Title :
Piezoelectric Properties of (1-x)(Na0.5K0.5) NbO3-xLiTaO3 Lead-free Piezoelectric Ceramics
Author :
Chen, Lin ; Chen, Qiang ; Huang, Wei ; Li, Qishou ; Xu, Zhuo ; Yue, Xi ; Xiao, Dingquan ; Zhu, Jianguo
Author_Institution :
Sichuan Univ., Chengdu
Abstract :
Density (1-x)(Na0.5K0.5)NbO3-xLiTaO3(NKN-LT) lead-free piezoelectric ceramics have been synthesized by conventional mixing oxide process. A morpho-tropic phase boundary(MPB) between orthorhombic phase and tetragonal phase had been found in NKN-LT system. It was found that the piezoelectric properties of NKN-LT ceramics, at x = 0.065 near MPB, is about d33 = 225 pC/N and the planar electromechanic coupling coefficient kp = 0.32-0.38. The effect of LiTaO3(LT) doped on the piezoelectric properties of (Na0.5Ko0.5)NbO3 (NKN) ceramics was also discussed.
Keywords :
dielectric losses; ferroelectric transitions; lithium compounds; materials preparation; permittivity; piezoceramics; piezoelectricity; potassium compounds; sodium compounds; (Na0.5K0.5)NbO3-LiTaO3; NKN-LT ceramics; conventional mixing oxide process; dielectric losses; dielectric permittivity; electromechanic coupling coefficient; lead-free piezoelectric ceramics; morphotropic phase boundary; orthorhombic phase; phase transition; piezoelectric properties; tetragonal phase; Acoustic measurements; Ceramics; Dielectric measurements; Environmentally friendly manufacturing techniques; Lead compounds; Niobium compounds; Piezoelectric materials; Powders; Scanning electron microscopy; Temperature; (1-x)(Na0.5K0.5) NbO3-xLiTaO3; lead-freel; piezoelectric ceramics;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393362
