Microstructure and electrical properties in W/Nb co-doped Aurivillius phase Bi4Ti3O12 piezoelectric ceramics

被引：75

作者：

Peng, Zhihang ^{[1
]}

Chen, Qiang ^{[1
]}

Chen, Yu ^{[2
]}

Xiao, Dingquan ^{[1
]}

Zhu, Jianguo ^{[1
]}

机构：

[1] Sichuan Univ, Coll Mat Sci & Engn, Chengdu 610064, Peoples R China

[2] Sichuan Univ, Sch Aeronaut & Astronaut, Chengdu 610065, Peoples R China

来源：

MATERIALS RESEARCH BULLETIN | 2014年 / 59卷

基金：

中国国家自然科学基金;

关键词：

Ceramics; Layered compounds; Piezoelectricity; Dielectric properties; Ferroelectricity; BISMUTH TITANATE; TEMPERATURE; CONDUCTIVITY; DONOR;

D O I：

10.1016/j.materresbull.2014.07.002

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Aurivillius-type Bi4Ti3-xWx/2Nbx/2O12 ceramics were prepared by a conventional solid-state sintering method. The XRD patterns demonstrated that all compositions were a single three layered crystalline structure, involving a reduction of lattice distortion with an increase in W/Nb doping level. The electrical properties including dielectric, electrical conduction and piezoelectric properties were tailored by W/Nb additives. The Curie-temperature decreased, whereas the electrical resistivity drastically increased with introduction of W/Nb donor dopants. As a result, a high electric field can be applied during the poling process. The Bi4Ti2.9W0.05Nb0.05O12 ceramics exhibited optimum piezoelectric coefficient (d(33) similar to 22.8 pC/N), large remnant polarization (2P(r) similar to 26.8 mu C/cm(2) @ 200 degrees C) together with a high Curie temperature (T-c similar to 635 degrees C). Furthermore, this composition possessed a wide sintering window with outstanding piezoelectric properties. These parameters indicate that Bi4Ti2.9W0.05Nb0.05O12-based ceramic is a promising candidate for high temperature piezoelectric applications. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：125 / 130

页数：6

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