Effect of Ta2O5 Addition on the Electrical and Physical Properties of Lead-Free 0.98Nao.sKo.s)Nb03-0.02(Nao.5Bio.5)Ti03 Piezoelectric Ceramics
In this paper, the effects of Ta2O5 addition on the electrical and physical properties of 0.98(Na0.5K0.5)NbO3-0.02(Nao.5Bi0.5)TiO3 were investigated. The 0.98(Na0.5K0.5)NbO3 -0.02(Na0.5Bi0.5)TiO3 0.98NKN-0.02NBT ceramics with the addition of 0-0.5 wt％ Ta2O5 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 a orthorhombic phase with a perovskite structure was found. For 0.98NKN-0.02NBT ceramics by doping 0.1 wt％ Ta2O5, the poled dielectric constant (K33T) is 1090. The electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.39 and 0.48, respectively. Our results show that 0.98NKN-0.02NBT with the addition of 0.1 wt％ is a good lead-free piezoelectric ceramic.
ceramic sintering poling dielectric property piezoelectric property
Chun-Huy Wang
Department of Electronic Engineering.Nan-Jeon Institute of Technology, Tainan, Taiwan, R.O.C.
国际会议
合肥
英文
883-886
2011-09-23（万方平台首次上网日期，不代表论文的发表时间）