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 language | English |
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Pages (from-to) | 683-689 |
Number of pages | 7 |
Journal | Journal of the Korean Ceramic Society |
Volume | 44 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2007 Dec 31 |
Keywords
- Grain-boundary conduction
- Irnpedance spectroscopy
- Scavenging
- Solid oxide electrolyte
- Solide oxide fuel cell
ASJC Scopus subject areas
- Ceramics and Composites