1. Production of Metallic Titanium by Electrowinning in Molten Salts of Titanium Oxycarbide Anode †.
- Author
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Malek, Btissem, Serp, Jerome, Doreau, Franck, Miguirditchian, Manuel, Vandenhende, Marion, Pradeilles, Nicolas, Lepetitcorps, Yann, and Maitre, Alexandre
- Subjects
TITANIUM ,ANODES ,CATHODES ,ELECTROWINNING ,VOLTAMMETRY - Abstract
The electrochemical behavior of Ti
3+ in LiCl-LiF-TiF3 salt was investigated by cyclic and square wave voltammetries at 853 K. Both methods confirm the presence of a single reduction wave of Ti3+ ions to metal, at a potential of −2.3 V vs. Cl2 /Cl− . The closeness of the potentials of TiCx Oy dissolution and Ti3+ /Ti4+ wave is an issue during the electrorefining of the anode. A low current density has to be applied to stay within the titanium oxycarbide dissolution and avoid the formation of Ti4+ . The titanium deposition was studied by electrorefining of a titanium metal plate in LiCl-LiF-TiF3 (0.62 mol/kg). The cathodic deposit analysis by XRD and SEM confirms the formation of titanium metal with an average grain size of 150 µm. The faradic deposition yields are above 85% and constant between 60 and 160 mA/cm2 . [ABSTRACT FROM AUTHOR]- Published
- 2023
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