Retarding and accelerating effects of aluminum on the growth of polysilicic acid particles

Takushi Yokoyama, Yoko Takahashi, Toshikazu Tarutani

研究成果: ジャーナルへの寄稿記事

16 引用 (Scopus)

抜粋

Retarding and accelerating effects of aluminum on the growth of particles of polysilicic acids were studied in the pH range 7-9 at 50°C by gel chromatography, spectrophotometry, and 27Al NMR. The effects depended on the pH and aluminum concentration. The greater retarding effect was observed at lower pH, while the greater accelerating effect at higher pH. It was concluded that the retarding effect is due to the formation of a negatively charged aluminosilicate site by substitution of aluminum for 4-coordinated silicon on polysilicic acid, and that the accelerating effect is due to the formation of unidentified aluminum species, which could not be detected by 27Al NMR, on the surface of polysilicic acid.

元の言語英語
ページ(範囲)559-563
ページ数5
ジャーナルJournal of Colloid And Interface Science
141
発行部数2
DOI
出版物ステータス出版済み - 2 1991

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

フィンガープリント Retarding and accelerating effects of aluminum on the growth of polysilicic acid particles' の研究トピックを掘り下げます。これらはともに一意のフィンガープリントを構成します。

  • これを引用