Ultrahigh Electromechanical Coupling and Its Thermal Stability in (Na1/2Bi1/2)TiO3-Based Lead-Free Single Crystals

Authors

Chao Chen
Li YangFollow
Xingan Jiang
Xiaokun Huang
Xiaoyi Gao, University of Wollongong
Na Tu
Kaizheng Shu
Xiangping Jiang
Shujun Zhang, University of WollongongFollow
Haosu Luo

RIS ID

143695

Publication Details

Chen, C., Yang, L., Jiang, X., Huang, X., Gao, X., Tu, N., Shu, K., Jiang, X., Zhang, S. & Luo, H. (2020). Ultrahigh Electromechanical Coupling and Its Thermal Stability in (Na1/2Bi1/2)TiO3-Based Lead-Free Single Crystals. Crystals, 10 (6),

Abstract

© 2020 by the authors. Licensee MDPI, Basel, Switzerland. In this work, we report the ultrahigh electromechanical coupling performance of NBT-6BT-KNN lead-free single crystal at room temperature. The thickness mode electromechanical coupling coefficient (kt) and the 31 mode electromechanical coupling coefficient (k31) reach 69.0% and 45.7%, respectively, which are superior to the PZT-5H lead-based ceramics of kt ~ 60% and k31~39%. In addition, the evolution of the crystal structure and domain morphology is revealed by Raman scattering spectra, a polarizing microscope and piezoelectric force microscopy characterization.