Piezoelectric properties of K4CuNb8O23 modified (Na0.5K0.5)NbO3 lead-free piezoceramics.

Autor: Chen, Qiang, Chen, Lin, Li, Qishou, Yue, Xi, Xiao, Dingquan, Zhu, Jianguo, Shi, Xiaoluo, Liu, Zhiqian
Předmět:
Zdroj: Journal of Applied Physics; Nov2007, Vol. 102 Issue 10, p104109, 4p, 1 Diagram, 1 Chart, 4 Graphs
Abstrakt: Dense K4CuNb8O23 modified (Na0.5K0.5)NbO3 (NKN:KCN) ceramics were synthesized by using conventional oxide mixing process. The maximum mechanical quality factor Qm of NKN:KCN ceramics reaches up to 1150, the piezoelectric constant d33 and the planar electromechanical coefficient kp still maintain relatively high levels, which are about 100 pC/N and 40%, respectively. Middle frequency (455 kHz) lead-free resonators were fabricated by using NKN:KCN, and remarkable improvements in resonance characteristics were found by KCN doping. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index