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Structural contribution to the ferroelectric fatigue in lead zirconate titanate ceramics

机译:钛酸锆钛酸铅陶瓷中结构对铁电疲劳的影响

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摘要

Many ferroelectric devices are based on doped lead zirconate titanate (PZT) ceramics with compositions near the morphotropic phase boundary (MPB), at which the relevant material's properties approach their maximum. Based on a synchrotron x-ray diffraction study of MPB PZT, bulk fatigue is unambiguously found to arise from a less effective field induced tetragonal-to-monoclinic transformation, at which the degradation of the polarization flipping is detected by a less intense and more diffuse anomaly in the atomic displacement parameter of lead. The time dependence of the ferroelectric response on a structural level down to 250 μs confirms this interpretation in the time scale of the piezolectric strain response.
机译:许多铁电器件均基于掺杂锆钛酸铅钛酸盐(PZT)陶瓷,其成分接近同相相界(MPB),此时相关材料的性能接近其最大值。根据对MPB PZT的同步加速器X射线衍射研究,明确地发现,大块疲劳是由较低效的磁场诱导的四方-单斜相转变引起的,在该情况下,极化翻转的退化可通过强度较小和扩散程度较大的方法来检测。铅原子位移参数异常。铁电响应在低至250μs的结构水平上的时间依赖性在压电应变响应的时间尺度上证实了这一解释。

著录项

  • 来源
    《Physical review》 |2014年第9期|094113.1-094113.7|共7页
  • 作者单位

    School of Materials Science and Engineering, University of New South Wales, NSW, Australia,Institut fuer Angewandte Materialien-Energiespeichersysteme, Karlsruher Institut fuer Technologie,76344 Eggenstein-Leopoldshafen, Germany;

    Institut Charles Gerhardt UMR CNRS 5253 Equipe C_2M, Universite Montpellier Ⅱ, Place Eugene Bataillon, cc1504,34095 Montpellier cedex 5, France;

    Institut Charles Gerhardt UMR CNRS 5253 Equipe C_2M, Universite Montpellier Ⅱ, Place Eugene Bataillon, cc1504,34095 Montpellier cedex 5, France;

    Institut Charles Gerhardt UMR CNRS 5253 Equipe C_2M, Universite Montpellier Ⅱ, Place Eugene Bataillon, cc1504,34095 Montpellier cedex 5, France;

    School of Materials Science and Engineering, University of New South Wales, NSW, Australia;

    Institut fuer Angewandte Materialien-Energiespeichersysteme, Karlsruher Institut fuer Technologie,76344 Eggenstein-Leopoldshafen, Germany;

    Institut fuer Werkstoffwissenschaft, Technische Universitaet Dresden, 01062 Dresden, Germany;

    School of Materials Science and Engineering, University of New South Wales, NSW, Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    piezoelectricity and electromechanical effects; switching phenomena;

    机译:压电和机电效应;切换现象;

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