ACTIVATION ENERGY OF CRYSTALLIZATION AND ENTHALPY RELEASED OF Se90In10-xSbx (x=0, 2, 4, 6, 8, 10) CHALCOGENIDE GLASSES

作者：Jain Praveen K^*; Deepika; Rathore K S; Jain Nidhi; Saxena N S

来源：Chalcogenide Letters, 2009, 6(3): 97-107.

• Chalcogenide glass
• Activation energy of crystallization
• DSC
• Avrami index

Se90In10-xSbx (x=0, 2, 4, 6, 8, 10) chalcogenide glasses are prepared by melt quenching method. Devitrification characteristics of the alloys were investigated by using Differential Scanning Calorimetry (DSC). The glassy samples are scanned in DSC at various heating rates of 5, 10,15,20,25, and 30 K/min. The dependence of on-set crystallization temperature (T-c) on heating rates as well as different concentration of Sb is studied. Using partial peak area analysis of the crystallization peak in the DSC thermograms, the volume fraction of the glass crystallized at various temperatures is evaluated. The crystallization data were analyzed with the Matusita and Sakka's method specifically suggested for non-isothermal crystallization. This method is used to calculate the activation energy of crystallization (E-c) and Avrami index (n) and hence the dimensionality of crystal growth. The variation of activation energy of crystallization (E-c) with heating rate and Sb concentration has also been studied. Thermal stability has been monitored through the calculation of the enthalpy released during crystallization (Delta H-c).

• 出版日期2009-3