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Identification of crystalline elastic anisotropy in PZT ceramics from in-situ blocking stress measurements

Daniel, L. and Hall, D. A. and Webber, Kyle G. and King, A. and Withers, P. J. (2014):
Identification of crystalline elastic anisotropy in PZT ceramics from in-situ blocking stress measurements.
115, In: Journal of Applied Physics, (17), pp. 174102(1-14), ISSN 0021-8979, [Online-Edition: http://dx.doi.org/10.1063/1.4874222],
[Article]

Abstract

High energy x-ray diffraction measurements of lattice strains were performed on a rhombohedral Lead Zirconate Titanate ceramic (PZT 55-45) under combinations of applied electric field and compressive stress. These measurements allow the construction of blocking stress curves for different sets of crystallographic orientations which reflect the single crystal elastic anisotropy. A micro-mechanical interpretation of the results is then proposed. Assuming cubic symmetry for the crystalline elastic stiffness tensor and isotropy for the macroscopic elastic properties, the elastic properties of the single crystal are extracted from the measured data. An anisotropy ratio close to 0.3 is found (compared to 1 for isotropic materials). The high level of anisotropy found in this work suggests that crystalline elastic anisotropy should not be neglected in the modelling of ferroelectric materials.

Item Type: Article
Erschienen: 2014
Creators: Daniel, L. and Hall, D. A. and Webber, Kyle G. and King, A. and Withers, P. J.
Title: Identification of crystalline elastic anisotropy in PZT ceramics from in-situ blocking stress measurements
Language: English
Abstract:

High energy x-ray diffraction measurements of lattice strains were performed on a rhombohedral Lead Zirconate Titanate ceramic (PZT 55-45) under combinations of applied electric field and compressive stress. These measurements allow the construction of blocking stress curves for different sets of crystallographic orientations which reflect the single crystal elastic anisotropy. A micro-mechanical interpretation of the results is then proposed. Assuming cubic symmetry for the crystalline elastic stiffness tensor and isotropy for the macroscopic elastic properties, the elastic properties of the single crystal are extracted from the measured data. An anisotropy ratio close to 0.3 is found (compared to 1 for isotropic materials). The high level of anisotropy found in this work suggests that crystalline elastic anisotropy should not be neglected in the modelling of ferroelectric materials.

Journal or Publication Title: Journal of Applied Physics
Volume: 115
Number: 17
Uncontrolled Keywords: Piezoelectric fields; Elasticity; Anisotropy; Single crystals; X-ray diffraction
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: 12 May 2014 13:42
Official URL: http://dx.doi.org/10.1063/1.4874222
Additional Information:

SFB 595 D6

Identification Number: doi:10.1063/1.4874222
Funders: The authors are grateful for support provided by the ESRF under Grant No. MA-1727, “Ferroelectric-ferroelastic domain switching and the blocking stress in piezoelectric ceramics.” , This work was supported at the University of Manchester by the Engineering and Physical Sciences Research Council (EPSRC) under the Grant No. EP/J010685/1., L.D. gratefully acknowledges sabbatical leave support granted by Univ Paris-Sud. The authors also gratefully acknowledge Andreja Benčan and Barbara Malič for processing the PZT ceramics. , K.G.WK.G.W. would also like to acknowledge the Deutsche Forschungsgemeinschaft (DFG) under SFB 595/D6. . would also like to acknowledge the Deutsche Forschungsgemeinschaft (DFG) under SFB 595/D6.
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