Effect of Li2CO3 Addition on the Micstructure and Physical Properties ot Lead-Free (Na0.5K0.5)NbO3-(Na0.5Bi0.5)TiO3 Ceramics

摘要：

　　In this paper,the effects of Li2CO3 addition on the microstructure 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(Na0.5Bi0.5)TiO3 0.98NKN-0.02NBT ceramics with the addition of 0~2.0 wt% Li2CO3 have been prepared following the conventional mixed oxide process.The specimens of 0.98NKN-0.02NBT ceramics added with Li2CO3 maintain an orthorhombic phase.It indicates that the addition of small amounts of Li2CO3 did not give rise to an obvious change in crystal structure.For 0.98NKN-0.02NBT ceramics by doping 0.5 wt% Li2CO3,the poled dielectric constant (K33T) and the electromechanical coupling coefficients of the planar mode kp reach 907 and 0.36,respectively,after sintering at 1100 ℃ for 3 h.Our results show that 0.98NKN-0.02NBT with the addition of 0.5 wt%Li2CO3 is a good lead-free piezoelectric ceramic.

关键词： electromechanical transducer lead-free piezoceramics dielectric property piezoelectric property sintering poling

作者: Chun-Huy Wang

作者单位: Department of Electronic Engineering, Nan-Jeon Institute of Technology, Tainan, Taiwan, R.O.C

会议类型: 国际会议

会议名称: the Second International Conference on Frontiers of Manufacturing and Design Science(第二届制造与设计科学国际会议(ICFMD 2011))

会议地点: 台湾

会议语种:英文

页码: 95-99

在线出版日期: 2011-12-11（万方平台首次上网日期，不代表论文的发表时间）