The Effect of Impurities upon the Physical Properties of Silica Gel by the Heat-Treatment

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概要

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• The effects of various kinds of inorganic salts upon the physical properties of silica gel heated in the range up to 1200°C were studied. We measured the polymorphic behavior by means of X-ray diffraction, the simultaneous measurement of the differential thermal analysis, and the thermogravimetric analysis, and the specific surface area by means of the BET N<SUB>2</SUB> method and by means of studying the water-adsorption capacity. The cationic impurities which were found to have strong effects upon the physical properties mentioned above are Na<SUP>+</SUP>, K<SUP>+</SUP>, Ca<SUP>2+</SUP>, Pb<SUP>2+</SUP>, Cd<SUP>2+</SUP>, Zn<SUP>2+</SUP>, and Sb<SUP>3+</SUP>. Cations such as Al<SUP>3+</SUP>, Cr<SUP>3+</SUP>, Mn<SUP>3+</SUP>, and Co<SUP>2+</SUP> were shown to have weak but positive effects upon the physical properties of silica gel.

• 公益社団法人 日本化学会の論文

著者

• Kondo Seiichi

  Osaka University of Education

• Muroya Masaaki

  Osaka Electro-Communication University

関連論文

• The Thermal Behavior of Silanol Groups of Silica Gel as Studied by Infrared Spectroscopy. I
• The Effect of Impurities upon the Physical Properties of Silica Gel by the Heat-Treatment
• The Direct-current Conductivity of Silica Gel
• The Dehydration of Surface Silanol on Silica Gel
• The Dielectric Relaxation of γ-Alumina

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