THEORETICAL-ANALYSIS OF ULTRASONIC WAVE ATTENUATION AND ELASTIC-MODULI OF TELLURITE GLASSES

The shape of the loss peaks of ultrasonic attenuation in the range 120 -300 K for binary molybdenum tellurite glasses (i.e., the shape of the relaxation spectra), the mean activation energy, and the elastic modu li at room temperature are strongly composition sensitive. The composi tion dependence of the position and overall shape of the loss peaks an d the mean activation energies were analysed and correlated with the b ulk modulus and the mean cation-anion stretching force constant. Also, the mean activation energy VBAR has been found to be strongly depende nt upon the value of the oxygen density.