Corrosion resistant ceramic materials

Details Corrosion resistant ceramic materials Corrosion resistant ceramic materials

1995-06-07

1996-07-23

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Separator, retainer or spacer insulating structure

429247, H01M 216

Patent

active

055388108

ABSTRACT:
Ceramic materials which exhibit stability in severely-corrosive environments having high alkali-metal activity, high sulfur/sulfide activity and/or molten halides at temperatures of 200.degree.-550.degree. C. or organic salt (including SO.sub.2 and SO.sub.2 Cl.sub.2) at temperatures of 25.degree.-200.degree. C. These sulfide ceramics form stoichiometric (single-phase) compounds with sulfides of Ca, Li, Na, K, Al, Mg, Si, Y, La, Ce, Ga, Ba, Zr and Sr and show melting-points that are sufficiently low and have excellent wettability with many metals (Fe, Ni, Mo) to easily form metal/ceramic seals. Ceramic compositions are also formulated to adequately match thermal expansion coefficient of adjacent metal components.

REFERENCES:
patent: 238980 (1881-03-01), Spence
patent: 3940472 (1976-02-01), Donohue
patent: 4619792 (1986-10-01), Saunders et al.
patent: 5236691 (1993-08-01), Franzen et al.

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