Title

Domain disruption and defect accumulation during unipolar electric fatigue in a BZT-BCT ceramic

Campus Units

Materials Science and Engineering

Document Type

Article

Publication Version

Published Version

Publication Date

12-2017

Journal or Book Title

Applied Physics Letters

Volume

111

First Page

252902

DOI

10.1063/1.5008619

Abstract

0.5Ba(Zr0.2Ti0.8)O30.5(Ba0.7Ca0.3)TiO3 (BZT-BCT) is a promising lead-free piezoelectric ceramic with excellent piezoelectric properties (e.g., d33 > 600 pC/N). As potential device applications are considered, the electric fatigue resistance of the ceramic must be evaluated. In this Letter, electric-field in situ transmission electron microscopy is employed to study the microstructural evolution in the BZT-BCT polycrystalline ceramic during unipolar cycling. It is shown that the large ferroelectric domains are disrupted and replaced with accumulated defect clusters and fragmented domains after 5 × 104 unipolar cycles. In this fatigued state, the grain becomes nonresponsive to applied voltages.

Comments

This article is published as Fan, Zhongming, Chao Zhou, Xiaobing Ren, and Xiaoli Tan. "Domain disruption and defect accumulation during unipolar electric fatigue in a BZT-BCT ceramic." Applied Physics Letters 111, no. 25 (2017): 252902. doi: 10.1063/1.5008619. Posted with permission.

Copyright Owner

AIP Publishing LLC

Language

en

File Format

application/pdf

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