Impact of Phase Structure on Piezoelectric Properties of Textured Lead-Free Ceramics

Xiaoyi Gao; Nannan Dong; Fangquan Xia; Qinghu Guo; Hua Hao; Hanxing Liu; Shujun Zhang

doi:10.3390/cryst10050367

Crystals (May 2020)

Impact of Phase Structure on Piezoelectric Properties of Textured Lead-Free Ceramics

Xiaoyi Gao,
Nannan Dong,
Fangquan Xia,
Qinghu Guo,
Hua Hao,
Hanxing Liu,
Shujun Zhang

Affiliations

Xiaoyi Gao: State Key Lab Silicate Materials for Architecture, Center for Smart Materials and Device Integration, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Nannan Dong: State Key Lab Silicate Materials for Architecture, Center for Smart Materials and Device Integration, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Fangquan Xia: School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
Qinghu Guo: State Key Lab Silicate Materials for Architecture, Center for Smart Materials and Device Integration, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Hua Hao: State Key Lab Silicate Materials for Architecture, Center for Smart Materials and Device Integration, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Hanxing Liu: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Shujun Zhang: Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, Wollongong, NSW 2500, Australia

DOI: https://doi.org/10.3390/cryst10050367
Journal volume & issue: Vol. 10, no. 5
p. 367

Abstract

Read online

The impact of phase structure on piezoelectric performances of textured Na0.5Bi0.5TiO3 (NBT) based lead-free ceramics was studied, including 0.88NBT-0.08K0.5Bi0.5TiO3-0.04BaTiO3 (88NBT) with morphotropic phase boundary (MPB) composition and 0.90NBT-0.07K0.5Bi0.5TiO3-0.03BaTiO3 (90NBT) with rhombohedral phase. Both textured ceramics exhibit a high Lotgering factor, being on the order of f~96%. The piezoelectric coefficients of the textured 88NBT and 90NBT ceramics are increased by 20% and 60%, respectively, comparing to their randomly oriented ceramics. The piezoelectric enhancement of 90NBT textured ceramic is three times higher than 88NBT, revealing the phase structure plays a significant role in enhancing the piezoelectric performances of textured ceramics. Of particular significance is that the 90NBT textured ceramic exhibits almost hysteresis-free strain behavior. The enhanced piezoelectric property with minimal strain hysteresis is attributed to the poled rhombohedral engineered domain configuration.

Published in Crystals

ISSN: 2073-4352 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Crystallography
Website: http://www.mdpi.com/journal/crystals/

About the journal

Abstract

Keywords