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AssigneeThe Regents of the University of California
InventorsThomas M. Tillotson, John F. Poco, Lawrence W. Hrubesh, Ian M. Thomas
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A two-step method is described for making transparent aerogels which have a density of less than 0.003 g/cm.sup.3 to those with a density of more than 0.8 g/cm.sup.3, by a sol/gel process and supercritical extraction. Condensed metal oxide intermediate made with purified reagents can be diluted to produce stable aerogels with a density of less than 0.02 g/cm.sup.3. High temperature, direct supercritical extraction of the liquid phase of the gel produces hydrophobic aerogels which are stable at atmospheric moisture conditions. Monolithic, homogeneous silica aerogels with a density of less than 0.02 to higher than 0.8 g/cm.sup.3, with high thermal insulation capacity, improved mechanical strength and good optical transparency, are described.
A two-step reaction method for making aerogels of a density less than 0.02 g/cm.sup.3, comprising:
A two-step reaction method for making silica aerogels of a density less than 0.02 g/cm.sup.3, comprising:
A two-step reaction method for making metal oxide aerogels of a density less than 0.02 g/cm.sup.3, comprising:
Dependencies are inferred from the claim text.