Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics

David R.J. Brandt; Matias Acosta; Jurij Koruza; Kyle G. Webber

doi:10.1063/1.4879395

Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics

David R.J. Brandt, Matias Acosta, Jurij Koruza, Kyle G. Webber^*

^*Corresponding author for this work

Institute of Materials Science, Joining and Forming (3030)

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

Abstract

The free strain during unipolar electrical activation and the blocking stress are important figures of merit for actuator applications. The lead-free (1 - x)Ba(Zr_0.2Ti_0.8)O₃-x(Ba _0.7Ca_0.3)TiO₃ (BZT-xBCT) system has been shown to display exceptional unipolar strain at room temperature, making it very attractive as an electroactive material for large displacement, low frequency actuation systems. In this work, the temperature- and composition-dependent blocking stress is measured with the proportional loading method. It was found that BZT-xBCT outperformed Pb(Zr_1-xTi_x)O₃ and Bi_1/2Na_1/2TiO₃-based ceramics for electric fields up to 2 kV/mm.

Original language	English
Article number	204107
Journal	Journal of Applied Physics
Volume	115
Issue number	20
DOIs	https://doi.org/10.1063/1.4879395
Publication status	Published - 28 May 2014

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics",

abstract = "The free strain during unipolar electrical activation and the blocking stress are important figures of merit for actuator applications. The lead-free (1 - x)Ba(Zr0.2Ti0.8)O3-x(Ba 0.7Ca0.3)TiO3 (BZT-xBCT) system has been shown to display exceptional unipolar strain at room temperature, making it very attractive as an electroactive material for large displacement, low frequency actuation systems. In this work, the temperature- and composition-dependent blocking stress is measured with the proportional loading method. It was found that BZT-xBCT outperformed Pb(Zr1-xTix)O3 and Bi1/2Na1/2TiO3-based ceramics for electric fields up to 2 kV/mm.",

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AU - Brandt, David R.J.

AU - Acosta, Matias

AU - Koruza, Jurij

AU - Webber, Kyle G.

PY - 2014/5/28

Y1 - 2014/5/28

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AB - The free strain during unipolar electrical activation and the blocking stress are important figures of merit for actuator applications. The lead-free (1 - x)Ba(Zr0.2Ti0.8)O3-x(Ba 0.7Ca0.3)TiO3 (BZT-xBCT) system has been shown to display exceptional unipolar strain at room temperature, making it very attractive as an electroactive material for large displacement, low frequency actuation systems. In this work, the temperature- and composition-dependent blocking stress is measured with the proportional loading method. It was found that BZT-xBCT outperformed Pb(Zr1-xTix)O3 and Bi1/2Na1/2TiO3-based ceramics for electric fields up to 2 kV/mm.

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Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics

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