Study of the glass transition in amorphous Se by differential scanning calorimetry

The study of glass transition temperature in Sb–V2O5–TeO2 glasses at different heating rates

“…As the output of the DSC during heating is proportional to the heat capacity, it is a straightforward and convenient method of detecting the glass transition and investigating its kinetics. For example, the heating rate dependence of T g can be used to determine the activation energy of the transition from glassy to liquid state [33,[39][40][41].…”

“…Other definitions for T g have been used by different workers. For instance, Abu-Sehly et al [40] and Moynihan et al [33] have used different definitions of T g that include the extrapolated onset, the inflection point and the maximum point of the endothermic trace. The exothermic peak temperature T cr is used to identify the crystallization process.…”

“…As discussed earlier, crystalline peaks in the XRD pattern for S12 are attributed to microcrystalline phases embedded in amorphous matrix. It has been suggested that the glass transition temperature increases if the average coordination number increases [37,40]. This may be due to the decrease in the number of V-V bonds and the increase in the V-Sb bonds as a result of increase in the Sb concentration (x).…”

Kinetics of the glass transition in Se72Te23Sb5 chalcogenide glass: Variation of the activation energy

“…It is worth observing that an order of magnitude increase inˇcauses a shift in T g of ∼14 K. As the output of the DSC during heating is proportional to the heat capacity, it is a straightforward and convenient method of detecting the glass transition and investigating its kinetics. For example, the heating rate dependence of the glass transition temperature T g can be used to determine the activation energy of the transition from glassy to liquid state [4,5,9,[13][14][15][16][17][18]. The onset of the endothermic change is commonly used to define the T g of the glass transition.…”

Study of Glass Transition and Crystallization Behavior in Ga15Se85-xPbx(0 ≤ x ≤ 6) Chalcogenide Glasses

“…Abu-Sehly [23] has studied kinetics studies of crystallization of TeAsCu chalcogenide glasses, Elabbar et al [24] have studied the crystallization kinetics of PbSe chalcogenide glasses using DSC techniques, Soltan [25] has studied the pre-crystallization kinetics of PbSe glass, Mehta et al [26] have studied the glass transition phenomena in SeTe and SeGe based ternary chalcogenides glasses, Abd Elnaeim et al [27] have studied the glass transition and crystallization kinetics in InSeTe chalcogenide glasses. The work on glass transition temperature and thermal stability of SeSn chalcogenide glass by Omar et al [28], study of the glass transition in amorphous Se by Abu-Sehly et al [29], calorimetric studies of SeTeCd and SeTeCdIn multicomponent chalcogenide glasses by Kumar and Singh [30], phase transformation kinetics of SeGePb chalcogenide glass by Praveen et al [31], determination of crystallization parameters of GeTe glasses by El-Oyoun [32] are also worth mentioning. The studies on preparation and char- The contents were heated in a microprocessor-controlled programmable mue furnace, where the temperature was increased at 3 K/min up to 1273 K and kept at that temperature for 14 h with frequent rocking to ensure the homogenization of the melt.…”