Abstract
In order to investigate the ultrasonic echo characteristics, a series of oil–water emulsion samples are prepared. The water fraction of the samples is in the range of 0–100%, the stirring speed is set to be 500, 1000, 1500, and 2000r/min, respectively. The ultrasonic measurement was operated in pulse-echo mode. The ultrasonic velocity and attenuation of the samples are measured and analyzed. The results have shown that with the increase of water fraction, the sound velocity tends to increase. The attenuation coefficient is very sensitive to the distribution of the emulsion droplets. Maximum attenuation loss occurred around the phase inversion point, where multiple emulsion is formed. The study has shown a potential to apply the attenuation coefficient for the characterization of emulsion phase inversion.
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