Thermal properties and crosslinking of binary TeO2–Nb2O5 and TeO2–WO3 glasses

Binary tellurite glasses in the form (100 − x)TeO2–xAnOm and AnOm = Nb2O5 and WO3 oxides have been prepared by the melt quenching technique and x = 4, 10 mol% for Nb2O5 and 20 mol% WO3. Density and molar volume have been measured and calculated. Differential scanning calorimetric curves of these glasses have been investigated to measure thermal properties of these glasses. The thermal properties were the glass transition temperature Tg (°C), the onset of crystallization temperature Tx (°C) and the glass stability S = (Tx − Tg) (°C). The glass transition temperature has been analyzed according to the average crosslink density that is present in the glass.