Piezoelectric properties of (Na0.5K0.5-xLix)NbO3 ceramics

被引：0
|
作者：
Qi, Peng [1 ]
Wang, Jinfeng [1 ]
Ming, Baoquan [1 ]
Du, Juan [1 ]
Liang, Xinghua [1 ]
Zheng, Limei [1 ]
机构：
[1] Shandong Univ, Sch Phys, Jinan 250100, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2007年 / 23卷 / 06期
关键词：
lead-free; piezoelectric; dielectric; morphotropic phase boundary;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Lead-free piezoelectric ceramics (Na0.5K0.5-xLix)NbO3 (x=0.057-0.066) were synthesized by an ordinary sintering technique. Substituting Li for K can lead to structural distortion, which improves the Curie temperature (T-C) greatly. By adding appropriate LiNbO3 content, piezoelectric constant d(33) values reach 202-212 pC/N. Electromechanical coefficients of the planar mode reach 44.4%-46.8%. The dielectric loss is below 2.6%, which is much lower than reported (about 50%). The T-C of (Na0.5K0.5-xLix)NbO3 (x=0.057-0.066) is in the range of 490-510 degrees C, at least 70 degrees C higher than that of pure (Na0.5K0.5)NbO3 ceramics. The results show that (Na0.5K0.5-xLix)NbO3 ceramic is a kind of good lead-free high-temperature piezoelectric material.
引用
收藏
页码：833 / 836
页数：4
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