CrO_3 飽和水溶液の Al_2O_3 成形体への含浸及び加熱

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タイトル別名
  • Impregnation and Firing of Al<sub>2</sub>O<sub>3</sub> Compact with CrO<sub>3</sub> Saturated Solution
  • CrO<sub>3</sub>飽和水溶液のAl<sub>2</sub>O<sub>3</sub>成形体への含浸及び加熱
  • CrO3 ホウワ スイヨウエキ ノ Al2O3 セイケイタイ エ ノ ガンシン

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Conditions of the operation (impregnation method) of the impregnation-dehydration-heating (under 800°C) of the CrO3 saturated aqueous solution to Al2O3 compacts and the filling process of Cr2O3 to the basic materials have been investigated utilizing DTA-TG, XRD, SEM, and a Vickers hardness meter. In the heating operation of the Al2O3 compacts to which CrO3 is impregnated, CrO3 has produced only finely-powdered Cr2O3(≤0.5μm) at a temperature of more than 500°C and the said fine powders of Cr2O3 has caused increase of the filling weight to the compacts. In case of more than the number of the times of impregnation where the filling weight or Cr2O3 to the fired bodies is almost saturated, a densification layer of Cr2O3 was formed in the vicinity of the surface of the fired bodies. The densification layer in question exerts remarkable influence upon the hardness values of Al2O3-Cr2O3 fired body surface, and the fired body surface hardness has been determined in accordance with the degree of densification layer.

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