An Investigation on Electrodeposition of Titanium in Molten LiCl-KCl
A molten LiCl-KCl (40.8:59.2, mol%) eutectic salt was used as an electrolyte due to its relatively low melting point. The molar ratio of fluoride ions and titanium ([F−]/[Tin+] ratio) was employed as a parameter to illustrate the influence of fluoride anions on the electrochemical behaviors of Ti(III), and KF was used as a source of fluoride ions. A study on the electrochemical properties of Ti(III) was carried out in molten LiCl-KCl-KF. Results suggest that there are two steps for reducing Ti(III) in molten LiCl-KCl: Ti(III) → Ti(II) and Ti(II) → Ti. Ti(III) can be reduced directly to Ti in one step when KF was added in the melt in increasing amount. Metallic titanium was produced when [F−]/[Tin+] equals to 10, and it is dendrites with a layer structure. The oxygen contents in the titanium crystal are 1200 ppm.
KeywordsLiCl-KCl Fluoride ions SWV Dendrites
The authors thank support from Collaborative Innovation Center of Henan Resources and Materials Industry, Zhengzhou University and Startup Research Fund of Zhengzhou University (No. 32210804). The authors are grateful to the National Natural Science Foundation of China (No. 51804277) and Key Projects of Henan Province Department of Education (No. 19B450004).
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