Ultrasonic studies on network structure of ternary TeO 2–WO 3–K 2O glass system

Abstract

Longitudinal and shear ultrasonic velocities were measured in different compositions of the glass system (TeO 2) 80–(WO 3) (20− x) –(K 2O) x using pulse echo technique. Measurements were carried out at 6 MHz frequency and at room temperature. Elastic moduli and some other physical parameters such as, glass transition temperature, Debye temperature, softening temperature, and fugacity have been calculated. Results indicated that these parameters depend upon the alkali oxide modifier (K 2O) content i.e., glass composition. Quantitative analysis has been carried out, in order to obtain more informations about the structure of these glasses, based on bond compression model, and ring deformation model, i.e., the cation-anion bond of each oxide.