Metallic interconnection material for solid oxide fuel cell and

Details Metallic interconnection material for solid oxide fuel cell and Metallic interconnection material for solid oxide fuel cell and

1999-07-30

2000-11-21

Bell, Bruce F.

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 34, 429 36, 429123, 429129, 429152, 429158, 429160, 429161, 429210, 419 2, 419 10, 419 19, 419 20, 419 63, 419 64, 419 65, 420416, 420428, 75232, 75233, 75234, 427115, H01M 810

Patent

active

061500488

ABSTRACT:
Disclosed are a metallic interconnection material for solid oxide fuel cells and a preparation method thereof. The metallic interconnection material has two fine microstructural phases in which 5-25% by volume of LaCrO.sub.3 is dispersed at the grain boundaries of Cr particles. It can be prepared by mixing 75-95% by volume of a Cr powder and 5-25% by volume of an LaCrO.sub.3 powder, together with a solvent and a binder, in a mill, molding the mixture into a predetermined shape after drying, and sintering the molded shape at approximately 1,500.degree. C. for 10 hours in an Ar atmosphere with 5 vol % of hydrogen to give an LaCrO.sub.3 -dispersed Cr alloy. The LaCrO.sub.3 -dispersed Cr alloy shows high electric conductivity by virtue of the growth inhibition of Cr particles during sintering and high chemical stability by virtue of the presence of the rare earth metal, La, meeting meet the requirements for the interconnection materials for solid oxide fuel cells.

REFERENCES:
patent: 5132352 (1992-07-01), Richards et al.
patent: 5389456 (1995-02-01), Singh et al.
patent: 5391440 (1995-02-01), Kuo et al.
patent: 5407758 (1995-04-01), Grenier et al.
patent: 5942349 (1999-08-01), Badwal et al.

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