Lead-free NKN-5LT piezoelectric materials for multilayer ceramic actuator

被引：40
|
作者：
Kim, Min-Soo [1 ]
Jeon, Sohyun [1 ]
Lee, Dae-Su [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 ELECTROCERAMICS | 2009年 / 23卷 / 2-4期
关键词：
Lead-free; Piezoelectric; Actuator; ABNORMAL GRAIN-GROWTH; BARIUM-TITANATE;
D O I：
10.1007/s10832-008-9470-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, Li(2)O excess 0.95(Na(0.5)K(0.5))NbO(3)-0.05LiTaO(3) (NKN-5LT) ceramics were developed by conventional sintering process. Sintering temperature was lowered by adding Li(2)O as a sintering aid. Abnormal grain growth in NKN-5LT ceramics was observed with varying Li(2)O content. In the 1 mol% Li(2)O excess NKN-5LT samples sintered at 1000A 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 0.37 and 250 pC/N, respectively. Lead-free piezoelectric ceramic, Li(2)O excess NKN-5LT, multilayer ceramic actuators (MLCA) were fabricated. 10 x 10 x 1 mm(3) size MLCAs were fabricated by conventional tape casting method. The displacement of Li(2)O excess NKN-5LT MLCA with 3 mm thickness was similar to 1 mu m at 150 V.
引用
收藏
页码：372 / 375
页数：4
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