Effect of lanthanide group REM oxides activated mechanically on the viscosity of borate melts

doi:https://doi.org/10.1134/s003602951502007x

Article10.1134/s003602951502007x

Effect of lanthanide group REM oxides activated mechanically on the viscosity of borate melts

S. A. Istomin,A. A. Khokhryakov,V. V. Ryabov,А. В. Иванов,A. S. Paivin-2015-02-01-Russian Metallurgy (Metally)

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TL;DRAbstract

The viscosity of borate melts containing 1 wt % lanthanide group REM oxide is studied by an oscillatory viscometer in the temperature range 1100–1700 K. The activation energy of viscous flow is calculated. The zigzag-shaped dependence of the viscosity on the atomic number of a lanthanide in a number of melts obeys the series periodicity (tetrad effect). The deviations from the tetrad effect are due to the formation of divalent rare-earth element ions.

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The viscosity of borate melts containing 1 wt % lanthanide group REM oxide is studied by an oscillatory viscometer in the temperature range 1100–1700 K. The activation energy of viscous flow is calculated. The zigzag-shaped dependence of the viscosity on the atomic number of a lanthanide in a number of melts obeys the series periodicity (tetrad effect). The deviations from the tetrad effect are due to the formation of divalent rare-earth element ions.

Keywords

LanthanideBoronViscometerTetradViscosityChemistryDivalentActivation energy

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