Thermo-physical properties of 0.72TeO2–0.24WO3–0.04La2O3 glass

0.72TeO2–0.24WO3–0.04La2O3 glass and melt were studied by differential scanning calorimetry (DSC) method. Heat capacity and transition temperature of the glass were precisely found. The improved comparative technique for DSC-measurement of thermal conductivity coefficient of vitreous state of the sample has been developed. A model-statistical approach was used for processing the experimental data to calculate parameters of elementary excitations, that allowed to find out a complete set of thermal properties along with density and coefficient of thermal expansion.

► High-purity TeO2–WO3–La2O3 glass and melt were studied by DSC. ► A model-statistical approach was used for processing the experimental data. ► The complete set of thermo-dynamic functions in vitreous and liquid states was found. ► The temperature dependencies of density and thermal expansion coefficient were calculated.