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Title: Method for making monolithic metal oxide aerogels

Transparent, monolithic metal oxide aerogels of varying densities are produced using a method in which a metal alkoxide solution and a catalyst solution are prepared separately and reacted. The resulting hydrolyzed-condensed colloidal solution is gelled, and the wet gel is contained within a sealed, but gas permeable, containment vessel during supercritical extraction of the solvent. The present invention is especially advantageous for making metal oxides other than silica that are prone to forming opaque, cracked aerogels. 6 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
27697
Assignee:
Univ. of California, Oakland, CA (United States) PTO; SCA: 400201; 360601; PA: EDB-95:058527; SN: 95001354431
Patent Number(s):
US 5,395,805/A/
Application Number:
PAN: 8-036,997
Contract Number:
W-7405-ENG-48
Resource Relation:
Other Information: PBD: 7 Mar 1995
Research Org:
University of California
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; 36 MATERIALS SCIENCE; GELS; CHEMICAL PREPARATION; OXIDES; DENSITY; ALKOXIDES; CATALYSTS; CHEMICAL REACTIONS; HYDROLYSIS; SUPERCRITICAL GAS EXTRACTION