Effect of Bi2O3 Addition on the Electrical and Physical Properties of Lead-Free 0.98(Na0.5K0.5)NbO3-0.02 Ba(Zr0.04Ti0.96)O3 Piezoelectric Ceramics
The 0.98(Na0.5K0.5)NbO3-0.02Ba(Zr0.04Ti0.96)O3 ceramics have been prepared following the conventional mixed oxide process.X-ray diffraction analysis revealed that,during sintering,all of the Ba(Zr0.04Ti0.96)O3 diffuses into the lattice of (Na0.5K0.5)NbO3 to form a solid solution,in which a orthorhombic phase with a perovskite structure was found In order to improve the sinterability of the ceramics,Bi2O3 additions were used as a sintering aid.The electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.3 and 0.55,respectively,at the sintering of 1100℃ for 5 h.For 0.98NKN-0.02BZT ceramics by doping 0.5 wt.% Bi2O3,the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.21 and 0.57,respectively.The ratio of thickness coupling coefficient to planar coupling coefficient is 2.7.
Dielectric properties Piezoelectricity Electrical properties
Chun-Huy Wang
Department of Electronic Engineering, Nan-Jeon Institute of Technology, Tainan, Taiwan 737
国际会议
The Sixth China International Conference on High-Performance Ceramics(第六届中国先进陶瓷国际研讨会(CICC-6))
哈尔滨
英文
413-416
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）