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^*

^*Korrespondierende/r Autor/-in für diese Arbeit

Institut für Werkstoffkunde, Fügetechnik und Umformtechnik (3030)

Publikation: Beitrag in einer Fachzeitschrift › Artikel › Begutachtung

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.

Originalsprache	englisch
Aufsatznummer	204107
Fachzeitschrift	Journal of Applied Physics
Jahrgang	115
Ausgabenummer	20
DOIs	https://doi.org/10.1063/1.4879395
Publikationsstatus	Veröffentlicht - 28 Mai 2014

ASJC Scopus subject areas

Allgemeine Physik und Astronomie

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10.1063/1.4879395

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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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