Grain orientation dependent superelasticity in ferroelectrics for enhanced electromechanical properties
Abstract
The practical application of ferroelectric ceramics is limited by their inherent electromechanical property constraints. Superelasticity, characterized by considerable recoverable strain and piezoelectric coefficient in ferroelectrics, offers a promising solution for advanced actuators and sensors. However, the complex electromechanical coupling effects caused by different oriented grains pose challenges for implementing superelasticity in ferroelectric ceramics. This paper elucidates that superelasticity is prominently exhibited within small orientation regimes but becomes suppressed as the orientation increases. Grain orientation affects electromechanical properties: Young's modulus abruptly drops from 91 to 3 GPa near the superelastic transition at the orientation angle of 0°, while it stabilizes around the intrinsic modulus at 45°. The peak piezoelectric coefficient reaches 5000 pC/N near the transition at 0°, exceeding the previously reported values by an order of magnitude. The proposed grain orientation-centered mechanism of superelasticity offers valuable theoretical support for designing ferroelectric devices with grain distributions, particularly in textured ceramics.
Article Details
Journal Info
Applied Physics Letters
American Institute of Physics
Authors (10)
Xuhui Lou
MoE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University 1 , Chengdu, Sichuan 610065,
Boyu Zuo
MoE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University 1 , Chengdu, Sichuan 610065,
Xu Hou
State Key Laboratory of Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering
Xu-Sheng Yang
Department of Industrial and Systems Engineering, Research Institute for Advanced Manufacturing, The Hong Kong Polytechnic University 3 , Hung Hom, Kowloon, Hong Kong,
Wentao Jiang
School of Physical Science and Technology, Shanghai Key Laboratory of High-Resolution Electron Microscopy, State Key Laboratory of Advanced Medical Materials and Devices
Qingyuan Wang
Department of Physics
Haidong Fan
Department of Mechanics & Engineering, Sichuan University 2 , Chengdu, Sichuan 610065,
Jie Wang
State Key Laboratory of Molecular Oncology, Beijing Key Laboratory, CAMS Key Laboratory of Translational Research on Lung Cancer, Department of Medical Oncology Cancer Hospital, Chinese Academy of Medical Sciences Beijing China
Ying Liang
Xiaobao Tian
MoE Key Laboratory of Deep Earth Science and Engineering, College of Architecture and Environment, Sichuan University 1 , Chengdu, Sichuan 610065,