Differential scanning calorimetry studies of Se85Te15â€�?�ð�?�¥Pbð‘�? (ð‘�? = 4, 6, 8 and 10) glasses

[摘要] Results of differential scanning calorimetry (DSC) studies of Se₈₅Te_{15â€�?�ð�?��?}Pb_ð‘�? (ð‘�? = 4, 6, 8 and 10) glasses have been reported and discussed in this paper. The results have been analyzed on the basis of structural relaxation equation, Matusita’s equation and modified Kissinger’s equation. The activation energies of structural relaxation lie in between 226 and 593 kJ/mol. The crystallization growth is found to be onedimensional for all compositions. The activation energies of crystallization are found to be 100â€�??136 kJ/mol by Matusita’s equation while 102â€�??139 kJ/mol by modified Kissinger’s equation. The Hruby number (indicator of ease of glass forming and higher stability) is the highest for Se₈₅Te₉Pb₆ glass while S factor (indicator of resistance to devitrification) is highest for Se₈₅Te₇Pb₈ glass at all heating rates in our experiment. Further the highest resistance to devitrification has the highest value of structural activation energy and the activation energy of crystallization is maximum for the most stable glass by both Matusita’s equation and the modified Kissinger’s equation.

[学科分类] 材料工程

[关键词] Stability;devitrification;activation energy;dimension of growth.