BaF2–contained tellurite glasses: Quantitative analysis and prediction of elastic properties and ultrasonic attenuation – Part II

Abstract

The goal of the present paper is to complete our very recent work [J. Fluor. Chem. 210 (2018) 156–165] on the quantitative analysis and prediction of elastic properties, ultrasonic attenuation coefficient and glass transition temperature in binary BaF2-TeO2 glass system over the composition range 7 mol % ≤BaF2 ≥19 mol %. All the above mentioned parameters were correlated with the ratio between packing density and mean atomic volume of the glass on the basis of Abd El-Moneim and Alfifi’s approaches [2018]. In addition to this, the theoretical elastic moduli and Poisson’s ratio were evaluated on the basis of the Rocherulle et al. model [1989] and compared with the corresponding experimental ones. The results show that, the ratio between packing density and mean atomic volume can be considered as a new powerful tool capable of predicting changes in ultrasonic attenuation coefficient, elastic properties and glass transition temperature. Although both the theoretical and experimental elastic moduli display the same compositional trend; a slight discrepancy between the theoretical and experimental values of shear, longitudinal and Young's moduli is observed. This discrepancy has been attributed to the anomalous behavior between various elastic properties and calculated dissociation energy per unit volume. Finally, not only Rocherulle et al. model [1989] is valid for majority of the investigated glasses, but also the correlation ratios between theoretical and experimental elastic moduli are better than those reported previously when compared the same experimental elastic moduli with the theoretically calculated ones on the basis of Makishima-Mackenzie’s theory [1973, 1975].