Sintering aid for lanthanum chromite refractories. [As interconnect layer between electrodes in fuel cells]
An electronically conductive interconnect layer for use in a fuel cell or other electrolytic device is formed with sintering additives to permit densification in a monolithic structure with the electrode materials. Additions, including an oxide of boron and a eutectic forming composition of Group 2A metal fluorides with Group 3B metal fluorides and Group 2A metal oxides with Group 6B metal oxides, lower the required firing temperature of lanthanum chromite to permit densification to in excess of 94% of theoretical density without degradation of electrode material lamina. The monolithic structure is formed by tape casting thin layers of electrode, interconnect and electrolyte materials and sintering the green lamina together under common densification conditions.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Dept. of Energy
- Patent Number(s):
- 4,749,632
- Application Number:
- 06/922,429, ON: DE88000837
- OSTI ID:
- 6094830
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CHROMIUM OXIDES
SINTERING
FUEL CELLS
LAYERS
LANTHANUM OXIDES
ADDITIVES
BORON OXIDES
FLUORIDES
OXIDES
REFRACTORIES
BORON COMPOUNDS
CHALCOGENIDES
CHROMIUM COMPOUNDS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
FABRICATION
FLUORINE COMPOUNDS
HALIDES
HALOGEN COMPOUNDS
LANTHANUM COMPOUNDS
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
300503* - Fuel Cells- Materials
Components
& Auxiliaries