08-11-2012, 04:54 PM
Aerogel
Aerogels.pptx (Size: 102.58 KB / Downloads: 48)
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 ©
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
Mechanically strong
Support over 1500x own weight
Transparent / Optical clarity
Good heat/sound insulator
Extremely low density
0.003 g/cm3
Aerogels.pptx (Size: 102.58 KB / Downloads: 48)
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 ©
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
Mechanically strong
Support over 1500x own weight
Transparent / Optical clarity
Good heat/sound insulator
Extremely low density
0.003 g/cm3