Role of tetragonal distortion on domain switching and lattice strain of piezoelectrics by in-situ synchrotron diffraction

SCRIPTA MATERIALIA

卷:194

Article

Sun, Shengdong^1,2  Zhang, Yueyun^1,2  Fan, Longlong³  Deng, Shiqing⁴  Gao, Botao^1,2  Ren, Yang⁵  Liu, Hui^1,2,4  Chen, Jun^1,2,4 

[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Dept Phys Chem, Beijing 100083, Peoples R China

[3] Tianjin Normal Univ, Coll Phys & Mat Sci, Tianjin 300387, Peoples R China

[4] Univ Sci & Technol Beijing, Sch Math & Phys, Beijing 100083, Peoples R China

[5] Argonne Natl Lab, Adv Photon Source, Xray Sci Div, Argonne, IL 60439 USA

关键词: Tetragonal distortion;    Piezoelectric ceramics;    Synchrotron radiation;    Domain switching;    Lattice strain;   

DOI  :  10.1016/j.scriptamat.2020.11.012

来源: Elsevier

【 摘 要 】

The tetragonal phase is an indispensable component that plays an important role in forming the morphotropic phase boundary. Herein, the piezoelectric behaviors are systematically investigated in various Pb/Bi-based tetragonal piezoelectric systems as a function of tetragonal distortion using in-situ high-energy synchrotron diffraction. It is found that the tetragonal distortion has a significant influence on piezoelectric properties through constraining the domain switching. Specifically, a critical value of (c/a-1) approximate to 1.5 % is identified, below which the domain switching is significantly activated. The correlation between piezoelectric performance and the cooperative contribution of tetragonal distortion and domain switching has been established: Reducing tetragonal distortion and activating domain switching can enhance the piezoelectric coefficient. Furthermore, an approximate linear coupling between domain switching and lattice strain is confirmed in tetragonal piezoelectric systems. Insights from this work would facilitate the design of high-performance piezoelectrics, by controlling tetragonal distortion and domain switching. (C) 2020 Published by Elsevier Ltd on behalf of Acta Materialia Inc.

【 授权许可】

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