An approach to further improve piezoelectric properties of (K0.5Na0.5)NbO3-based lead-free ceramics

被引：132

作者：

Du, Hongliang ^{[1
]}

Zhou, Wancheng

Luo, Fa

Zhu, Dongmei

Qu, Shaobo

Pei, Zhibin

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidification Processing, 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：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 20期

关键词：

19;

D O I：

10.1063/1.2815750

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An approach to further improve piezoelectric properties of (1-x)(K0.5Na0.5)NbO3-xLiNbO(3) (KNLN) ceramics, i.e., the optimum poling temperatures (T-p) of KNLN ceramics should be chosen near the polymorphic phase transition temperatures, is proposed. This is contrary to conventional wisdom associated with electrical poling of ceramics. Piezoelectric constant d(33) of KNLN (x=0.07) ceramics increases from 210 to 274 pC/N by selecting optimum T-p. This result indicates that this approach is very effective in improving piezoelectric properties of KNLN ceramics. Moreover, this approach can also be applied to other (K0.5Na0.5)NbO3 based ceramics. (c) 2007 American Institute of Physics.

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页数：3

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