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Thermal properties of high purity zinc-tellurite glasses for fiber-optics
- Kut'in, А.M., Plekhovich, А.D., Balueva, К.V., Motorin, S.E., Dorofeev, V.V.
- Thermochimica acta 2019 v.673 pp. 192-197
- ambient temperature, differential scanning calorimetry, fiber optics, heat, prediction, thermal conductivity, thermal expansion, zinc oxide
- The thermal properties of the series of high-purity zinc-tellurite glasses (TeO2)(0.86-x)(ZnO)x(La2O3)0.04(Na2O)0.1 were studied. The heat capacity and characteristics of transitions between aggregative states were determined by the method of differential scanning calorimetry (DSC) in the temperature range 320–950 K. The experimentally obtained values of thermal conductivity, density and coefficient of thermal expansion at room temperature are as follows: 1.14 ± 0.06 W/(m K), 5.20 ± 0.02 g/cm3 and (54.6 ± 1.2)∙10−6 K-1, respectively. The model-statistical processing of calorimetric data was used to determine the complete set of standard thermodynamic functions together with their approximation to the unexplored low-temperature region by means of parametric similarity. The approach allows predicting the functions for unexplored intermediate glasses compositions.