Phase transitions

Estimation of the temperature band characterizing the liquid–glass transition interval for chalcogenide glasses

A. A. Mashanov^a, M. V. Darmaev^ab, A. B. Lybsanova<sup>a

a</sup> Buryat State University, Ulan-Ude, Russia
^b Institute of Physical Materials Science, Siberian Branch of the Russian Academy of Sciences, Ulan-Ude, Russia

Abstract: The temperature dependence of the viscosity of inorganic glasses in the glass transition region is successfully described by the Williams–Landel–Ferry (WLF) equation. For the studied glasses, the value of $f_g=1/C_1$ weakly depends on the nature of the glasses. There is a linear correlation between $\delta T_g$ and $T_g$. From the data on the parameters of the WLF equation $C_1$ and $C_2$, we calculated $\delta T_g$, as well as the relaxation time of the structure $\tau_g$ at the glass transition temperature of the glasses under study.

Keywords: viscosity in the glass transition region, Williams–Landel–Ferry equation, kinetic glass transition criterion, chalcogenide glasses, fluctuation volume fraction, liquid-glass transition.

Received: 29.04.2022
Revised: 19.05.2022
Accepted: 20.05.2022

DOI: 10.21883/FTT.2022.10.53103.370

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