Ceramic oxide electrodes for molten salt electrolysis
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United States of America Patent
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Nov 12, 1985
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N/A
app pub date -
Jul 24, 1981
filing date -
Dec 6, 1979
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Expired
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Abstract
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.
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