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

Crystals

卷:10

Haosu Luo¹  Shujun Zhang²  Xiaoyi Gao²  Li Yang³  Xiaokun Huang³  Xingan Jiang³  Xiangping Jiang³  Kaizheng Shu³  Chao Chen³  Na Tu³ 

[1] Artificial Crystal Research Center, Shanghai Institute of Ceramics, University of Chinese Academy of Sciences, Jiading, Shanghai 200050, China;

[2] Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong, NSW 2500, Australia;

[3] 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;

关键词: lead-free single crystal;    NBT-based;    electromechanical coupling;    phase transition;    domain structure;   

DOI  :  10.3390/cryst10060435

来源: DOAJ

【 摘 要 】

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 (k_t) 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 k_t ~ 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.

【 授权许可】

Unknown