CERIUM OXYCOMPOUND, STABLE ANODE FOR MOLTEN SALT ELECTROWINNING AND METHOD OF PRODUCTION

摘要

CERIUM OXYCOMPOUND, STABLE ANODE FOR MOLTEN SALTELECTROWINNING AND METHOD OF PRODUCTIONABSTRACTThe morphology of a coating of an oxyfluoride ofcerium on a conductive substrate is improved by additionof tantalum, niobium and/or other pentavalent metals.Whereas a cerium oxurluoride coating shows cracks whichmay extend throughout the entire thickness of the coating,thus exposing finite portions of the substrate tocorrosive attack, the pentavalent-doped coating has asubstantially impervious structure. In addition toimprovement of the coating morphology, the electricalconductivity is increased. The pentavalent-doped ceriumoxyfluoride can be produced by electrodeposition orsintering. Coatings, substrates or bodies of this materialmay be employed as non-consumable anodes in moltenaluminum electrowinning cells, as chemical sensors, or forcorrosion protection and other applications.