Samir Y Marzouk
Ultrasonic velocity and elastic moduli of heavy metal tellurite glasses
Longitudinal and transverse ultrasonicwaves velocities in lead tungsten tellurite glasses have been measured using the pulse-echo method at 5MHz frequency and at room temperature (300 K). The elastic properties longitudinal modulus, shear modulus, Young’s modulus,bulk modulus and Poisson’s ratio together with the microhardness, softening temperature, and Debye temperature are found to be rather sensitive to the glass composition. Information about the structure of the glass can be deduced after calculating the average stretching force constant and the average ring size. A comparison between the experimental elastic moduli data obtained in this study and those calculated theoretically by other models has been discussed.