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Isotherms of Density, Surface Tension, and Na Adsorption in Pb–Na Melts

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Bulletin of the Russian Academy of Sciences: Physics Aims and scope

Abstract

A study of the effect small additions of sodium have on the surface tension (ST) of Pb–Na binary melts reveals a sharp drop in ST in the range of 0.2–0.25 at % Na. Calculations of the sodium adsorption isotherm indicate a maximum in the same region of the composition. An explanation for this effect is proposed. It is shown that the composition of the melt at which the maximum of sodium adsorption is observed is determined by the product of coefficient of displacement γ and the exchange parameter of the surface layer of a melt with volume F. It is established that raising the temperature of the melt results in partial decomposition of quasi-molecular formations with participation of sodium, filling of the surface of the melt, and a shift in the position of adsorption maximum toward an increase in the content of sodium.

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ACKNOWLEDGMENTS

The authors wish to thank Dr. (Phys.-Math.) Kalazhokov Khamidbi Khazhismelovich of Kabardino-Balkarian State University for his helpful comments on our work.

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Authors and Affiliations

  1. Kabardino-Balkarian State University, 360004, Nalchik, Russia

    B. S. Karamurzov, M. Kh. Ponezhev, A. H. Shermetov & A. A. Shokarov

  2. Chechen State University, 364907, Grozny, Russia

    R. A. Kutuev

  3. North Caucasian Mining and Metallurgical Institute, 362021, Vladikavkaz, Russia

    V. A. Sozaev

Authors
  1. B. S. Karamurzov
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  2. R. A. Kutuev
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  3. M. Kh. Ponezhev
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  4. V. A. Sozaev
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  5. A. H. Shermetov
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  6. A. A. Shokarov
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Corresponding author

Correspondence to V. A. Sozaev.

Additional information

Translated by A. Bannov

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Karamurzov, B.S., Kutuev, R.A., Ponezhev, M.K. et al. Isotherms of Density, Surface Tension, and Na Adsorption in Pb–Na Melts. Bull. Russ. Acad. Sci. Phys. 85, 1008–1011 (2021). https://doi.org/10.3103/S106287382109015X

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  • DOI: https://doi.org/10.3103/S106287382109015X

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