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

Brandt, David R. J. and Acosta, Matias and Koruza, Jurij and Webber, Kyle G. (2014):
Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics.
In: Journal of Applied Physics, pp. 204107(1-7), 115, (20), ISSN 0021-8979, [Online-Edition: http://dx.doi.org/10.1063/1.4879395],
[Article]

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(Ba0.7Ca0.3)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− x Ti x )O3 and Bi1/2 Na 1/2TiO3–based ceramics for electric fields up to 2 kV/mm.

Item Type: Article
Erschienen: 2014
Creators: Brandt, David R. J. and Acosta, Matias and Koruza, Jurij and Webber, Kyle G.
Title: Mechanical constitutive behavior and exceptional blocking force of lead-free BZT-xBCT piezoceramics
Language: English
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(Ba0.7Ca0.3)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− x Ti x )O3 and Bi1/2 Na 1/2TiO3–based ceramics for electric fields up to 2 kV/mm.

Journal or Publication Title: Journal of Applied Physics
Volume: 115
Number: 20
Uncontrolled Keywords: Piezoelectric fields; Piezoelectric transducers; Stress strain relations; Ferroelectric materials; Piezoelectric devices
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties > Subproject D6: The effect of electric field-induced phase transitions on the blocking force in lead-free ferroelectrics
11 Department of Materials and Earth Sciences > Material Science
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue > D - Component properties
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres > CRC 595: Electrical fatigue
11 Department of Materials and Earth Sciences
Zentrale Einrichtungen
DFG-Collaborative Research Centres (incl. Transregio) > Collaborative Research Centres
DFG-Collaborative Research Centres (incl. Transregio)
Date Deposited: 08 Jul 2014 08:32
Official URL: http://dx.doi.org/10.1063/1.4879395
Additional Information:

SFB 595 D6

Identification Number: doi:10.1063/1.4879395
Funders: This work was supported by the Deutsche Forschungsgemeinschaft through the Sonderforschungsbereich 595/D6 “Electrical Fatigue in Functional Materials” and the AdRIA Hesse state center for Adaptronics.
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