| 산화물 고체전해질의 입계전도 |
| 이종흔 |
| 고려대학교 신소재공학부 |
| Grain-Boundary Conduction in Solid Oxide Electrolyte |
| Jong-Heun Lee |
| Department of Materials Science and Engineering, Korea University |
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| ABSTRACT |
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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 treatment. |
| Key words:
Grain-boundary conduction, Solid oxide electrolyte, Scavenging, Irnpedance spectroscopy, Solide oxide fuel cell |
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