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TiB_2/C cathode composites with various contents of TiB_2 were prepared and their characterizations were observed and compared. The expansion of samples due to sodium and bath penetration was tested with a modified laboratory Rapoport apparatus and the appearances of the cut sections of specimens after electrolysis were studied. The results show that the mass of TiB_2/C cathode composites with mass fraction of TiB_2 less than 70% appreciably increases, but that of the composites with mass fraction of TiB_2 more than 70% decreases slightly after being baked. The resistance to sodium and bath penetration of TiB_2/C cathode composites increases with the increase of TiB_2 content, especially in the composites with high TiB_2 content. TiB_2/C cathode composites have high resistance to the penetration of sodium and bath as well as good wettability by molten aluminum, and keep integrality and have little change of appearance after electrolysis, which indicates that TiB_2/C cathode composites can be used as inert wettable cathode for aluminum electrolysis.
TiB_2 / C cathode composites with various contents of TiB_2 were prepared and their characterizations were observed and compared. The expansion of samples due to sodium and bath penetration tested with a modified laboratory Rapoport apparatus and the appearances of the cut sections of specimens after electrolysis were The results show that the mass of TiB 2 / C cathode composites with mass fraction of TiB 2 less than 70% appreciably accounts for but the the composites with mass fraction of TiB_2 more than 70% reduced slightly after being baked. The resistance to sodium and bath penetration of TiB 2 / C cathode composites with the increase of TiB 2 content, especially in the composites with high TiB 2 content. TiB 2 / C cathode composites have high resistance to the penetration of sodium and bath as well as good wettability by molten aluminum, and keep integrality and have little change of appearance after electrolysis, which indicates that TiB_2 / C cathode composites can be used as inert wettable cathode for aluminum electrolysis.