ボールミル付加した水熱合成によるBaTiO_3粉末の合成

概要

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The novel hydrothermal synthesis assisted with ball milling during hydrothermal treatment was developed. Barium titanate (BaTiO_3) powder prepared by this method and the effect of the ball milling was evaluated. The starting materials were sub-micron sized TiO_2 powder and Ba(OH)_2. The synthesized BaTiO_3 powders were characterized by X-ray diffraction (XRD), a laser scattering particle size distribution analyzer and a field emission scanning electron microscopy (FE-SEM). The XRD patterns showed that the BaTiO_3 powders were synthesized at 100℃ and for 5 h with little contamination. The present BaTiO_3 powders observed by FE-SEM were regularly agglomerated. The agglomerated particle size estimated from SEM micrograph was 152±42 nm, which corresponded to the particle size distribution measured by a lazar scatter method. Furthermore, as for BaTiO_3 synthesis from Ba(OH)_2 and sub-micron sized TiO_2 powder, the rate constant of BaTiO_3 powder fabricated from assistance of ball milling process was increased (2.5×10^<-2>), as compared to a conventional hydrothermal reaction.
社団法人日本セラミックス協会の論文
2006-07-01