Quantitative analysis and prediction for acoustical properties of alkali borate glasses

Abstract

Acoustical properties of alkali borate Li2O–B2O3 and Li2O–PbO–B2O3 glasses were analyzed and predicted over a wide range of composition. The structural role of Li2O and PbO in these glasses has also been explored. The correlation between acoustical properties and the most significant composition and structural parameters was studied and interpreted by taking into account the coordination of boron atoms, total packing density of the glass, dissociation energy of the bonds, cross-link density and ring diameter of the glassy network. It has been found that the theoretically calculated values of packing density from Rocherulle et al. model are more suitable in predicting elastic moduli than those calculated from Makishima-Mackenzie's theory. Majority of Poisson's ratios are predictable from Makishima-Mackenzie's theory, bond compression model and Rocherulle et al. model. Moreover, correlations between bulk modulus and compositional parameters are achieved from Gopal et al., Rajendran et al. and Abd El-Moneim and Alfifi's approaches.