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Viscosity of the Sodium–Borate Melts Containing Mechanically Activated Samarium, Europium, Erbium, and Thulium Oxides

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Abstract

The viscosities (η) of the sodium–borate melts containing 1 wt % mechanically activated lanthanide oxide (Sm2O3, Eu2O3, Er2O3, Tm2O3) are determined with an oscillatory viscometry in the temperature range 950–1650 K. The laws of changing the viscosity as a function of temperature and composition are found, and the temperatures of the onset of solidification of the melts are determined. The dependence of the logarithm of viscosity on the reciprocal temperature is found to have high- and low-temperature sections with different activation energies of viscous flow. The changes in the viscosity are explained in terms of changes in the melt structure.

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Funding

This work was performed in the framework of a state assignment 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, Yekaterinburg, Russia

    A. V. Ivanov & V. V. Ryabov

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  1. A. V. Ivanov
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  2. V. V. Ryabov
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Correspondence to A. V. Ivanov.

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Translated by K. Shakhlevich

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Ivanov, A.V., Ryabov, V.V. Viscosity of the Sodium–Borate Melts Containing Mechanically Activated Samarium, Europium, Erbium, and Thulium Oxides. Russ. Metall. 2021, 133–136 (2021). https://doi.org/10.1134/S0036029521020105

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  • DOI: https://doi.org/10.1134/S0036029521020105

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