Giant strain in lead-free piezoceramics Bi0.5Na0.5TiO3-BaTiO3-K0.5Na0.5NbO3 system

被引：830
作者：
Zhang, Shan-Tao
Kounga, Alain Brice
Aulbach, Emil
Ehrenberg, Helmut
Roedel, Juergen
机构：
[1] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany
[2] Leibniz Inst Festkorper & Werksffforchung Dresden, IWF, D-01069 Dresden, Germany
来源：
APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 11期
关键词：
D O I：
10.1063/1.2783200
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Piezoelectric actuators convert electrical into mechanical energy and are implemented for many large-scale applications such as piezoinjectors and ink jet printers. The performance of these devices is governed by the electric-field-induced strain. Here, the authors describe the development of a class of lead-free (0.94-x)Bi0.5Na0.5TiO3-0.06BaTiO(3)-xK(0.5)Na(0.5)NbO(3) ceramics. These can deliver a giant strain (0.45%) under both unipolar and bipolar field loadings, which is even higher than the strain obtained with established ferroelectric Pb(Zr,Ti)O-3 ceramics and is comparable to strains obtained in Pb-based antiferroelectrics.
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