Surface Properties of Silica-Adsorbed Magnesium Hydroxide

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Bibliographic Information

Other Title
  • シリカを吸着した水酸化マグネシウムの表面の性質
  • 水酸化マグネシウムと溶存シリカとの反応　ＩＩ　　シリカを吸着した水酸化マグネシウムの表面の性質

Description

Surface properties of magnesium hydroxide which adsorbed soluble silica were investigated in comparison with magnesium silicate gel. Surface area increased with increasing amount of adsorbed silica it was attributed to the formation of micropores. The formation of -Mg-OSi- bonds by the adsorption brought about an acidic nature on the surface. The total acidity (Ho< +3.3) also increased with increasing amount of adsorbed silica. The surface products formed by the adsorption were isolated by dissolving bulk magnesium hydroxide with an ammonium chroride solution, and their properties were examined by means of IR spectroscopy, DTA, X-ray diffraction, and chemical analysis. The properties were similar to those of magnesium silicate gel. It was presumed from the experimental results that more amounts of silica adsorbed than those to form a monolayer did not bond to the monolayer silica, but bonbed to the first layer of Mg atoms from the direction of bulk side or to the second layer of Mg atoms.

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1978 (11), 1457-1461, 1978-11-10

    The Chemical Society of Japan

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