Piezoelectric and Electeical Properties of Lead-Free (Na0.5K0.5)NbO3-Bi0.5(Na0.80K0.20)0.5TiO3 Ceramics

摘要：

　　Extending the investigations on (Na0.sK0.5)NbO3-based solid solution for lead-free piezoelectric ceramics,this paper consider the complex solid-solution system (Na0.sK0.5)NbO3-Bi0.5(Na0.80K0.20)0.5TiO3 NKN-BNKT.(Na0.5K0.5)NbO3 with 2 ~ 6 mol% Bi0.5(Na0.80K0.20)0.5TiO3 has been prepared following the conventional mixed oxide process.A morphotropic phase boundary (MPB) between orthorhombic (O) and tetragonal (T) was found at the composition 0.97NKN-0.03BNKT with correspondingly enhanced dielectric and piezoelectric properties.The electromechanical coupling factor and dielectric constant are higher for compositions near the MPB.The dielectric constant (εr),planar coupling coefficient (kp) and thickness coupling coefficient (kt)of0.97NKN-0.03BNKT ceramics were 1483,32% and 31%,respectively.

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

作者: C.H.WANG

作者单位: Department of Electronic Engineering, Nan-Jeon Institute of Technology, Tainan, Taiwan, 73746,R.O.C

会议类型: 国际会议

会议名称: the 2011 International Conference on Frontiers of Manufacturing Science and Measuring Technology (第一届制造科学与检测技术国际会议(ICFMM2011))

会议地点: 重庆

会议语种:英文

页码: 12-15

在线出版日期: 2011-06-23（万方平台首次上网日期，不代表论文的发表时间）