Sintering aid for lanthanum chromite refractories

Details Sintering aid for lanthanum chromite refractories Sintering aid for lanthanum chromite refractories

1986-10-23

1988-06-07

Hearn, Brian E.

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 33, 501152, H01M 800, C04B 3505

Patent

active

047496320

ABSTRACT:
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.

REFERENCES:
patent: 4054627 (1977-10-01), Ownby
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patent: 4476196 (1984-10-01), Poeppel et al.
patent: 4476197 (1984-10-01), Herceg
patent: 4476198 (1984-10-01), Ackerman et al.
patent: 4477541 (1984-10-01), Fraioli
patent: 4510212 (1985-04-01), Fraioli

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