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Temperature-dependent ferroelastic switching of soft lead zirconate titanate

Webber, Kyle G. and Aulbach, Emil and Key, T. and Marsilius, Mie and Granzow, Torsten and Rödel, Jürgen (2009):
Temperature-dependent ferroelastic switching of soft lead zirconate titanate.
In: Acta Materialia, pp. 4614-4623, 57, (15), ISSN 13596454,
[Online-Edition: http://dx.doi.org/10.1016/j.actamat.2009.06.037],
[Article]

Abstract

The longitudinal strain and polarization of a soft polycrystalline ferroelectric ceramic (lead zirconate titanate, PZT) were measured under uniaxial compressive stress at elevated temperatures utilizing a novel testing fixture. Ferroelectric ceramics have not previously been characterized under these conditions due to experimental complexity. In addition to nonlinear macroscopic constitutive behavior, the linear elastic moduli have been measured throughout the loading cycle, allowing for the determination of the relative contributions from the linear and nonlinear ferroelastic behavior as a function of stress and temperature. Experimental results show a strong temperature dependence of ferroelastic switching. The ferroelastic properties of unpoled and poled materials for temperatures up to the Curie point are contrasted with the spontaneous strain, elucidating the role of tetragonality in ferroelastic switching. When thermal changes are considered, marked changes in the maximum strain are observed.

Item Type: Article
Erschienen: 2009
Creators: Webber, Kyle G. and Aulbach, Emil and Key, T. and Marsilius, Mie and Granzow, Torsten and Rödel, Jürgen
Title: Temperature-dependent ferroelastic switching of soft lead zirconate titanate
Language: English
Abstract:

The longitudinal strain and polarization of a soft polycrystalline ferroelectric ceramic (lead zirconate titanate, PZT) were measured under uniaxial compressive stress at elevated temperatures utilizing a novel testing fixture. Ferroelectric ceramics have not previously been characterized under these conditions due to experimental complexity. In addition to nonlinear macroscopic constitutive behavior, the linear elastic moduli have been measured throughout the loading cycle, allowing for the determination of the relative contributions from the linear and nonlinear ferroelastic behavior as a function of stress and temperature. Experimental results show a strong temperature dependence of ferroelastic switching. The ferroelastic properties of unpoled and poled materials for temperatures up to the Curie point are contrasted with the spontaneous strain, elucidating the role of tetragonality in ferroelastic switching. When thermal changes are considered, marked changes in the maximum strain are observed.

Journal or Publication Title: Acta Materialia
Volume: 57
Number: 15
Uncontrolled Keywords: Ferroelasticity; Ferroelectricity; High temperature deformation; Deformation texture
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Elektromechanik von Oxiden
11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
Date Deposited: 18 May 2011 15:19
Official URL: http://dx.doi.org/10.1016/j.actamat.2009.06.037
Identification Number: doi:10.1016/j.actamat.2009.06.037
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