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Unformatted text preview: Aerogels
Recipe Features Additional Information Recipe
Ingredients Precondensed silica (Silbond H-5, TEOS, or equivalent) Catalyst (ethanol, water, aqueous ammonia or protic acid) Process Place material into autoclave filled with ethanol Pressurize at 750-850 psi with CO2 & Temperature at 5-10 (C) Use liquid CO2 to remove the ethanol Adjust pressure and temperature to critical points of CO2 Using drying process, finished product takes 12 hours to 6 days Features
Large internal surface area 400-1000 m3/g Support over 1500x own weight Mechanically strong Transparent / Optical clarity Good heat/sound insulator Extremely low density 0.003 g/cm3 Additional Information
Cost Disadvantage Types of Aerogels Reference
eande.lbl.gov/ECS/aerogels/satoc.htm www.mkt-intl.com/aerogels/ www.mrw.interscience.wiley.com/ueic/articles/ ...
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This note was uploaded on 07/07/2011 for the course MAE 315 taught by Professor Wu during the Spring '08 term at N.C. State.
- Spring '08