Effect of poling condition on piezoelectric properties of (K0.5Na0.5)NbO3-LiNbO3 lead-free piezoelectric ceramics

被引：51
作者：
Du, Hongliang [1 ]
Tang, Fusheng
Luo, Fa
Zhou, Wancheng
Qu, Shaobo
Pei, Zhibin
机构：
[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China
[2] Xi An Jiao Tong Univ, Key Lab Educ Minist, Elect Mat Res Lab, Xian 710049, Peoples R China
[3] Air Force Engn Univ, Coll Sci, Xian 710051, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2007年 / 137卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
lead-free; poling condition; piezoelectric properties; (K0.5Na0.5)NbO3-LiNbO3;
D O I：
10.1016/j.mseb.2006.11.020
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Lead-free piezoelectric ceramics 0.94(K0.5Na0.5)NbO3-0.06LiNbO(3) (abbreviated as KNLN6) have been synthesized by traditional ceramics process without cold-isostatic pressing. The phase behavior before poling and after poling was analyzed. The results show that the orthorhombic and tetragonal phase co-exist in KNLN6 ceramics. The effect of poling conditions on piezoelectric properties of KNLN6 ceramics was investigated. The physics mechanism was also discussed. The results show that the optimum poling condition for KNLN6 ceramics is poling electric field of 3.5 kV/mm, poling temperature of 120 degrees C and poling time of 30 min. Piezoelectric properties of KNLN6 ceramics under the optimum poling condition is piezoelectric constant d(33) of 215 pC/N, planar electromechanical coupling factor k(p) of 0.38, thickness electromechanical coupling factor k(t) of 0.48, and Curie temperature T-c of 450 degrees C, respectively. The results show that KNLN6 ceramics is an excellent candidate for lead-free piezoelectric ceramics. (c) 2006 Elsevier B.V. All rights reserved.
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收藏
页码：175 / 179
页数：5
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