Ultrahigh Electromechanical Coupling and Its Thermal Stability in (Na<sub>1/2</sub>Bi<sub>1/2</sub>)TiO<sub>3</sub>-Based Lead-Free Single Crystals
Chao Chen,
Li Yang,
Xingan Jiang,
Xiaokun Huang,
Xiaoyi Gao,
Na Tu,
Kaizheng Shu,
Xiangping Jiang,
Shujun Zhang,
Haosu Luo
Affiliations
Chao Chen
Jiangxi Key Laboratory of Advanced Ceramic Materials, National Engineering Research Center for Domestic & Building Ceramics, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China
Li Yang
Jiangxi Key Laboratory of Advanced Ceramic Materials, National Engineering Research Center for Domestic & Building Ceramics, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China
Xingan Jiang
Jiangxi Key Laboratory of Advanced Ceramic Materials, National Engineering Research Center for Domestic & Building Ceramics, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China
Xiaokun Huang
Jiangxi Key Laboratory of Advanced Ceramic Materials, National Engineering Research Center for Domestic & Building Ceramics, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China
Xiaoyi Gao
Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong 2500, Australia
Na Tu
Jiangxi Key Laboratory of Advanced Ceramic Materials, National Engineering Research Center for Domestic & Building Ceramics, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China
Kaizheng Shu
Jiangxi Key Laboratory of Advanced Ceramic Materials, National Engineering Research Center for Domestic & Building Ceramics, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China
Xiangping Jiang
Jiangxi Key Laboratory of Advanced Ceramic Materials, National Engineering Research Center for Domestic & Building Ceramics, School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China
Shujun Zhang
Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong 2500, Australia
Haosu Luo
Artificial Crystal Research Center, Shanghai Institute of Ceramics, University of Chinese Academy of Sciences, Jiading, Shanghai 200050, China
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.
