Piezoelectric properties of lithium modified silver niobate perovskite single crystals

被引：43
|
作者：
Fu, Desheng [1 ,2 ]
Endo, Makoto [1 ]
Taniguchi, Hiroki [1 ]
Taniyama, Tomoyasu [1 ]
Koshihara, Shin-ya [2 ,3 ,4 ]
Itoh, Mitsuru [1 ]
机构：
[1] Tokyo Inst Technol, Mat & Struct Lab, Yokohama, Kanagawa 2268503, Japan
[2] Japan Sci & Technol Agcy, ERATO, Chiyoda Ku, Tokyo 1020075, Japan
[3] Tokyo Inst Technol, Frontier Collaborat Res Ctr, Meguro Ku, Tokyo 1528551, Japan
[4] Tokyo Inst Technol, Dept Mat Sci, Meguro Ku, Tokyo 1528551, Japan
来源：
APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 17期
关键词：
D O I：
10.1063/1.2918837
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We report the growth and the piezoelectric properties of lead-free perovskite single crystals of Ag1-xLixNbO3. It possesses a rhombohedral structure with high ferroelectric phase transition (T-c=548 K for x=0.086) and large spontaneous polarization (P-s similar to 40 mu C/cm(2) for x=0.062) along the < 111 >(c) direction of pseudocubic perovskite structure for x>0.05-0.06. High quasistatic d(33)similar to 210 pC/N and low dielectric constant have lead to a very large value of piezoelectric voltage constant g(33)similar to 53.9x10(-3) Vm/N for the < 001 >(c)-cut crystal of this simple perovskite. It has been shown that Li substitution might enhance the piezoelectric coefficient of the crystal. The excellent piezo-/ferroelectricity of this system are considered to be facilitated by the strong polarization nature of both Ag and Li in the perovskite structure. Our findings may stimulate further interests in the development of lead-free piezoelectrics. (C) 2008 American Institute of Physics.
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页数：3
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