Ceramic oxide electrodes for molten salt electrolysis

摘要

PCT No. PCT/US80/01609 Sec. 371 Date Jul. 24, 1981 Sec. 102(e) Date Jul. 24, 1981 PCT Filed Dec. 4, 1980 PCT Pub. No. WO81/01717 PCT Pub. Date Jun. 25, 1981.A substantially non-consumable anode used in the production of aluminium from a cryolite-based fused bath containing alumina consists of a sintered self-sustaining ceramic oxide body of spinel structure which is made conductive by selective partial substitution, the introduction of non-stoichiometry or by doping so as to maintain the impurities in the produced aluminium at low levels. Preferred materials are partially-substituted nickel ferrite spinels.