Influence of aerosol formation mechanism by an ultrasonic field on particle size distribution of ceramic powders

摘要

Aerosol droplet genesis by ultrasonic atomization has been theoretically studied using a model for three-dimensional spherical/ellipsoidal waves generated by excitation of a system of given geometry by forced frequency of an ultrasonic oscillator. Analyzing the harmonic function of the rate potential, an equation has been derived that defines the mean diameter and the distribution spectrum of aerosol droplets formed at the surface of a liquid. Comparison has been made between the calculated valuesfor the mean particle sizes and their distribution with those obtained experimentally for Al{sub}2O{sub}3, mullite and cordierite powders synthesized from different precursors.