Preparation of SiO2-TiO2 aerogels using supercritical impregnation

Satoshi Yoda, Katsuto Ohtake, Yoshihiro Takebayashi, Tsutomu Sugeta, Takeshi Sako, Tsugio Sato

研究成果: Conference article査読

25 被引用数 (Scopus)

抄録

The preparation of SiO2-TiO2 aerogels by supercritical impregnation of titanium alkoxides into silica alcogels was investigated. A mixture of CO2 and 2-propanol with dissolved titanium tetraisopropoxide modified with acetylacetone was used as the impregnation medium. Prior to the experiments, the supercritical behaviour of the impregnation solution was investigated. The microstructure and properties of aerogels prepared by the supercritical impregnation method were almost identical to those generated by the liquid impregnation. However, the time for impregnation was substantially decreased and the homogeneity of the impregnated titanium distribution on the aerogel increased.

本文言語English
ページ(範囲)719-723
ページ数5
ジャーナルJournal of Sol-Gel Science and Technology
19
1-3
DOI
出版ステータスPublished - 2000 12
イベント10th International Workshop pn Glass and Ceramics, Hybrids and Nanocomposites from Gels - Yokohama, Jpn
継続期間: 1999 9 201999 9 24

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Chemistry(all)
  • Biomaterials
  • Condensed Matter Physics
  • Materials Chemistry

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