Study of glass transition process in quasi-binary As₂S₃-CdS chalcogenides

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• 作者：S.R. Luki?-Petrovi? ; M.D. Vu?kovac ; G.R. ?trbac ; D.D. ?trbac
• 关键词：Chalcogenide glasses ; Differential scanning calorimetry ; Glass transition ; Coordination number ; Activation energy
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2013
• 出版时间：1 October, 2013
• 年：2013
• 卷：377
• 期：Complete
• 页码：21-25
• 全文大小：604 K

文摘

The kinetics of the glass transition in the (As₂S₃)_1 ? x(CdS)_x (x = 0, 2, 5) chalcogenide glass have been investigated using differential scanning calorimetry (DSC) at five different heating rates under non-isothermal conditions. Two approaches, namely Moynihan and Kissinger, were used to calculate the relaxation activation energy (E_g) from the heating rate dependence of the glass transition temperature (T_g). The variability of the activation energy with temperature was correlated with the dynamic fragility parameter (m); these parameters as well as the jump of heat capacity (¦¤C_p) and coordination number < r> are also calculated. Based on this calculations it was concluded how much impact of the addition of CdS to the As₂S₃ matrix is on the thermal properties of these glasses.