Impedance spectroscopic estimation of inter-granular phase distribution in 15 mol% calcia-stabilized zirconia/alumina composites

Jong Heun Lee, Toshiyuki Mori, Ji Guang Li, Takayasu Ikegami, Satoshi Takenouchi

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

The distribution of inter-granular glass phase in 15 mol% calcia-stabilized zirconia containing 0.3 or 10 μm size Al2O3 was estimated using a series of complex impedance spectra attained by successive removal of outer layers and subsequent measurements. For the instance of fine Al2O3 addition, the grain boundary at the near-surface region became more resistive than that at the center when sintered at T≥155°C, which emanated from the outward expelling of inter-granular phase during grain growth. In comparison, the coarse Al2O3 addition showed the homogeneous distribution of grain-boundary resistivity (ρgb). The ρgb as a function of sample depth could be an effective and sensitive index for determining the distribution of inter-granular phase.

Original languageEnglish
Pages (from-to)13-17
Number of pages5
JournalJournal of the European Ceramic Society
Volume21
Issue number1
DOIs
Publication statusPublished - 2001
Externally publishedYes

Keywords

  • Grain boundaries
  • Impedance spectroscopy
  • Ionic conductivity
  • ZrO

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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