Aerogel
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25-09-2010, 12:08 PM



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Aerogel

abstract
Aerogel is defined as a group of extremely light and porous solid materials. Silica-based aerogels are among the lightest ones, can be less than four times as dense as dry air, and some are nearly transparent, its nickname is “solid smoke” or “frozen smoke”.
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27-09-2010, 05:15 PM


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AEROGEL


PRATHIUSH SURESH NAYAK
1JS06ME032

abstract

Aerogels are a diverse class of porous, solid materials which exhibit an uncanny array of extreme materials properties
Silica Aerogel
Organic and Carbon Aerogels
Metal Oxide Aerogels
Metal Aerogel
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08-11-2012, 04:54 PM

Aerogel


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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
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