Theoretical analysis for ultrasonic properties of vanadate glasses over a wide range of composition

Abstract

The various ultrasonic properties of PbO-V2O5, MoO3-PbO-V2O5, P2O5-V2O5, and CuO-P2O5-V2O5 and TeO2-K2O-V2O5 glass systems were analyzed and predicted over a wide range of composition. The theoretical elastic moduli and Poisson's ratio were evaluated on the basis of Makishima–Mackenzie's theory and Rocherulle et al. model and compared with the corresponding experimental ones. The composition dependence of ultrasonic attenuation coefficient in PbO-V2O5 glasses has also been analyzed and predicted, for the first time, using Abd El-Moneim's semi-empirical formula, which correlates the room temperature ultrasonic attenuation coefficient with the packing density, dissociation energy per unit volume and average first-order stretching force constant. The results revealed that:i-The agreement between theoretical and experimental elastic moduli of P2O5-V2O5, CuO-P2O5-V2O5 and TeO2-K2O-V2O5 glasses is excellent for majority of the samples;ii-The correlation between theoretical and experimental elastic moduli of PbO-V2O5 and MoO3-PbO-V2O5 glasses is improved significantly when the effect of the basic structural units VO5 and VO4 on the glass dissociation energy per unit volume is taken into account; andiii-Abd El-Moneim's semi-empirical formula for ultrasonic attenuation coefficient appears to be valid for PbO-V2O5 glasses. The correlation between ultrasonic attenuation coefficient, packing density and dissociation energy per unit volume was achieved through the average first-order stretching force constant of V–O–V linkages.