熔盐电脱氧法制取Ti机理的研究

通过低电压电解实验和不同阴极电解对比实验,并结合循环伏安曲线研究了熔盐电脱氧法制取金属Ti过程中阴极的反应机理。结果表明,在没有金属Ca生成的情况下,TiO2阴极可以直接还原,生成低价钛氧化物。在正常电解的情况下,阴极进行的主要电极反应是TiO2的直接电还原反应,同时在阴极也存在一定的钙热还原反应,只是反应强度比较弱。

Research on Reaction Mechanism of Titanium Preparation by Electro-deoxidation in Molten Salt

The direct electro-deoxidation process of solid titanium dioxide was investigated in molten calcium chloride. This study focused on cathodic reactions of the electrolytic process. Products of low-voltage electrolysis were characterized by XRD. The results indicate that titanium dioxide cathode is reduced, although calcium does not exist in molten salt. The current-time plots of the constant voltage electrolysis using different cathodes demonstrate that direct electrochemical reduction of titanium dioxide is the primary reaction in cathodes; at the same time, faint calcium thermal reduction also exists.