Phase relations and thermodynamics of nonstoichiometric vanadium sulfide in the range VS through V3S4

Nakano-Onoda, M.; Nakahira, M.

doi:10.1016/0022-4596(79)90239-1

Cited by 14 publications

(1 citation statement)

References 10 publications

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“…It indicates that the calcium sulfurization occurs much easier than the vanadium sulfurization at V 2 S 3 composition. Similarly, sulfur potentials of vanadium sul de in the composition between VS and V 3 S 4 at 1023 K through 1490 K are much higher than that of sulfurization of calcium 19) . These studies indicate calcium has suf cient ability of reduction of vanadium sul des in various compositions.…”

Section: Introductionmentioning

confidence: 99%

Electrolytic reduction of V3S4 in molten CaCl2

2017

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Metallic vanadium was successfully produced starting from vanadium sul de by applying electrolysis in molten CaCl 2 . Vanadium sul de lled in a cathodic Ti basket and a graphite anode were immersed in the melt of CaCl 2 -CaS at 1173 K in Ar, and the electrolysis was conducted at a cell voltage of 3.0 V. Sul de electrolysis did not form carbon deposit and was free from carbon contamination, while carbon powder was formed on the cathode in the oxide electrolysis using the melt of CaCl 2 -CaO. When the CaS content in the molten CaCl 2 increased, electrolysis current increased resulting in fast smelting while the oxygen and sulfur contents in metallic vanadium increased. Oxygen and sulfur contents as low as 3390 ppm and 210 ppm, respectively, were achieved by supplying about four times more electrical charge than stoichiometry.

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Section: Introductionmentioning

confidence: 99%