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Cathodic electrolysis of chloride—fluoride and oxyfluoride—chloride melts of tantalum

✍ Scribed by V.I. Konstantinov; E.G. Polyakov; P.T. Stangrit

Publisher
Elsevier Science
Year
1978
Tongue
English
Weight
357 KB
Volume
23
Category
Article
ISSN
0013-4686

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✦ Synopsis

The electrochemical reduction of tantalum from the molten KCI-KF-K,TaF, is shown to be a fast one step reaction: [TaFJc3 + 5Z+ Ta" + SF-Tantalum pentoxide dissolves in the chloride-fluoride melt and reacts with potassium fluortantalate to form monoxyfluodde tantalum complexes such as TaOF;' and, to a small extent, dioxyfluoride complexes such as Ta0,FT3. Depending on the cd and oxygen-containing ion concentration in the melt the cathodic proozss involves the five-electron reduction of one or more complexes of tantalum.

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