Characterisation of colloidal dispersions using ultrasound spectroscopy and multiple-scattering theory inclusive of shear-wave effects

摘要: Abstract Ultrasonic spectrometry measures the attenuation of a sound wave propagating through sample. In slurries ultrasound signal becomes highly attenuated as function particle size, concentration and density. To monitor these properties in requires interpretation using mathematical model. We examine different sizes silica suspended water, at concentrations, frequencies up to 100 MHz. determine that new multiple scattering theory inclusive shear-wave reconversion effects (i.e. conversion compressional shear back particle/liquid boundary) is successful for prediction range ≈20 MHz 20% (by volume). Beyond this level model with shear-effects begins deviate from real attenuation, but still more representative experimental results than modelling only an incident wave. Thus, essential accurately reflect spectra solid suspension system, dictates ultrasonic decrease increases.