Preparation and properties of cobalt(II) hydroxide-(sodium fluoride tetrasilicic mica) intercalation complexes and of highly dispersed cobalt on mica.
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概要
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Cobalt(II) hydroxide–(sodium fluoride tetrasilicic mica) intercalation complexes were prepared by titrating cobalt(II) nitrate solutions in the presence of mica with sodium hydroxide under oxygen-free conditions. These complexes were characterized by chemical analysis, XRD, DTA-TGA, IR, and surface area measurements. These confirmed that the brucite-like cobalt(II) hydroxide sheet developed within the interlayer of the silicate. Cobalt atoms reduced at 400–700 °C by H<SUB>2</SUB> migrated from the interlayer of the silicate to the external surface of these where highly dispersed cobalt particles were formed. Ultra-fine cobalt metals (50–200 Å) with a hexagonal close-packed form were prepared at 400 °C by H<SUB>2</SUB>. The degree of reduction and the grain diameter of cobalt increased with an increase of the reducing temperature and/or the reducing time.
- 公益社団法人 日本化学会の論文
著者
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Ono Mikiya
Research & Development Laboratory Mitsubishi Mining & Cement Co. Ltd.
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OHTSUKA Kunio
Research & Development Laboratory, Mitsubishi Mining & Cement Co., Ltd.
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Takahashi Minoru
Department Of Appied Physics Tohoku University
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Suda Mitsuru
Research & Development Center, Ceramics, Mitsubishi Mining & Cement Co., Ltd.
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Koga Johji
Research & Development Center, Ceramics, Mitsubishi Mining & Cement Co., Ltd.
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Ono Mikiya
Research & Development Center, Ceramics, Mitsubishi Mining & Cement Co., Ltd.
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