SYNTHESIS AND DEPOSITION OF ZNO BASED PARTICLES BY AEROSOL SPRAY-PYROLYSIS

Spray pyrolysis was used for the deposition of well defined submicroni c to nanosize particles based on ZnO. The influence of the temperature in the range from 345 to 1165 K, solution concentration (0.004 and 1. 5 mol dm(-3)) and the residence time on the particle morphology is dis cussed. X-ray diffraction, differential scanning calorimetry and scann ing electron microscopy were used in particle characterization. With t he presumption that certain particle morphology is formed during the e vaporation/drying stage of spray pyrolysis, the corresponding mathemat ical model for droplets evaporation is developed and correlated with t he empirical results. (C) 1997 Elsevier Science S.A.