Acoustic properties of lead-vanadate glasses

An investigation of the acoustic velocity and acoustic attenuation of lead-vanadate glasses has been conducted. The study used ultrasonic methodology in temperatures ranging from 80 to 300 degrees Kelvin. The observed temperature dependence in attenuation can be rationalized in terms of relaxation process that is activated thermally while the velocity variation is attributed to the microscopic inhomogeneity of elasticity in glasses that is caused by anharmonicity, relaxation and frozen-in fluctuations.