Lanthanum gallate-based sintered body, manufacturing method thereof, and solid oxide fuel cell using the same as solid electrolyte
AssigneeNissan Motor Co., Ltd.
InventorsKenji Furuya, Masaharu Hatano, Kazunori Fujii
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Abstract
A lanthanum gallate-based sintered body comprises a base material formed of lanthanum gallate-based oxide, and grains having a K2NiF4 structure and/or grains having a layered perovskite structure are dispersed into the base material. Consequently, the lanthanum gallate-based sintered body has a high mechanical strength and is excellent in thermal resistance. Further, a SOFC having excellent properties can be obtained by using the lanthanum gallate-based sintered body as the solid electrolyte.
Claims11
A lanthanum gallate-based sintered body, comprising:
- a base material formed of lanthanum gallate-based oxide,
- wherein grains having a K2NiF4 structure and/or grains having a layered perovskite structure are dispersed into the base material.
A method of manufacturing a lanthanum gallate-based sintered body, comprising:
- prefiring a raw material of the lanthanum gallate-based sintered body at a temperature ranging from 1050° C. to 1200° C. inclusive for a time ranging from 2 hours to 10 hours inclusive;
- milling the prefired raw material to prepare raw material powder;
- molding the raw material powder;
- and
- sintering the molded raw material powder to separate a phase formed of lanthanum gallate-based oxide and a phase having a K2NiF4 structure and/or a layered perovskite structure.
A solid oxide fuel cell, comprising:
- a lanthanum gallate-based sintered body including a base material formed of lanthanum gallate-based oxide,
- wherein grains having a K2NiF4 structure and/or grains having a layered perovskite structure are dispersed into the base material.
Dependencies are inferred from the claim text.