperature piezoceramics; Bismuth ferrite; Relaxor ferroelectrics; Depolarization; LEAD-FREE PIEZOCERAMICS; ELECTRICAL-PROPERTIES; STRAIN; BIFEO3; ZN; LA;

D O I：

10.1016/j.jallcom.2018.03.174

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Polycrystalline piezoelectric ceramics 0.7Bi(1-x)Ca(x)FeO(3)-0.3BaTiO(3) (BCxF-BT) were fabricated by the solid state reaction route. Effects of Ca doping on microstructures, electrical properties and their temperature dependence were investigated systematically. The results show that Ca doping has little influence on crystal structure, while significant grain growth takes place. Improved piezoelectric properties with d(33) = 168 pC/N, k(p) = 0.28 and S-max = 0.146%, concurrently with high temperature stability (T-d = 420 degrees C and T-m = 438 degrees C) are obtained for 0.75% Ca doped ceramics. The high degree poling induced domain texture and improved stability of long-range ferroelectric state at high temperature may be responsible for the enhanced piezoelectric properties and depolarization temperature respectively. The results indicate that Ca doped BCxF-BT lead-free piezoceramics are intriguing for applications in high-temperature sensor and actuator. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：758 / 765

页数：8

共 41 条

[1] Temperature- and Frequency-Dependent Properties of the 0.75Bi1/2Na1/2TiO3-0.25SrTiO3 Lead-Free Incipient Piezoceramic [J].