METHOD FOR PRODUCING ION-CONDUCTING ORIENTED CERAMIC, AND FUEL CELL USING IONIC CONDUCTOR THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a method for producing an ion-conducting oriented ceramic in which the large-sized ceramic having improved ionic conductivity can be obtained easily although an inexpensive and simple process is adopted therein and to provide a fuel cell in which the ion-conducting oriented ceramics produced by this production method is used as a solid electrolyte and which works in a medium temperature range.

SOLUTION: The method for producing the ion-conducting oriented ceramics comprises "an oxide raw material mixing step S1" of mixing an oxide raw material including lanthanoid oxide powders and oxide powders of at least one of Si and Ge; "a melting/vitrifying step S2" of heating/melting the mixed oxide raw material to obtain a liquid state material, casting the liquid state material and rapidly cooling the cast material to obtain a vitrified material; and "a crystallization step S3" of crystallizing the vitrified material at 800-1,400°C by heat treatment.

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