Piezoelectric and Dielectric Properties of [(NaxK(1–x))0.985Bi0.015](Nb0.97Ti0.03)O3 Ceramics

doi:10.3724/SP.J.1077.2013.12257

Journal of Inorganic Materials ›› 2013, Vol. 28 ›› Issue (3): 326-330.DOI: 10.3724/SP.J.1077.2013.12257

• Research Paper • Previous Articles Next Articles

Piezoelectric and Dielectric Properties of [(Na_xK(1–x))_0.985Bi_0.015](Nb_0.97Ti_0.03)O₃ Ceramics

JIANG Xiang-Ping, YI Wen-Bin, CHEN Chao, TU Na, LI Xiao-Hong, ZHAN Hong-Quan

(Jiangxi Key Laboratory of Advanced Ceramic Materials, Department of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333001, China)

Received:2012-04-23 Revised:2012-05-27 Published:2013-03-20 Online:2013-02-20
Supported by:
National Natural Science Foundation of China (51262009, 51062005, 91022027); Natural Science Foundation of Jiangxi Province (2010GQW0037, 2010GQW0038, 20114BAB216018, 20122BAB202001); Foundation of Training Academic and Technical Leaders for Main Majors of Jiangxi Province (2010DD00800); Colleges and Universities “Advanced Ceramics” Scientific and Technological Innovation Team of Jiangxi Province; Foundation of Jiangxi Provincial Department of Education (GJJ11204, GJJ10226, GJJ12488)

Abstract

Abstract: [(Na_xK(1–x))_0.985Bi_0.015](Nb_0.97Ti_0.03)O₃ (x=0.40–0.65) lead-free piezoelectric ceramics were synthesized by solid-state reaction method. The influences of different x value on the phase structure, microstructure, piezoelectric and dielectric properties of samples were studied in detail. The results indicate that all samples possess pure perovskite structure and the Curie temperature of all samples are in the temperature range of 340–365℃. The ceramic sample with x=0.40 is in the tetragonal symmetry at room temperature and with the increase of x content, the phase structure of samples change gradually from pure tetragonal phase to coexistence of tetragonal and orthorhombic phase, while the ceramic sample with x=0.65 has tetragonal phase. The polymorphic phase transition (PPT) from orthorhombic to tetragonal symmetry near room temperature locates in the composition of 0.45≤x≤0.63 in which the ceramic samples possess relatively high piezoelectric activity. The ceramic sample (x=0.60) with optimum piezoelectric properties (d₃₃=253 pC/N, k_p=0.43, T_C=359℃) is a promising lead-free piezoelectric material.

Key words: potassium sodium niobate, polymorphic phase transition, piezoelectric properties, dielectric properties

CLC Number:

TQ174

JIANG Xiang-Ping, YI Wen-Bin, CHEN Chao, TU Na, LI Xiao-Hong, ZHAN Hong-Quan. Piezoelectric and Dielectric Properties of [(Na_xK(1–x))_0.985Bi_0.015](Nb_0.97Ti_0.03)O₃ Ceramics[J]. Journal of Inorganic Materials, 2013, 28(3): 326-330.

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Piezoelectric and Dielectric Properties of [(Na_xK(1–x))_0.985Bi_0.015](Nb_0.97Ti_0.03)O₃ Ceramics

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