Abstract
Electrochemical behavior of KCl-KF-Ta2O5 melts is studied by cyclic voltammetry. It is a Ta(V) oxyfluoride (KTaO2F2, K3TaO2F4, or K3TaOF6), yielded by the Ta2O5-KF interaction in the melt, that presumably participates in the electrochemical process, rather than Ta2O5 proper. The Ta(V) oxyfluoride complex is reduced to tantalum metal at 973 K via three irreversible diffusion-controlled stages. The product of the electrokinetic transfer coefficient and the number of electrons participating in the third stage is determined. The Ta(V) reduction becomes one-staged at 1073 K. Tantalum-containing ternary systems with molybdenum, cobalt, or silicon are prepared by electrolyzing Ta2O5-containing melts.
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Original Russian Text © N.A. Gasviani, M.Sh. Khutsishvili, L.M. Abazadze, S.G. Gasviani, 2007, published in Elektrokhimiya, 2007, Vol. 43, No. 2, pp. 222–227.
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Gasviani, N.A., Khutsishvili, M.S., Abazadze, L.M. et al. Electrochemical behavior of tantalum(V) oxide in chloride-fluoride melts. Russ J Electrochem 43, 211–216 (2007). https://doi.org/10.1134/S1023193507020097
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DOI: https://doi.org/10.1134/S1023193507020097