Ultrasonic wave propagation in the particle compounded gels - applicability of Urik's theory in suspensions

摘要

Ultrasonic wave properties ( attenuation and velocity ) in the particle compounded gels have been experimentally studied in the range from 1 to 30 MHz. Properties were precisely measured using an ultrasonic transmission technique. The particles used were talc, graphite, glass beads and polystyrene. The observed properties were in good accordance with the Urick's theory for viscous liquid suspensions, introducing the apparent shear viscosity. The applicability of the theory was carefully checked by changing the properties (particle diameter, density and elasticity) and the volume concentration of the particles.