Effect of Na2O additions on the sinterability and piezoelectric properties of lead-free 95(Na0.5K0.5)NbO3-5LiTaO3 ceramics

被引：70

作者：

Kim, Min-Soo ^{[1
]}

Lee, Dae-Su ^{[1
]}

Park, Eon-Cheol ^{[1
]}

Jeong, Soon-Jong ^{[1
]}

Song, Jae-Sung ^{[1
]}

机构：

[1] Korea Electrotechnol Res Inst, Elect & Magnet Devices Grp, Chang Won 641120, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2007年 / 27卷 / 13-15期

关键词：

sintering; microstructure; piezoelectric properties; niobates; tantalates;

D O I：

10.1016/j.jeurceramsoc.2007.02.194

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, Na2O excess 95(Na0.5K0.5)NbO3-5LiTaO(3) (NKN-5LT) ceramics were developed by conventional sintering process. Sintering temperature was lowered by adding Na2O as a sintering aid. Abnormal grain growth in NKN-5LT ceramics was observed with varying Na2O contents. This grain growth behavior was explained in terms of interface reaction-controlled nucleation and growth. The electrical properties of NKN-5LT ceramics were investigated as a function of Na2O concentration. In the 1 mol% Na2O excess NKN-5LT samples sintered at 1050 degrees C for 4 h in air, electromechanical coupling factor and piezoelectric constant of NKN-5LT ceramics were found to reach the highest values of 0.43 and 230 pC/N, respectively. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：4121 / 4124

页数：4

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