Study on Phase Structure and Electrical Properties of La-Doped (K0.5Na0.5)0.94Li0.06NbO3 Ceramics

摘要：

Lead-free piezoceramics (K0.5Na0.5)0.943xLi0.06LaxNbO3 were synthesized by the conventional solid-state reaction process. The effect of La-doping on the phase structure and electrical properties of (K0.5Na0.5)0.94Li0.06NbO3 ceramics was investigated. X-ray diffraction analysis showed that the crystal structure of the ceramics changed from coexistence of orthorhombic and tetragonal phases to pseudo-cubic phase with the increase of La-doping level, and the change of phase structure seriously weakened the dielectric, ferroelectric and piezoelectric properties of the ceramics. In addition, it was found that the La-doping improved the density of the ceramics and the ceramics became dense. Meanwhile, the ceramics with La-doping displayed a relative lower loss tangent (tanδ) from room temperature to approximately 350℃.

关键词： KNN Piezoceramics Phase structure Electrical properties

作者: Yong Liu Rui Qing Chu Zhi Jun Xu Qian Chen Lin Shao Kang An Guo Rong Li

作者单位: College of Materials Science and Engineering, Liaocheng University, Liaocheng 252059, China The State Key Lab of High Performance Ceramics and Superfinemicrostructure,Shanghai Institute of Cer

会议类型: 国际会议

会议名称: 2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)

会议地点: 广州

会议语种:英文

页码: 1127-1130

在线出版日期: 2011-11-18（万方平台首次上网日期，不代表论文的发表时间）