Cerium oxycompound, stable anode for molten salt...

Details Cerium oxycompound, stable anode for molten salt... Cerium oxycompound, stable anode for molten salt...

C - Chemistry, Metallurgy

25

C

356/178, 117/226

C25C 3/12 (2006.01) C04B 35/50 (2006.01) G01N 27/12 (2006.01) H01L 23/29 (2006.01)

Patent

CA 1329380

CERIUM OXYCOMPOUND, STABLE ANODE FOR MOLTEN SALT ELECTROWINNING AND METHOD OF PRODUCTION ABSTRACT The morphology of a coating of an oxyfluoride of cerium on a conductive substrate is improved by addition of tantalum, niobium and/or other pentavalent metals. Whereas a cerium oxurluoride coating shows cracks which may extend throughout the entire thickness of the coating, thus exposing finite portions of the substrate to corrosive attack, the pentavalent-doped coating has a substantially impervious structure. In addition to improvement of the coating morphology, the electrical conductivity is increased. The pentavalent-doped cerium oxyfluoride can be produced by electrodeposition or sintering. Coatings, substrates or bodies of this material may be employed as non-consumable anodes in molten aluminum electrowinning cells, as chemical sensors, or for corrosion protection and other applications.

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