Glass-ceramic sealants for solid oxide fuel cells: Part I. Physical properties
- Electrochemical Technology Program, Chemical Technology Division, Argonne National Laboratory, Argonne, Illinois 60439-4837 (United States)
A family of sealant materials has been developed for use in the solid oxide fuel cell (SOFC) and in other applications in the temperature range of 800{endash}1000{degree}C. These materials are based on glasses and glass-ceramics in the SrO{endash}La{sub 2}O{sub 3}{endash}Al{sub 2}O{sub 3}{endash}B{sub 2}O{sub 3}{endash}SiO{sub 2} system. The coefficients of thermal expansion (CTE) for these materials are in the range of 8{endash}13{times}10{sup {minus}6}/{degree}C, a good match with those of the SOFC components. These sealant materials bond well with the ceramics of the SOFC and, more importantly, form bonds that can be thermally cycled without failure. At the fuel cell operating temperature, the sealants have viscosities in the range of 10{sup 4}{minus}10{sup 6} Pa-s, which allow them to tolerate a CTE mismatch of about 20{percent} among the bonded substrates. The gas tightness of a sample seal was demonstrated in a simple zirconia-based oxygen concentration cell. {copyright} {ital 1996 Materials Research Society.}
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 285865
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 6 Vol. 11; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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