Dielectric and Piezoelectric Properties of Textured Lead-Free Na0.5Bi0.5TiO3-Based Ceramics

Crystals

Shujun Zhang¹  Fangquan Xia²  Nannan Dong³  Xiaoyi Gao³  Hua Hao³  Hanxing Liu⁴ 

[1] Institute for Superconducting and Electronic Materials, Australian Institute of Innovative Materials, University of Wollongong, NSW 2500, Australia;School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China;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;State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Center for Smart Materials and Device Integration, International School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;

关键词: textured ceramics;    template grain growth;    piezoelectric materials;    electrical conductivity;   

DOI  :  10.3390/cryst9040206

来源: DOAJ

【 摘 要 】

This work provides a comparative study of the dielectric and piezoelectric properties of randomly oriented and textured 0.88Na_0.5Bi_0.5TiO₃-0.08K_0.5Bi_0.5TiO₃-0.04BaTiO₃ (88NBT) ceramics. Textured ceramics were fabricated by template grain growth (TGG) method using NaNbO₃ (NN) for templates. For textured ceramics with 4 wt% NN templates, a Lotgering factor of 96% and piezoelectric coefficient d₃₃ of 185 pC/N were obtained. Compared to the randomly oriented ceramics, textured ceramics show lower strain hysteresis (H = 7.6%), higher unipolar strain of 0.041% with corresponding large signal piezoelectric coefficient d₃₃^* of 200 pm/V at applied field of 2 kV/mm. This enhancement can be explained by the grain orientation along <001> direction by texturing, where an engineered domain configuration is formed after polarization, leading to decreased hysteresis and increased piezoelectric property.

【 授权许可】

Unknown