SIMULATION OF SPRAY-PYROLYSIS FOR CERAMIC POWDER PREPARATION

A mathematical model was developed for spray pyrolysis to produce holl ow spherical ceramic particles. The mechanism was established based on the previous experimental results. The transfer of mass, momentum, an d heat inside and around the aerosol droplets was considered simultane ously. Simulation was carried out to study the effects of operating pa rameters on the quality of derived particles. The simulated and experi mental results were in agreement and showed that: (a) raising the pyro lysis temperature increased the size and size distribution of resultan t particles, and decreased the specific surface area and the bulk dens ity; (b) lowering the concentration of starting solution decreased the size and size distribution of resultant particles, and increased the specific surface area and bulk density.