DIELECTRIC CERAMIC PREPARED FROM (Ba, Sr)TiO₃ NANOPOWDER UNDER MICROWAVE IRRADIATION

The reaction conditions of size-controlled BaTiO₃ nanopowder prepared by microwave irradiation have been investigated. It has found that the dosage of alkali, reactant concentration and reaction time are very important factors that affect average grain size of BaTiO₃ powder. Through these investigations, we synthesized adulterated BaTiO₃ nanopowder from an aqueous solution of barium hydrate and titanium tetrachloride, and use microwave irradiation as a heating source. XRD of the series of the nanometer powder demonstrates that pure and adulterated BaTiO₃ of cubic system has been prepared. Through TEM we found the products have a shape of uniform, substantially spherical particles with an average grain size to be 70 nm.