Specialized metallurgical processes – compositions for use therei – Processes – Free metal or alloy reductant contains magnesium
Patent
1992-06-12
1993-11-16
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Free metal or alloy reductant contains magnesium
75230, C22C 2900
Patent
active
052619443
ABSTRACT:
A nickel cermet contains 35-70% by weight of a metal nickel phase and 65-30% by weight of a zirconia phase stabilized in the cubic form with yttria, with, on X-ray diffraction analysis, said phases appearing as distinct and homogeneously distributed at a level lower than 1 .mu.m.
This nickel cermet is obtained by preparing an aqueous solution containing a heat-decomposable zirconyl, yttrium and nickel salt, and an organic hydroxyacid or aminoacid, or a poly(acrylic acid); removing water from the resulting solution, under conditions of absence, or substantial absence, of decomposition phenomena, in order to separate a porous solid; calcining the porous solid, and reducing with hydrogen the product from calcination.
The nickel cermet obtained in this way is useful as an anodic material for a solid oxide fuel cell (SOFC).
REFERENCES:
patent: 3300344 (1967-01-01), Bray et al.
Karl V. Kordesch et al., Ullman's Encyclopedia of Industrial Chemistry, vol. A12, Ed. 1989, pp. 80-83.
Morphology and Electrochemistry of Porous Nickel/Zirconia Cermets, at pp. 90-98 of Proceedings of the First International Symposium on Solid Oxide Fuel Cells, S. C. Singhal, Ed. 1989.
H. Arai, International Symposium on SOFC, Nov. 13-14, 1989, Nagoya, Japan pp. 288-292.
Gagliardi Federica
Lockhart Thomas P.
Piro Giampietro
Zanibelli Laura
Eniricerche S.p.A.
Hoare, Jr. George P.
Rosenberg Peter D.
Snam S.p.A.
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