Dependence of the glass transition temperature on the heating rate and structure of chalcogenide glasses

摘要

The values of the apparent activation energy (△E), obtained from the variations of the glass transition temperature with heating rate, were investigated for different vitreous chalcogenide alloys. We observe, for vitreous Se, that △E is sensitive to the connectivity of the network (number of Se-8 rings). For binary alloys SeY (Y = As, Ge), for which the Y-atoms respect the 8-N rule, the variations of the normalized quantity △E_syst/△E_Se with the average coordination number (m) allows the construction of a master curve (△E_syst/△E_Se = -2.13m + 5.26).