Ultrasonic properties of V2O5P2O5 amorphous materials at different temperatures

摘要: Investigations are reported of the acoustical properties V2O5 P2O5 glass, on which other studies such as structural, spectroscopic, NMR and electrical conductivity have been in literature. In present investigation, velocity attenuation longitudinal transverse ultrasonic waves four different compositions (V2O5)x (P2O5)1−x glass system (x = 0.4769, 0.6020, 0.7487 0.8227) measured at temperatures ranging from 80 to 300 K with help an pulse echo apparatus operating 8 MHz frequency. The data used find elastic moduli Debye temperature for each composition. results indicate that composition velocities decrease slowly monotonically increasing a function shows broad peak shifts lower content increases. dependence has interpreted terms thermally activated relaxation process comes into play when wave disturbs equilibrium atom moving double-well potential network.