Microstructure and piezoelectric properties of 0.95(Na0.5K0.5)NbO3-0.05SrTiO3 ceramics

被引：56
作者：
Cho, Kyung-Hoon
Park, Hwi-Yeol
Ahn, Cheol-Woo
Nahm, Sahn [1 ]
Uchino, Kenji
Park, Seung-Ho
Lee, Hyeung-Gyu
Lee, Hwack-Joo
机构：
[1] Korea Univ, Dept Mat Sci & Engn, Seoul 136713, South Korea
[2] Penn State Univ, Mat Res Inst, Int Ctr Actuators & Transducers, University Pk, PA 16802 USA
[3] Korea Elect Technol Inst, Gyeonggido 463816, South Korea
[4] New Mat Evaluat Ctr, Korea Res Inst Standards & Sci, Taejon 305600, South Korea
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2007年 / 90卷 / 06期
关键词：
D O I：
10.1111/j.1551-2916.2007.01715.x
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The 0.95(Na0.5K0.5)NbO3-0.05SrTiO(3) (0.95NKN-0.05ST) ceramics formed in this study had a porous microstructure with small grains and low piezoelectric properties due to their low density. However, when a small amount of Na2O was intentionally subtracted from the 0.95NKN-0.05ST ceramics, a liquid phase was formed, which led to increased density and grain size. Piezoelectric properties were also improved for the Na2O-subtracted 0.95NKN-0.05ST ceramics. The increased density and grain size were responsible for the enhancement of the piezoelectric properties. In particular, the 0.95(Na0.49K0.5)NbO2.995-0.05ST ceramics showed high piezoelectric properties of d(33)=220, k(p)=0.4, Q(m)=72, and epsilon(T)(3)/epsilon(o)=1447, thereby demonstrating their promising potential as a candidate material for application to lead-free piezoelectric ceramics.
引用
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页码：1946 / 1949
页数：4
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