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学術誌査読

20 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)559-563
ページ数5
ジャーナルJournal of Colloid And Interface Science
141
2
DOI
出版ステータス出版済み - 2月 1991

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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