High Stability of Dielectric Permittity for K0.5Na0.5NbO3-Based Lead Free Piezoelectric Ceramics

被引：2

作者：

Zhao, Jingbo ^{[1
]}

Qu, Shaobo ^{[1
,2
]}

Du, Hongliang ^{[3
]}

Mo, Weidong ^{[1
]}

Xu, Zhuo ^{[2
]}

Xia, Song ^{[2
]}

Yang, Yiming ^{[1
]}

Yang, Zhen ^{[1
]}

机构：

[1] AF Engn Univ, Coll Sci, Xian 710051, Peoples R China

[2] Xi An Jiao Tong Univ, Educ Minist, Key Lab, Elect Mat Res Lab, Xian 710049, Peoples R China

[3] NW Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

FERROELECTRICS | 2010年 / 404卷

关键词：

Lead-free; dielectric; stability; temperature; ceramics;

D O I：

10.1080/00150193.2010.482848

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new perovskite ferroelectric, Bi(Mg2/3Nb1/3)O-3, was proposed to develop Na0.5K0.5NbO3(KNN)-based lead-free piezoelectric ceramics by an conventional preparation technique. Dielectric stability properties of lead-free K0.5Na0.5NbO3-Bi(Mg2/3Nb1/3)O-3 ceramics were studied. The addition of BMN leads to a polymorphic phase transition between ferroelectric orthorhombic and rhombohedral phases (x = 0.01). 0.03BMN-0.97KNN ceramics show a broad and stable permittivity maximum near 1450 from 25 to 400 degrees C and lower dielectric loss(<= 5%) at broad temperature usage range 25-400 degrees C for diffusion phase transition. The results indicate that this material may have great potential for high temperature capacitors in automobile applications.

引用

页码：226 / 232

页数：7

共 19 条

[1] Origin of high piezoelectric activity in ferroelectric (K0.44Na0.52Li0.04)-(Nb0.84Ta0.1Sb0.06)O3 ceramics [J].