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

Zhongming Fan; Chao Zhou; Xiaobing Ren; Xiaoli Tan

doi:10.1063/1.5008619

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

Zhongming Fan
, Chao Zhou
, Xiaobing Ren
, Xiaoli Tan

Iowa State University

Research output: Contribution to journal › Article › peer-review

26 Scopus citations

Abstract

0.5Ba(Zr_0.2Ti_0.8)O₃0.5(Ba_0.7Ca_0.3)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.

Original language	English
Article number	252902
Journal	Applied Physics Letters
Volume	111
Issue number	25
DOIs	https://doi.org/10.1063/1.5008619
State	Published - 18 Dec 2017

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title = "Domain disruption and defect accumulation during unipolar electric fatigue in a BZT-BCT ceramic",

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.",

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T1 - Domain disruption and defect accumulation during unipolar electric fatigue in a BZT-BCT ceramic

AU - Fan, Zhongming

AU - Zhou, Chao

AU - Ren, Xiaobing

AU - Tan, Xiaoli

PY - 2017/12/18

Y1 - 2017/12/18

N2 - 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.

AB - 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.

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VL - 111

JO - Applied Physics Letters

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ER -

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

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