, Volume 38, Issue 4, pp 379-385

Temperature behavior of the free activation energy of viscous flow of glass-forming melts in a wide temperature range

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Abstract

The Jenckel equation for the temperature dependence of the free activation energy of viscous flow of inorganic glasses has been satisfactorily interpreted within the hole-activation model of viscous flow. “The formation of a fluctuation hole” (deformation of a region of the network) characterizes a preliminary local change in the structure that is necessary for the main elementary act of viscous flow of refractory glass-forming melts, i.e., the switching of bridge valence bonds according to the Muller-Nemilov mechanism.

Original Russian Text © D.S. Sanditov, S.B. Munkueva, A.A. Mashanov, B.D. Sanditov, 2012, published in Fizika i Khimiya Stekla.