Microstructures and piezoelectric properties in the Li2O-Excess 0.95(Na0.5K0.5)NbO3-0.05LiTaO3 ceramics

被引：82

作者：

Kim, Min-Soo ^{[1
]}

Jeong, Soon-Jong ^{[1
]}

Song, Jae-Sung ^{[1
]}

机构：

[1] Korea Electrotechnol Res Inst, Adv Mat & Applicat Res Lab, Chang Won 641120, South Korea

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2007年 / 90卷 / 10期

关键词：

D O I：

10.1111/j.1551-2916.2007.01893.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：

As a candidate for lead-free piezoelectric materials, Li2O-excess 0.95(Na0.5K0.5)NbO3-0.05LiTaO(3) (NKN-5LT) ceramics were developed by a conventional sintering process. The sintering temperature was lowered by adding Li2O as a sintering aid. Abnormal grain growth in NKN-5LT ceramics was observed with varying Li2O content. This grain-growth behavior was explained in terms of interface reaction-controlled nucleation and growth. In the 1 mol% Li2O excess NKN-5LT samples sintered at 1000 degrees C for 4 h in air, the electromechanical coupling factor and the piezoelectric constant of NKN-5LT ceramics were found to reach the highest values of 0.37 and 250 pC/N, respectively.

引用

页码：3338 / 3340

页数：3

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