On Diffusive Confining a Galvanic Crystallization out of Molten Salts


The electron-energy band structure of electric Double Layer (DL) between a molten salt and metal electrode (an anode or cathode) is studied for the electrodepositing crystallization process when the width of DL metal part is less than the one in the molten salt. It is shown that just the molten-salt part of the double layer confines a rate of electrodepositing process. The reason of this is a neutralization of depositing ions into the molten-salt near the electrode and hence their diffusively confined motion in a density gradient field. It is important to minimize the electrodepositing potential for effective component crystallization out of the molten salt and its exchange process including selective extracting of salt components by their crystallization on electrodes of galvanic circuit. It is shown that this can be carried out by means of fine and controllable variation of reduction-oxidation (RedOx) potential of the non-stoichiometric salts. A possible application of a potentiometer for monitoring and managing the salt composition is considered. For this, one uses precise methods of electric-motion-force and coulometer titration by solid electrolyte(for example, M+–β ”–Al2O3) of the basic salt metal (M) as a reduction agent in the molten-salt solution.

Share and Cite:

A. Shimkevich, "On Diffusive Confining a Galvanic Crystallization out of Molten Salts," Journal of Crystallization Process and Technology, Vol. 2 No. 4, 2012, pp. 146-151. doi: 10.4236/jcpt.2012.24021.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] G. V. M. Smirnov, “Electrode Potentials in the Fused Chlorides,” Science, Moscow, 1973.
[2] A. I. Gusev and A. A. Rempel, “Structural Phase Transitions in Nonstoichiometric Compounds,” Science, Moscow, 1988.
[3] P. N. Alekseev and A. L. Shimkevich, “On Voltage Sensitive Managing the RedOx Potential of MSR Fuel Composition,” Proceedings of the 16th International Conference on Nuclear Engineering of the ASME, Orlando, 11-15 May 2008.
[4] R. Zakirov, V. Ignatiev, V. Subbotin and A. Toropov, “Electrochemical Properties of Zirconium, Plutonium, and Lanthanides in Fluoride Melts,” Proceedings of the International Conference ATALANTE, N?mes, 21-25 June 2004, Paper O22-09.
[5] P. N. Alekseev, N. N. Ponomarev-Stepnoi, A. A. Proshkin and A. L. Shimkevich, “On Designing Nuclear Fuel with Low Factor of Swelling,” Preprint IAE-6259/11, RRC KI, Moscow, 2003.
[6] V. V. Osiko, A. L. Shimkevich and B. A. Shmatko, “Electronic Model for FIANIT,” Transactions of Russian Academy of Sciences (Doklady Akademii Nauk), Vol. 267, 1982, pp. 351-354. http://en.wikipedia.org/wiki/Double_layer(interfacial)
[7] K. Bohinc, V. Kralj-Iglic and A. Iglic, “Thickness of Electrical Double Layer, Effect of Ion Size,” Electrochimica Acta, Vol. 46, No. 19, 2001, pp. 3033-3041. doi:10.1016/S0013-4686(01)00525-4
[8] D. Y. C. Chan, Th. W. Healy, Th. Supasiti and S. Usui, “Electrical Double Layer Interactions between Dissimilar Oxide Surfaces with Charge Regulation and Stern-Grahame Layers,” Journal of Colloid and Interface Science, Vol. 296, No. 1, 2006, pp. 150-158. doi:10.1016/j.jcis.2005.09.003
[9] S. Bourg, F. Peron and J. Lacquement, “Non Aqueous Dissolution of Inert Matrices for Future Nuclear Fuel,” Proceedings of the International Conference ATALANTE, N?mes, 21-25 June 2004, Paper 1-06.
[10] P. N. Alekseev, E. I. Grishanin and A. L. Shimkevich, “The Sodium Gauge for Measuring RedOx Potential of Molten Salts,” RF Patent No 2012102126, 2012.

Copyright © 2022 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.