Compositions: ceramic – Ceramic compositions
Patent
1993-03-10
1995-10-03
Bell, Mark L.
Compositions: ceramic
Ceramic compositions
423263, 423269, 4235611, 4235662, 4235663, 423562, 252387, 428698, C01G 112, C01B 1742
Patent
active
054552060
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: 4136233 (1979-01-01), Eisenberg
patent: 4176170 (1979-11-01), Kasper et al.
patent: 4208474 (1980-07-01), Jacobson et al.
patent: 4331750 (1982-05-01), Malugani et al.
patent: 4542108 (1985-09-01), Susman et al.
patent: 4942144 (1990-07-01), Martin
CA 99(8): 6253x-"Structures of CaAl.sub.2 S.sub.4, CaGa.sub.2 S.sub.4, SrAl.sub.2 S.sub.y, SrGa.sub.2 S.sub.y, and BaIn.sub.2 S.sub.y " Eisenmann et al, Rev. Chim. Miner., 20(2), 255-63, 1983, no month, abstract only.
Bell Mark L.
Bonner C. M.
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