Dissolution Characteristic of Titanium Oxycarbide Electrolysis

Abstract

Aiming at the problems of residual anode and free carbon generated in titanium oxycarbide electrolysis (TiC_0.5O_0.5), the phase composition and microstructure of TiC_0.5O_0.5 were characterized by XRD, SEM, EDS and POM. The results show that: titanium oxycarbide (TiC_0.5O_0.5) with similar crystal morphology and structure could be obtained by carbothermic reduction from TiO₂ and sintering from TiC and TiO, which is composed of 15～21% gray-white titanium carbide, 56～69% yellow titanium oxycarbide and 13～25% aubergine titanium oxycarbide. The grain color of titanium oxycarbide is related to the content of carbon and oxygen. Gray-white titanium carbide contains 20～30% C, yellow titanium oxycarbide 10～50% C and 10～20% O, and aubergine titanium oxycarbide 5～10%C and 25～30% O. The structure of titanium oxycarbide is not uniformity, which results in the formation of residual anode and carbon. The gray-white and aubergine components in titanium oxycarbide are rich in TiC and TiO respectively, which generate free C, CO₂, Ti₂O₃ and TiO₂ after electrolysis.