Abstract：To prepare uniform zirconia spherical particles with excellent flowability by spray drying process,CaO partly stabilized ZrO₂ was used as the main raw materials.The spherical particles with loose density of 1.945 g/cm³with excellent flowability were obtained.The results show that suspensions and spray-dried operating conditions have great influence on the properties of zirconia particles.When the atomizer frequency varies from 100 to 110 Hz and the rotate speed of pump varies from 15 to 20 r/min,the uniform particles have excellent flowability and little defects.

Keywords：spray drying;operating condition;loose density