Effect of Nb2O5 Addition on the Electrical and Physical Properties of Lead-Free 0.98(Na0.5K0.5)NbO3-0.02(Na0.5Bi0.5)TiO3 Piezoelectric Ceramics
In this paper, the effects of Nb2O5 addition on the electrical and physical properties of 0.98(Na0.5K0.5)NbO3-0.02(Na0.5Bi0.5)TiO3 were investigated. The 0.98(Na0.5K0.5)NbO3-0.02(Na0.5 Bi0.5)TiO3 0.98NKN-0.02NBT ceramics with the addition of 0~1.5 wt％ Nb2O5 have been prepared following the conventional mixed oxide process. X-ray diffraction analysis revealed that, during sintering, all of the (Na0.5Bi0.5)TiO3 diffuse into the lattice of (Na0.5K0.5)NbO3 to form a solid solution, in which an orthorhombic phase with a perovskite structure was found. For 0.98NKN-0.02NBT ceramics by doping 0.3 wt％ Nb2O5, the poled dielectric constant (K33 T) is 1180. The electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.43 and 0.52, respectively. Our results show that 0.98NKN-0.02NBT with the addition of 0.3 wt％ Nb2O5 is a good lead-free piezoelectric ceramic.
sintering poling dielectric property piezoelectric property
Chun-Huy Wang
Department of Electronic Engineering, Nan-Jeon Institute of Technology, Tainan, Taiwan 73746
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
269-274
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）