The effects of CuO-doping on dielectric and piezoelectric properties of Bi0.5Na0.5TiO3-Ba(Zr,Ti)O3lead-free ceramics

H. Y. Tian; Kin Wing Kwok; H. L.W. Chan; C. E. Buckley

doi:10.1007/s10853-007-2005-z

The effects of CuO-doping on dielectric and piezoelectric properties of Bi_0.5Na_0.5TiO₃-Ba(Zr,Ti)O₃lead-free ceramics

H. Y. Tian, Kin Wing Kwok, H. L.W. Chan, C. E. Buckley

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

27 Citations (Scopus)

Abstract

CuO-doped lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT) and barium zirconate titanate (Ba(Zr0.07Ti0.93)O3, BZT) were prepared via a multi-step solid-state reaction process. The BNT-BZT with CuO dopant ceramics sintered at 1150-1180 °C for 2 h in air showed a pure perovskite structure. SEM images reveal that a small amount of CuO (<2 mol%) play a significant role on the microstructure to improve its sintering attributes, while it will degrade when the dopant is added beyond 2 mol%. The dielectric and piezoelectric properties of CuO-doped BNT-BZT ceramics were evaluated. At room temperature, the sample doped with 2 mol% CuO shows quite good properties such as a high piezoelectric constant (d33∼ 156.5 pC/N) and a high electromechanical coupling factor (kt∼ 52%). The depolarization temperature increased dramatically and the maximum permittivity temperature decreased slightly.

Original language	English
Pages (from-to)	9750-9755
Number of pages	6
Journal	Journal of Materials Science
Volume	42
Issue number	23
DOIs	https://doi.org/10.1007/s10853-007-2005-z
Publication status	Published - 1 Dec 2007

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1007/s10853-007-2005-z

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title = "The effects of CuO-doping on dielectric and piezoelectric properties of Bi0.5Na0.5TiO3-Ba(Zr,Ti)O3lead-free ceramics",

abstract = "CuO-doped lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT) and barium zirconate titanate (Ba(Zr0.07Ti0.93)O3, BZT) were prepared via a multi-step solid-state reaction process. The BNT-BZT with CuO dopant ceramics sintered at 1150-1180 °C for 2 h in air showed a pure perovskite structure. SEM images reveal that a small amount of CuO (<2 mol%) play a significant role on the microstructure to improve its sintering attributes, while it will degrade when the dopant is added beyond 2 mol%. The dielectric and piezoelectric properties of CuO-doped BNT-BZT ceramics were evaluated. At room temperature, the sample doped with 2 mol% CuO shows quite good properties such as a high piezoelectric constant (d33∼ 156.5 pC/N) and a high electromechanical coupling factor (kt∼ 52%). The depolarization temperature increased dramatically and the maximum permittivity temperature decreased slightly.",

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AU - Tian, H. Y.

AU - Kwok, Kin Wing

AU - Chan, H. L.W.

AU - Buckley, C. E.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - CuO-doped lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT) and barium zirconate titanate (Ba(Zr0.07Ti0.93)O3, BZT) were prepared via a multi-step solid-state reaction process. The BNT-BZT with CuO dopant ceramics sintered at 1150-1180 °C for 2 h in air showed a pure perovskite structure. SEM images reveal that a small amount of CuO (<2 mol%) play a significant role on the microstructure to improve its sintering attributes, while it will degrade when the dopant is added beyond 2 mol%. The dielectric and piezoelectric properties of CuO-doped BNT-BZT ceramics were evaluated. At room temperature, the sample doped with 2 mol% CuO shows quite good properties such as a high piezoelectric constant (d33∼ 156.5 pC/N) and a high electromechanical coupling factor (kt∼ 52%). The depolarization temperature increased dramatically and the maximum permittivity temperature decreased slightly.

AB - CuO-doped lead-free ceramics based on bismuth sodium titanate (Bi0.5Na0.5TiO3, BNT) and barium zirconate titanate (Ba(Zr0.07Ti0.93)O3, BZT) were prepared via a multi-step solid-state reaction process. The BNT-BZT with CuO dopant ceramics sintered at 1150-1180 °C for 2 h in air showed a pure perovskite structure. SEM images reveal that a small amount of CuO (<2 mol%) play a significant role on the microstructure to improve its sintering attributes, while it will degrade when the dopant is added beyond 2 mol%. The dielectric and piezoelectric properties of CuO-doped BNT-BZT ceramics were evaluated. At room temperature, the sample doped with 2 mol% CuO shows quite good properties such as a high piezoelectric constant (d33∼ 156.5 pC/N) and a high electromechanical coupling factor (kt∼ 52%). The depolarization temperature increased dramatically and the maximum permittivity temperature decreased slightly.

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The effects of CuO-doping on dielectric and piezoelectric properties of Bi_0.5Na_0.5TiO₃-Ba(Zr,Ti)O₃lead-free ceramics

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