Abstract
Nanocrystalline BaTiO_3 powder could be synthesized by solid-state reaction using the mixture which was prepared by a high energy milling process in a bead mill for BaCO_3 and nanocrystalline TiO_2 powders mixture. Effect of the milling time on the powder characteristic of the synthesized BaTiO_3 powder was investigated. Nanocrystalline BaTiO_3 with a particle size of 50 nm was obtained at 800°C. High tetragonal BaTiO_3 powder with a tetragonality(=c/a) of 1.009 and a specific surface area of 7.6m2/g was acquired after heat-treatment at 950°C for 2 h. High energy ball milling was effective in decreasing the reaction temperature and increasing the tetragonality.
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