Analysis of elastic strain and crystallographic texture in poled rhombohedral PZT ceramics

D. A. Hall, A. Steuwer, B. Cherdhirunkorn, T. Mori, P. J. Withers

    Research output: Contribution to journalArticlepeer-review

    Abstract

    The elastic strain and crystallographic texture of a rhombohedral lead zirconate titanate ceramic have been characterised in the remanent state, after poling, using high-energy synchrotron X-ray diffraction as a function of the grain orientation ψ relative to the poling direction. It is observed that the (2 0 0) diffraction peak exhibits pronounced shifts as a function of ψ, indicating an elastic lattice strain, while others ({1 1 1}, {1 1 2} and {2 2 0}) show marked changes in intensity as a result of preferred ferroelectric domain orientation. It is shown that the (2 0 0) peak is not affected by the domain switching itself but rather acts like an elastic macrostrain sensor. A simple Eshelby analysis is used to demonstrate that both the elastic strain and texture vary systematically with ψ according to the factor (3cos2 ψ - 1). This angular dependence is evaluated through micromechanics modelling. The physical meaning of the texture variations with ψ is also discussed. © 2006 Acta Materialia Inc.
    Original languageEnglish
    Pages (from-to)3075-3083
    Number of pages8
    JournalActa Materialia
    Volume54
    Issue number11
    DOIs
    Publication statusPublished - Jun 2006

    Keywords

    • Ferroelectricity
    • Internal stresses
    • Piezoelectricity
    • X-ray diffraction

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