エマルジョン-炭化法によるチタン酸バリウムの高純度球状微粉末の合成

概要

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Spherical BaTi0_3 fine powders were synthesized by emulsion-char method using titanium tetraisopropoxide, citric anhydride and barium carbonate as the aqueous phase, high boiling-temp. oi1 (Hi-CALL K-350) and low boiling-temp. oil (ISOPAR-M) as the organic phase and surfactant, Span 80 as the emulsifier. 0n preparation of emulsion of aqueous BaTi0_3 precursor solution, it was found that 1.22 gravity of the aquous solusion. 0.03 mixing ratio of aqueous solution/organic phase, 0.2 mixing ratio of high boiling-temp. oil/low boiling-temp. oil and 1.97 g/100 ml mixing quantity of the surfactant produced stable water-in-oil (w/o) type emulsions by mechanical stirrring. Spherical fine powders were produced from evaporation of the w/o emulsions. 0n preparation of sintered BaTi0_3, calcination temperature and sintering temperature were examined.
東京工芸大学の論文
2000-01-31