Impedance/dielectric spectroscopy of electroceramics - Part 2: Grain shape effects and local properties of polycrystalline ceramics

N. J. Kidner, Z. J. Homrighaus, B. J. Ingram, Thomas O Mason, E. J. Garboczi

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The reduction of grain size from the microcrystalline regime into the nanocrystalline regime is known to produce significant changes in the transport properties of polycrystalline ceramics. Part 1 of this series described the development of a pixel-based finite-difference "nested-cube model" (NCM), which was used to evaluate existing composite models for the electrical/dielectric properties of polycrystalline ceramics over the entire range of grain core vs. grain boundary volume fractions, from the nanocrystalline regime to the microcrystalline regime. Part 2 addresses grain shape and periodicity effects in such composite modeling, and the extraction of local materials properties (conductivity, dielectric constant) from experimental impedance/dielectric spectroscopy data.

Original languageEnglish
Pages (from-to)293-301
Number of pages9
JournalJournal of Electroceramics
Issue number3
Publication statusPublished - Jul 2005



  • Brick layer model
  • Dielectric
  • Effective medium
  • Impedance
  • Nested cube model

ASJC Scopus subject areas

  • Ceramics and Composites

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