Fabrication of lead-free piezoelectric (Na0.5K0.5)NbO3 ceramics by modified solid state reaction method

被引:0
|
作者
Fukada, M. [1 ]
Saito, T. [1 ]
Wada, T. [1 ]
机构
[1] Ryukoku Univ, Dept Chem Mat, Otsu, Shiga 5202194, Japan
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中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Sodium potasium niobate, (Na(0.5)K(0.5))NbO(3), fine powder has been successfully synthesized at a low temperature of 550 degrees C through a modified solid state reaction, in which urea [CO(NH(2))2] plays an important role. High-density (Na0.5K0.5)NbO(3) ceramics can be obtained by a conventional sintering with an addition of 0.03 mol% Co(3)O(4). Their crystal structure, microstructure, and dielectric and piezoelectric properties were characterized. The (Na(0.5)K(0.5))NbO(3) ceramics show a comparatively saturated P-E hysteresis loop. The (Na0.5K0.5)NbO(3) ceramics also show piezoelectricity with a piezoelectric constant, d(33), of 126 pC/N and a planar electromechanical coupling factor, k(p), of 33%..
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页码:687 / 688
页数:2
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