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
收藏
页码：3338 / 3340
页数：3
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