Sintering characteristic, microstructure, and dielectric relaxor behavior of (K0.5Na0.5)NbO3-(Bi0.5Na0.5)TiO3 lead-free ceramics

被引：96

作者：

Du, Hongliang ^{[1
]}

Zhou, Wancheng ^{[1
]}

Zhu, Dongmei ^{[1
]}

Fa, Luo ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2008年 / 91卷 / 09期

关键词：

D O I：

10.1111/j.1551-2916.2008.02528.x

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：

Highly dense lead-free ceramics (1-x)(K0.5Na0.5)NbO3-x(Bi0.5Na0.5)TiO3 [(1-x)KNN-xBNT] have been synthesized by pressureless sintering owing to the careful control of processing conditions. The densification of (1-x)KNN-xBNT ceramics improves with increasing addition of BNT. The translucence is observed in 0.96 KNN-0.04 BNT ceramics. Diffuse phase transition and frequency dispersion of the dielectric constant, which are two typical characteristics for relaxor ferroelectrics, are observed in (1-x)KNN-xBNT ceramics. Dielectric relaxor behavior obeys a modified Curie-Weiss law. In addition, (1-x)KNN-xBNT ceramics possess a high Curie temperature (> 320 degrees C). The results indicate that (1-x)KNN-xBNT (x = 0.06) ceramics are promising lead-free candidate relaxor ferroelectrics for high-temperature applications.

引用

页码：2903 / 2909

页数：7

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