APPLICATION OF ULTRASONICS AS A MEANS OF PARTICLE-SIZE CONTROL

Ultrasound was investigated as a means of controlling the particle siz e of solids suspended in liquids. The technique was evaluated regardin g the shape and surface characteristics of the processed material, as well as its particle size and particle size distribution. The factors affecting the process, such as the type of material, the type and cons titution of the suspending medium, the presence of surfactants, the in tensity of insonation and the time of exposure, were also studied. Ult rasound was found to be an efficient technique for the particle size c ontrol of suspensions. It gave uniform particles with a very narrow ra nge of particle size distribution.