Fabrication of hollow silica aerogel micospheres using droplet generation technique and sol-gel process

Conference · Mon Oct 03 00:00:00 EDT 1988

OSTI ID:6774970

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

A system was designed to produce hollow silica aerogel microspheres by combining a droplet generation technique and a sol-gel process. In the system, a simultaneous passage of an alkoxide solution and a fill gas through a dual-nozzle system found a continuous stream of hollow drops in the fluid state. The spherical drops were then levitated in a basic atmosphere to convert them into a rigid state by an accelerated reaction of condensation. A supercritical drying was adopted to drive off any remaining organic solvent in order to form porous aerogel spheres. 14 refs., 6 figs.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6774970
• Report Number(s): UCRL-21120; CONF-881002-10; ON: DE89000673
• Resource Relation: Conference: 35. national vacuum symposium and 4th international laser science conference, Atlanta, GA, USA, 2 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
SILICA GEL
SYNTHESIS
SILICATES
CHEMICAL REACTION KINETICS
DROPLETS
DROPWISE CONDENSATION
DRYING
GASES
GELATION
HYDROLYSIS
MICROSPHERES
POROSITY
SOL-GEL PROCESS
ADSORBENTS
CHEMICAL REACTIONS
DECOMPOSITION
FLUIDS
KINETICS
LYSIS
OXYGEN COMPOUNDS
PARTICLES
REACTION KINETICS
SILICON COMPOUNDS
SOLVOLYSIS
VAPOR CONDENSATION
360601* - Other Materials- Preparation & Manufacture
400201 - Chemical & Physicochemical Properties