Ultrasonic investigations of PbO–V2O5–P2O5 glass

• DOI: 10.1063/1.368412
• Publication Date: 2002-07-26T13:54:59Z
• Authors: A. Paul; A. K. Chattopadhyay; C. Basu
• Keywords: 0103 physical sciences; 01 natural sciences

The velocity and attenuation of longitudinal and transverse ultrasonic waves in (PbO)x–(V2O5)y–(P2O5)1−x−y glass systems of different compositions have been measured at temperatures between 80 and 300 K using the ultrasonic pulse echo overlap technique at 10 MHz. For each sample the velocity data have been used to find the elastic moduli and Debye temperature at different temperatures. The results indicate that for each sample, the velocities decrease slowly and steadily with increasing temperature. The temperature dependence of ultrasonic attenuation has been explained in terms of a thermally activated relaxation process. On the other hand, the combined effect of relaxation, anharmonicity, and the effect due to frozen-in fluctuation is taken into consideration to explain the variation of velocity with temperature.