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

• Published in: Journal of non-crystalline solids Vol. 377; pp. 16 - 20
• Main Authors: Kut'in, A.M., Dorofeev, V.V., Moiseev, A.N., Churbanov, M.F., Plehovich, A.D., Markin, A.V.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2013
• Subjects: Differential scanning calorimetry; High purity tungstate–tellurite glass; Model-statistical approach; Thermal and volumetric properties; Thermo-dynamic functions; Differential scanning calorimetry; Thermo-dynamic functions; High purity tungstate–tellurite glass; Thermal and volumetric properties; Model-statistical approach
• ISSN: 0022-3093; 1873-4812
• DOI: 10.1016/j.jnoncrysol.2013.02.003

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.