Evaluation of synthetic silica glasses by the ultrasonic microspectroscopy technology

Abstract

Ultrasonic microspectroscopy technology was applied to characterization of synthetic silica glasses. Acoustic properties (longitudinal and shear velocities, leaky surface acoustic wave velocity, and density), fictive temperature T f , chlorine concentration C(Cl), and OH concentration C(OH) were measured, and related relationships among their properties were discussed. The longitudinal velocities in the acoustic properties have the highest sensitivities of 5.93°C/(m/s), -202 wtppm/(m/s), and -31 wtppm/(m/s), with resolutions of 0.6°C, 20 wtppm, and 3.1 wtppm, to T f , C(Cl), and C(OH), respectively. The variations in the acoustic velocities due to T f , C(Cl), and C(OH) are mainly caused by variations in elastic constants, except for shear velocity due to C(OH).