Enhanced piezoelectric properties and excellent thermal stabilities of cobalt-modified Aurivillius-type calcium bismuth titanate (CaBi4Ti4O15)

被引：48

作者：

Zhao, Tian-Long ^{[1
]}

Wang, Chun-Ming ^{[1
]}

Wang, Chun-Lei ^{[1
]}

Wang, Yi-Ming ^{[1
]}

Dong, Shuxiang ^{[2
]}

机构：

[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

[2] Peking Univ, Dept Mat Sci & Engn, Coll Engn, Beijing 100871, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2015年 / 201卷

基金：

中国国家自然科学基金;

关键词：

Piezoelectric ceramics; Bismuth layer-structured ferroelectrics (BLSFs); High temperature applications; Calcium bismuth titanate (CaBi4Ti4O15); ELECTRICAL-PROPERTIES; CERAMICS;

D O I：

10.1016/j.mseb.2015.08.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bismuth layer-structured ferroelectric (BLSF) calcium bismuth titanate (CaBi4Ti4O15, CBT) piezoelectric ceramics with 0.0-1.0 wt.% cobalt oxide (Co2O3) have been prepared via a conventional solid-state reaction method. Microstructural morphology and electrical properties of cobalt oxide-modified CBT ceramics were investigated in detail. X-ray powder diffraction (XRPD) analysis revealed that the cobalt oxide-modified CBT ceramics have a pure four-layer Aurivillius-type structure. The piezoelectric properties of CBT ceramics were significantly enhanced by cobalt oxide modifications. The piezoelectric coefficient d(33) and Curie temperature T-c, of 0.2 wt.% cobalt oxide-modified CBT ceramics (CBT-Co4) are 14 pC/N and 782 degrees C, respectively. The DC resistivity and thermal depoling behavior at elevated temperature indicated that the CBT-Co4 ceramics exhibit good thermal stability, demonstrating that the CBT-Co4 ceramics are potential materials for high temperature piezoelectric applications. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：51 / 56

页数：6

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