Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1995-01-05
1997-11-11
Fiorilla, Christopher A.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264 41, 264 42, 264 49, 264 50, B29C 6500
Patent
active
056860315
ABSTRACT:
An improved, rapid process is provided for making microporous and mesoporous materials, including aerogels and pre-ceramics. A gel or gel precursor is confined in a sealed vessel to prevent structural expansion of the gel during the heating process. This confinement allows the gelation and drying processes to be greatly accelerated, and significantly reduces the time required to produce a dried aerogel compared to conventional methods. Drying may be performed either by subcritical drying with a pressurized fluid to expel the liquid from the gel pores or by supercritical drying. The rates of heating and decompression are significantly higher than for conventional methods.
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Coronado Paul R.
Hopper Robert W.
Hrubesh Lawrence W.
Poco John F.
Fiorilla Christopher A.
Grzybicki Daryl S.
Regents of the University of California
Sartorio Henry P.
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