Journal of Materials Science

, Volume 35, Issue 19, pp 4971–4976

Synthesis of low-density silica gel at ambient pressure: Effect of heat treatment

  • Shin-Kyu Kang
  • Se-Young Choi
Article

DOI: 10.1023/A:1004842728314

Cite this article as:
Kang, SK. & Choi, SY. Journal of Materials Science (2000) 35: 4971. doi:10.1023/A:1004842728314

Abstract

A silica gel with the density of 0.2 g/cm3 and porosity of 90% was synthesized. The silica wet gel was dried and heat-treated under the ambient pressure after modification of the surface by TMCS. The specific surface area and total pore volume of the dried gel increased with increasing heat treatment temperature and represented the maximum value of 1050 m2/g and 3.2 cm3/g, respectively, under 350 °C. The surface characteristic of the gel was hydrophobic when heat-treated in nitrogen and converted to hydrophilic after heat-treatment in air. As the result of pore characteristics, and microstructure of gel, the properties of the gel were considered to be similar to those of conventional aerogel.

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Shin-Kyu Kang
    • 1
  • Se-Young Choi
    • 1
  1. 1.Department of Ceramic EngineeringYonsei UniversitySeoulKorea