Abstract: The spherical, solid BaTiO₃ powders with 0.5～2μm and uniform composition were prepared by the spray hydrolysis reaction method. The main factors on the preparation of solid and uniform composition powders are reaction temperature and time, and the concentration of dimethyl oxalate (DMO), which is the inter-precipitator. The optimum conditions for the preparation of ideal powders are that the reaction temperature is more than 85℃, and the time is more than 3s, and the concentration of DMO is more than 0.75 mol/L.

Key words: spray hydrolysis reaction, barium titanate, composite distribution, dimethyl oxalate