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For cermet inert anode containing oxide and metal phases useful for the electrolytic production of metals

United States Patent

July 23, 2002
View the Complete Patent at the US Patent & Trademark Office
A cermet inert anode for the electrolytic production of metals such as aluminum is disclosed. The inert anode comprises a ceramic phase including an oxide of Ni, Fe and M, where M is at least one metal selected from Zn, Co, Al, Li, Cu, Ti, V, Cr, Zr, Nb, Ta, W, Mo, Hf and rare earths, preferably Zn and/or Co. Preferred ceramic compositions comprise Fe.sub.2 O.sub.3, NiO and ZnO or CoO. The cermet inert anode also comprises a metal phase such as Cu, Ag, Pd, Pt, Au, Rh, Ru, Ir and/or Os. A preferred metal phase comprises Cu and Ag. The cermet inert anodes may be used in electrolytic reduction cells for the production of commercial purity aluminum as well as other metals.
Ray; Siba P. (Murrysville, PA), Liu; Xinghua (Monroeville, PA), Weirauch; Douglas A. (Murrysville, PA)
Alcoa Inc. (Pittsburgh, PA)
09/ 629,332
August 1, 2000
GOVERNMENT CONTRACT This invention was made with Government support under Contract No. DE-FC07-98ID13666 awarded by the Department of Energy. The Government has certain rights in this invention.