Chemistry: electrical and wave energy – Processes and products
Patent
1985-09-13
1987-03-17
Williams, Howard S.
Chemistry: electrical and wave energy
Processes and products
204279, 204291, 204243R, 252512, 252519, 264104, 264340, 427431, 501127, C25C 306, B29C 7100, B05D 118
Patent
active
046505520
ABSTRACT:
In the electrolytic production of aluminum by electrowinning or electrorefining processes, cell components such as cathode current feeders which in use are normally covered with molten aluminum are made of a composite material of aluminum or an aluminum alloy or intermetallic compound with an aluminum oxycompound, usually alumina, and possibly containing minor amounts of additives such as borides carbides, nitrides or oxides. The composite material, which remains mechanically stable and electrically conductive at 1000.degree. C., may be prepared by hot pressing powders at 1000.degree.-1700.degree. C. possibly after surface treating the alumina to improve wettability by molten Al. The components are optionally coated, e.g. with TiB.sub.2. The composite materials are also useful as non-current carrying components, including separator walls, weirs, packing elements and baffles.
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Adorian Iudita L.
De Nora Vittorio
Duruz Jean-Jacques R.
Fresnel Jean-Marie
Gauger Jurgen F.
Eltech Systems Corporation
Freer John J.
Williams Howard S.
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