New ultrasonic dispersion method for nanoparticles using cylindrical piezoelectric transducer

Dispersion of powders into liquids has become one of the most important techniques in high-tech industries and it is a common process in the formulation of various products, such as paint, ink, shampoo, beverages, and polishing media. In this study, an ultrasonic system with a cylindrical transducer is newly introduced for pure nanoparticles dispersion. The acoustics pressure field and the characteristics of the shock pulse caused by cavitations are investigated. The frequency spectrum of the pulse from the collapse of air bubbles in the cavitations is analyzed theoretically. It was confirmed that Al₂O₃ suspension can be dispersed effectively using the suggested system.