The Electronic Component of Solid Fluoride Electrolytes

Authors

  • Piotr Palimąka AGH - University of Science and Technology Faculty of Non-Ferrous Metals 30 Mickiewicza Av. 30-059 Krakow
  • Stanisław Pietrzyk AGH - University of Science and Technology Faculty of Non-Ferrous Metals 30 Mickiewicza Av. 30-059 Krakow

DOI:

https://doi.org/10.7494/mafe.2016.42.3.147

Keywords:

aluminium electrolysis, electronic conductivity, electrical conductivity

Abstract

The solid electrolytes based on sodium cryolite are present in aluminium electrolysers as frozen crystals formed on the side walls of the carbon lining (side ledge). Their main task is to protect the lining from the effect of liquid electrolyte and ensure temperature stabilization during the process of electrolysis. On the other hand, being electrically conductive, they can reduce the current efficiency. In this study, the value of the electronic component of the total conductivity of the solidified electrolytes of different compositions was determined. It was found that the highest electronic conductivity is exhibited by electrolytes containing both aluminium and calcium fluoride. However, the electronic component of the total conductivity is not high and reaches 0.1-2.3 mS/cm. Its share in the total conductivity of the solid multi-component electrolytes varies and, depending on their composition, is in the range of 1 ÷ 10%.

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References

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Published

2017-04-22

How to Cite

Palimąka, P., & Pietrzyk, S. (2017). The Electronic Component of Solid Fluoride Electrolytes. Metallurgy and Foundry Engineering, 42(3), 147. https://doi.org/10.7494/mafe.2016.42.3.147

Issue

Vol. 42 No. 3 (2016)

Section

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