Fabrication of hollow silica aerogel spheres by a droplet generation method and sol-gel processing

N. K. Kim, K. Kim, D. A. Payne, R. S. Upadhye

Research output: Contribution to journalArticle

Abstract

A system was designed to produce hollow silica aerogel spheres by combining a droplet generation method with sol-gel processing. Simultaneous passage of an alkoxide solution and a fill gas, through a dual-nozzle system, formed a continuous stream of hollow droplets in the fluid state. The spherical droplets were levitated in a basic atmosphere containing ammonia which converted the sol into a rigid gel state. Supercritical drying was used for the elimination of residual solvents without shrinkage and cracking.

Original languageEnglish (US)
Pages (from-to)1181-1184
Number of pages4
JournalJournal of Vacuum Science and Technology A: Vacuum, Surfaces and Films
Volume7
Issue number3
DOIs
StatePublished - May 1989

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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