Piezoelectric and dielectric properties of (Na0.5K0.5)NbO3-Bi0.5(Na0.8K0.2)0.5TiO3 lead-free ceramics

被引：13

作者：

Chen, Zhiwu ^{[1
]}

Hu, Jianqiang ^{[2
]}

He, Xinhua ^{[1
]}

机构：

[1] S China Univ Technol, Coll Mat Sci & Engn, Guangzhou 510640, Peoples R China

[2] S China Univ Technol, Sch Chem Sci, Guangzhou 510640, Peoples R China

来源：

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN | 2008年 / 116卷 / 1353期

关键词：

lead-free; piezoelectric ceramics; morphotropic phase boundary; piezoelectric property; dielectric properties;

D O I：

10.2109/jcersj2.116.661

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Lead-free piezoelectric ceramics (1-x)(Na0.5K0.5)NbO3-xBi0.5(Na0.8K0.2)(0.5)TiO3 (abbreviated as NKN-BNKT100x, with x ranges from 0 to 0.08 mol) have been synthesized by a conventional solid state sintering method. The effects of amount of BNKT-content on electrical properties and crystalline structures have been investigated. X-ray diffraction analysis showed that a morphotropic phase boundaries (MPB) between orthorhombic and tetragonal phases exists in the composition range of 0.05 < x < 0.06, near which the dielectric and piezoelectric properties are enhanced. The NKN-BNKT5 ceramics exhibits good properties (d(33) = 216pC/N, k(p) = 41 %, epsilon(T)(33)/epsilon(0)) = 1315). These results indicate that NKN-BNKT100x ceramic is a promising lead-free piezoelectric candidate material. (C) 2008 The Ceramic Society of Japan. All rights reserved.

引用

页码：661 / 663

页数：3

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