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A Study on the Examination of Reaction Mechanism for Molten Salt Electrolysis of Titanium Dioxide  

Jo, Sung-Koo (Non-ferrous Refining Project, Research Institute of Industrial Science and Technology (RIST))
Jung, Jae-Young (Non-ferrous Refining Project, Research Institute of Industrial Science and Technology (RIST))
Publication Information
Korean Journal of Metals and Materials / v.47, no.3, 2009 , pp. 182-187 More about this Journal
Abstract
The molten salt electrolysis is applied to reduce titanium dioxide to titanium metal using calcium chloride as an electrolyte and the reaction mechanism of the reduction process is examined by analyzing the reaction products. The process conditions to obtain titanium metal for $900^{\circ}C$ correspond to 2.9~3.2 V and 24 hours. The reaction products for 2.9 V at $900^{\circ}C$ include irregular-shaped titanium oxides such as $Ti_4O_7$, $Ti_3O_5$ and $Ti_2O_3$ and polyhedral $CaTiO_3$. Using these microstructure analysis, the sequential reaction mechanism for the electrochemical reduction of titanium dioxide to titanium is proposed.
Keywords
titanium; titanium dioxide; molten salt electrolysis; calcium chloride; reaction mechanism;
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