Nanostructured ZrO2 powder synthesized by ultrasonic spray pyrolysis

The synthesis of nanostructured zirconia particles from aqueous colloidal dispersion of zirconia (zirconia sol) was carried out by ultrasonic spray pyrolysis method. The morphology of these nanostructured particles was characterized by scanning electron microscopy and transmission electron microscopy. The synthesized particles are spherical in shape with the avarage size of 400 nm, consisting of smaller primary particles, with the mean crystallite size of 7 nm. The tetragonal phase was confirmed by both X-ray and electron diffraction measurements