Defect structure, ferroelectricity and piezoelectricity in Fe/Mn/Cu-doped K0.5Na0.5NbO3 lead-free piezoelectric ceramics

Tao Wang; Dongmei Wang; You Liao; Qiaoji Zheng; Hailing Sun; K. W. Kwok; Na Jiang; Wenjing Jie; Chenggang Xu; Dunmin Lin

doi:10.1016/j.jeurceramsoc.2018.07.019

Defect structure, ferroelectricity and piezoelectricity in Fe/Mn/Cu-doped K_0.5Na_0.5NbO₃ lead-free piezoelectric ceramics

Tao Wang
, Dongmei Wang
, You Liao
, Qiaoji Zheng
, Hailing Sun
, K. W. Kwok
, Na Jiang
, Wenjing Jie
, Chenggang Xu
, Dunmin Lin

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

83 Citations (Scopus)

Abstract

For perovskite Pb-based ceramics, outstanding hardening piezoelectric properties can be easily induced by acceptor dopings of Fe, Mn or Cu, but in this work, completely different hardening effects are observed in Fe/Mn/Cu-doped K_0.5Na_0.5NbO₃ ceramics. Pure K_0.5Na_0.5NbO₃ exhibits a well-saturated single P-E loop, giving low Q_m of 72. Fe₂O₃-doped ceramic exhibits the combined effects of dominant donor and slight acceptor, giving a slightly slanted single P-E loop and relatively low Q_m of 156. For MnO₂-doped ceramic, moderate hardening properties with a slightly pinched P-E loop and relatively high Q_m of 370 are exhibited. Unlike Fe₂O₃ and MnO₂-doped ceramics, a double P-E loop and superhigh Q_m of 1965 are obtained in CuO-doped ceramic. The defect structure and corresponding microscopic mechanisms in the ceramics have been systematically investigated. Our study shows that defect characteristics should be responsible for distinct hardening properties in Fe, Mn and Cu-doped K_0.5Na_0.5NbO₃ materials.

Original language	English
Pages (from-to)	4915-4921
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	38
Issue number	15
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2018.07.019
Publication status	Published - 1 Dec 2018

Keywords

Acceptor doping
Defect structure
Hardening properties
Piezoelectric ceramics

ASJC Scopus subject areas

Ceramics and Composites
Materials Chemistry

More information

10.1016/j.jeurceramsoc.2018.07.019

Cite this

@article{090b69088581406c8bd3212917c519da,

title = "Defect structure, ferroelectricity and piezoelectricity in Fe/Mn/Cu-doped K0.5Na0.5NbO3 lead-free piezoelectric ceramics",

abstract = "For perovskite Pb-based ceramics, outstanding hardening piezoelectric properties can be easily induced by acceptor dopings of Fe, Mn or Cu, but in this work, completely different hardening effects are observed in Fe/Mn/Cu-doped K0.5Na0.5NbO3 ceramics. Pure K0.5Na0.5NbO3 exhibits a well-saturated single P-E loop, giving low Qm of 72. Fe2O3-doped ceramic exhibits the combined effects of dominant donor and slight acceptor, giving a slightly slanted single P-E loop and relatively low Qm of 156. For MnO2-doped ceramic, moderate hardening properties with a slightly pinched P-E loop and relatively high Qm of 370 are exhibited. Unlike Fe2O3 and MnO2-doped ceramics, a double P-E loop and superhigh Qm of 1965 are obtained in CuO-doped ceramic. The defect structure and corresponding microscopic mechanisms in the ceramics have been systematically investigated. Our study shows that defect characteristics should be responsible for distinct hardening properties in Fe, Mn and Cu-doped K0.5Na0.5NbO3 materials.",

keywords = "Acceptor doping, Defect structure, Hardening properties, Piezoelectric ceramics",

author = "Tao Wang and Dongmei Wang and You Liao and Qiaoji Zheng and Hailing Sun and Kwok, \{K. W.\} and Na Jiang and Wenjing Jie and Chenggang Xu and Dunmin Lin",

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TY - JOUR

T1 - Defect structure, ferroelectricity and piezoelectricity in Fe/Mn/Cu-doped K0.5Na0.5NbO3 lead-free piezoelectric ceramics

AU - Wang, Tao

AU - Wang, Dongmei

AU - Liao, You

AU - Zheng, Qiaoji

AU - Sun, Hailing

AU - Kwok, K. W.

AU - Jiang, Na

AU - Jie, Wenjing

AU - Xu, Chenggang

AU - Lin, Dunmin

PY - 2018/12/1

Y1 - 2018/12/1

N2 - For perovskite Pb-based ceramics, outstanding hardening piezoelectric properties can be easily induced by acceptor dopings of Fe, Mn or Cu, but in this work, completely different hardening effects are observed in Fe/Mn/Cu-doped K0.5Na0.5NbO3 ceramics. Pure K0.5Na0.5NbO3 exhibits a well-saturated single P-E loop, giving low Qm of 72. Fe2O3-doped ceramic exhibits the combined effects of dominant donor and slight acceptor, giving a slightly slanted single P-E loop and relatively low Qm of 156. For MnO2-doped ceramic, moderate hardening properties with a slightly pinched P-E loop and relatively high Qm of 370 are exhibited. Unlike Fe2O3 and MnO2-doped ceramics, a double P-E loop and superhigh Qm of 1965 are obtained in CuO-doped ceramic. The defect structure and corresponding microscopic mechanisms in the ceramics have been systematically investigated. Our study shows that defect characteristics should be responsible for distinct hardening properties in Fe, Mn and Cu-doped K0.5Na0.5NbO3 materials.

AB - For perovskite Pb-based ceramics, outstanding hardening piezoelectric properties can be easily induced by acceptor dopings of Fe, Mn or Cu, but in this work, completely different hardening effects are observed in Fe/Mn/Cu-doped K0.5Na0.5NbO3 ceramics. Pure K0.5Na0.5NbO3 exhibits a well-saturated single P-E loop, giving low Qm of 72. Fe2O3-doped ceramic exhibits the combined effects of dominant donor and slight acceptor, giving a slightly slanted single P-E loop and relatively low Qm of 156. For MnO2-doped ceramic, moderate hardening properties with a slightly pinched P-E loop and relatively high Qm of 370 are exhibited. Unlike Fe2O3 and MnO2-doped ceramics, a double P-E loop and superhigh Qm of 1965 are obtained in CuO-doped ceramic. The defect structure and corresponding microscopic mechanisms in the ceramics have been systematically investigated. Our study shows that defect characteristics should be responsible for distinct hardening properties in Fe, Mn and Cu-doped K0.5Na0.5NbO3 materials.

KW - Acceptor doping

KW - Defect structure

KW - Hardening properties

KW - Piezoelectric ceramics

UR - https://www.scopus.com/pages/publications/85050074209

U2 - 10.1016/j.jeurceramsoc.2018.07.019

DO - 10.1016/j.jeurceramsoc.2018.07.019

M3 - Journal article

AN - SCOPUS:85050074209

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JO - Journal of the European Ceramic Society

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