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Viscosity, Free Activation Energy, and Glass Transition Temperature of Potassium Boron K2O–B2O3 Melts

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Abstract

The viscosity of potassium–boron melts is measured in the temperature range 918–1699 K using a vibrational viscosimeter. The content of potassium oxide is varied from 0.74 to 28.46 mol %. The parameters of the viscous flow in melts (the configuration–activation energy(εh) and the shifting energy of the bridging oxygen atoms’ bonds (U∞)) using the configuration–activation model are calculated for two temperature intervals 918–1400 K and 1400–1699 K. The glass transition temperature (Tg) is measured by differential scanning calorimetry (DSC) and the concentration dependence of the glass transition temperature on the content of potassium oxide in the melt is shown.

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Funding

This study was supported as part of a state task of the Institute of Metallurgy, Ural Branch, Russian Academy of Sciences .

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Authors and Affiliations

  1. Institute of Metallurgy, Ural Branch, Russian Academy of Sciences, 620016, Yekaterinburg, Russia

    A. A. Khokhryakov, M. A. Samoylova, V. V. Ryabov, L. B. Vedmid’ & S. Yu. Mel’chakov

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  1. A. A. Khokhryakov
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  2. M. A. Samoylova
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  3. V. V. Ryabov
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  4. L. B. Vedmid’
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  5. S. Yu. Mel’chakov
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Correspondence to M. A. Samoylova.

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Khokhryakov, A.A., Samoylova, M.A., Ryabov, V.V. et al. Viscosity, Free Activation Energy, and Glass Transition Temperature of Potassium Boron K2O–B2O3 Melts. Glass Phys Chem 49, 239–244 (2023). https://doi.org/10.1134/S1087659623600102

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  • DOI: https://doi.org/10.1134/S1087659623600102

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