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, T. O. Mason, E. J. Garboczi

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

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
Volume14
Issue number3
DOIs
Publication statusPublished - Jul 1 2005

Keywords

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

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering
  • Materials Chemistry

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