Giant strain in lead-free piezoceramics Bi0.5Na0.5TiO3–BaTiO3–K0.5Na0.5NbO3 system
Giant strain in lead-free piezoceramics Bi0.5Na0.5TiO3–BaTiO3–K0.5Na0.5NbO3 system
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DOI：
10.1063/1.2783200
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发表时间：
2007-09
影响因子：
4
通讯作者：
Shanqing Zhang;A. Kounga;E. Aulbach;H. Ehrenberg;J. Rödel
中科院分区：
文献类型：
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作者：
Shanqing Zhang;A. Kounga;E. Aulbach;H. Ehrenberg;J. Rödel
压电执行器将电能转换为机械能，并用于许多大型应用，例如压电注射器和喷墨打印机。这些器件的性能由电场引起的应变控制。在这里，作者描述了一类无铅 (0.94−x)Bi0.5Na0.5TiO3–0.06BaTiO3–xK0.5Na0.5NbO3 陶瓷的开发。它们可以在单极和双极场载荷下产生巨大的应变（0.45%），甚至高于现有铁电 Pb(Zr,Ti)O3 陶瓷获得的应变，并且与 Pb 基反铁电材料获得的应变相当。
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)Bi0.5Na0.5TiO3–0.06BaTiO3–xK0.5Na0.5NbO3 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)O3 ceramics and is comparable to strains obtained in Pb-based antiferroelectrics.