What is Aerogel?
The most common type of aerogel, silica aerogel, is derived from a solgel reaction in which the liquid filled pores have been replaced with gas. This results in an extremely low-density solid that can be imparted with several remarkable properties such as hydrophobicity.
Why is Aerogel a Good Thermal Insulator?
The solid component in silica aerogel consists of tiny, three-dimensional, intertwined clusters. They comprise only 3% of the volume and are very poor conductors. Air in microscopic pores make up the remaining 97% of aerogel’s volume. This air has very little room to move, inhibiting both convection and gas-phase conduction. These characteristics make aerogel the world’s lowest density solid and most effective thermal insulator.
How aerogels work
Aerogel is a special material with a very low density and highly porous structure. Its working principle can be explained in the following aspects:
Overall, aerogels work based on their low density, porous structure and high specific surface area. This gives aerogels many unique properties, giving them broad application prospects in many fields.
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