Abstract
The temperature dependence of the electrical conductivity of vitreous lithium, sodium, and potassium metaphosphates is investigated using active electrodes (amalgams of the relevant alkali metals). The decrease in the electrical conductivity in the sequence LiPO3–NaPO3–KPO3 is explained by the fact that the electric current in lithium metaphosphate is carried by lithium ions, whereas the electricity transport in NaPO3 and KPO3 occurs through alkali metal ions together with protons formed upon dissociation of impurity water. The kink observed in the temperature dependence of the electrical conductivity of KPO3 is interpreted in terms of the charge carrier type. It is demonstrated that high-temperature (> 373 K) conduction is provided primarily by migration of potassium ions, whereas low-temperature conduction is due to migration of protons.
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Sokolov, I.A., Tarlakov, Y.P., Ustinov, N.Y. et al. Influence of the Nature of an Alkali Cation on the Electrical Conductivity of Vitreous MePO3 (Me = Li, Na, or K). Glass Physics and Chemistry 29, 305–309 (2003). https://doi.org/10.1023/A:1024494317963
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DOI: https://doi.org/10.1023/A:1024494317963