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

fYear

2007

fDate

27-31 May 2007

Firstpage

662

Lastpage

664

Abstract

Density (1-x)(Na_0.5K_0.5)NbO_3-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 k_p = 0.32-0.38. The effect of LiTaO₃(LT) doped on the piezoelectric properties of (Na_0.5Ko_0.5)NbO₃ (NKN) ceramics was also discussed.

Keywords

dielectric losses; ferroelectric transitions; lithium compounds; materials preparation; permittivity; piezoceramics; piezoelectricity; potassium compounds; sodium compounds; (Na_0.5K_0.5)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;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on

Conference_Location

Nara

ISSN

1099-4734

Print_ISBN

978-1-4244-1334-8

Electronic_ISBN

1099-4734

Type

conf

DOI

10.1109/ISAF.2007.4393362

Filename

4393362