Preparation of Coated Particles by Injection Method

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  • NAKAMURA Hiroyuki
    Inorganic Materials Department, Kyushu National Industrial Research Institute, AIST, MITI
  • CHEN Yun-Fa
    Institute of Chemical Metallurgy
  • KIMURA Kunio
    Inorganic Materials Department, Kyushu National Industrial Research Institute, AIST, MITI
  • TATEYAMA Hiroshi
    Inorganic Materials Department, Kyushu National Industrial Research Institute, AIST, MITI
  • HIROSUE Hideharu
    Inorganic Materials Department, Kyushu National Industrial Research Institute, AIST, MITI

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  • インジェクション法による被覆粒子の合成
  • Preparation of Coated Particles by Inje

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Preparation of coated particles by an injection method was presented. The raw material of a coating layer is injected into a core particle suspension in which a precipitant is dissolved. By this method, some coated particles including titania hydrate-coated calcium carbonate powders and alumina hydrate-coated SiC whiskers were prepared. It was noticeable that CaCO3, which is soluble in the raw material of titania hydrate, could be coated with titania hydrate. Furthermore, it was shown that aluminum nitrate and aluminum chloride as well as aluminum sulfate were useful as the raw material salts. Homogeneous nucleation and coalescence of the homogeneous nuclei onto the coating layers were expected to be included in the coating process.

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