Effects of supercritical impregnation conditions on the properties of silica-titania aerogels

S. Yoda, K. Otake, Y. Takebayashi, T. Sugeta, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The preparation of silica-titania aerogel by supercritical impregnation of titanium isopropoxide (TP) or modified with acetylacetone (TPAA) using flow type apparatus was performed. The influence of the physical state of TP/CO2 TPAA/CO2 mixture was investigated. Homogeneous and rapid impregnation on monolithic silica alcogel was achieved using supercritical TP/CO2 or TPAA/CO2 mixtures at the single phase condition (353 K, 20 MPa). Crystallization of impregnated titania using this system was attained by increasing temperature during the depressurization process after impregnation.

Original languageEnglish
Pages (from-to)8-12
Number of pages5
JournalJournal of Non-Crystalline Solids
Volume285
Issue number1-3
DOIs
Publication statusPublished - 2001 Jun 1

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

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