Fabrication of hollow silica aerogel micospheres using droplet generation technique and sol-gel process
Conference
·
OSTI ID:6774970
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
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORBENTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
DROPLETS
DROPWISE CONDENSATION
DRYING
FLUIDS
GASES
GELATION
HYDROLYSIS
KINETICS
LYSIS
MICROSPHERES
OXYGEN COMPOUNDS
PARTICLES
POROSITY
REACTION KINETICS
SILICA GEL
SILICATES
SILICON COMPOUNDS
SOL-GEL PROCESS
SOLVOLYSIS
SYNTHESIS
VAPOR CONDENSATION
360601* -- Other Materials-- Preparation & Manufacture
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORBENTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
DECOMPOSITION
DROPLETS
DROPWISE CONDENSATION
DRYING
FLUIDS
GASES
GELATION
HYDROLYSIS
KINETICS
LYSIS
MICROSPHERES
OXYGEN COMPOUNDS
PARTICLES
POROSITY
REACTION KINETICS
SILICA GEL
SILICATES
SILICON COMPOUNDS
SOL-GEL PROCESS
SOLVOLYSIS
SYNTHESIS
VAPOR CONDENSATION