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Determination of the Lithium Content of Molten Aluminum Using a Solid Electrolyte

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Abstract

A lithium probe has been used for the determination of the lithium content of molten aluminum alloys. The electrolyte is a two-phase mixture of Li3PO4 and Li4Si04 to give an overall composition of Li3.6Si0.6P0.4O4. This electrolyte was found to be slightly attacked by pure liquid lithium, but no attack was detected in the aluminum-lithium melts. However, exposure to high humidity caused the electrolyte to degrade. A satisfactory reference electrode was found to be decomposed Li2Ti307 consisting of Li4Ti5O12 and TiO2. An activityvs composition plot showed that Henry’s law was obeyed, and the activity coefficient was 0.17 at 984 K and 0.26 at 1050 K.

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Authors and Affiliations

  1. Chung Shan Institute of Science and Technology, Taiwan, Republic of China

    P. C. Yao

  2. Department of Metallurgy and Materials Science, University of Cambridge, Cambridge, UK

    D. J. Fray (University Lecturer)

Authors
  1. P. C. Yao
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  2. D. J. Fray
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P. C. YAO, formerly Research Student in the Department of Metallurgy and Materials Science, University of Cambridge

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Yao, P.C., Fray, D.J. Determination of the Lithium Content of Molten Aluminum Using a Solid Electrolyte. Metall Trans B 16, 41–46 (1985). https://doi.org/10.1007/BF02657486

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  • DOI: https://doi.org/10.1007/BF02657486

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