Elastic, Spectroscopic and Thermal Analysis of B2O3-CDO Binary Glasses

Abstract

Borate based glass system of binary B₂O₃-CdO with different compositions are prepared by melt quenching technique.XRD, SEM, ultrasonic,FT-IR,and DTAstudies have been employed to study the modification caused by CdO on the structure of the prepared glasses.The absence of Braggpeaksin the XRD pattern confirms the amorphous and homogeneous nature of the glass samples.The SEM image clearly depicts that there is no crystalline phase existing in overall surface of the samples and also confirms the amorphous nature of the samples. The ultrasonic (both longitudinal and shear) velocities are measured using the Pulse Echo Overlap method. Density of the glass samples is measured by Archimedes principle using water as immersion liquid. From the measured data, the elastic moduli and other parameters such as molar volume, Poisson’s ratio, acoustic impedance, microhardness and Debye temperature have been evaluated and they are used to gain knowledge about the structural, mechanical properties and are correlated with the rigidity and compactness of the glass systems.IR spectroscopic studies have been carried out to explore the role of divalent cation in the structure of the studied glasses. The transition temperature(T_g), crystallization temperature(T_c)and melting temperature(T_m) is identified using Differential Thermal Analysis (DTA). The glass stability factor and Hruby’s parameter are calculated from above mentioned temperatures.