Grain-boundary conduction in solid oxide electrolyte

Research output: Contribution to journalArticle

Abstract

Grain-boundary conduction in the fluorite-structure solid oxide electrolytes such as acceptor-doped zirconia and ceria were reviewed. The siliceous impurity, even several hundreds ppm, affects the ionic conduction across grain boundary to a great extent. Various approaches to improve grain-boundary conduction in fluorite-structure oxide electrolytes have been investigated, which include (1) the scavenging of siliceous phase by the reaction with second phase, (2) the gathering of intergranular siliceous phase into a discrete configuration and (3) the dewetting of intergranular liquid phase by post-sintering heat treatmtent.

Original languageEnglish
Pages (from-to)683-689
Number of pages7
JournalJournal of the Korean Ceramic Society
Volume44
Issue number12
Publication statusPublished - 2007 Dec 31

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Keywords

  • Grain-boundary conduction
  • Irnpedance spectroscopy
  • Scavenging
  • Solid oxide electrolyte
  • Solide oxide fuel cell

ASJC Scopus subject areas

  • Ceramics and Composites

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