Non-consumable electrode for molten salt electrolysis

Claim 1

A cermet electrode composition comprising: (a) at least about 75 vol. % of a hexagonal ferrite component ceramic composition wherein the mole % proportion of components A i O, (A j ) 2 O 3 and A k O of said ceramic composition lie within the area defined as a-b-c-d of the composition diagram of FIG. 2 of the drawings, where: A i is selected from the group consisting of a divalent ion from the first transition series, Sn, Zr, Nb, Ta, Hf, Mg, Li, an ion pair with one of the pair having a valence of 1+ and the other member of the pair having a valence of 3+, and combinations thereof; A j is selected from the group consisting of an Fe ion or a mixture of said Fe ion and one or more ions of Al, Co, Y or Mn; A k is a divalent ion selected from the group consisting of a member of the Lanthanide series, La, Pb, the alkaline earth group excluding Mg, and combinations thereof; and O is oxygen; and (b) no more than about 25 vol. % of a metal component selected from the group consisting of Ni, Fe, Cu, Co, Cr and mixtures thereof.