First, what is the heat insulation principle of aerogel
The thermal insulation principle of aerogel is the infinite shielding effect, no convection effect and infinite loose path effect brought by its independent structure.
1. Infinite occlusion effect
The aerogels have nanoscale pores and the aerogels themselves have extremely low density. The pores in the aerogels tend to be "infinite", and each pore wall has the effect of shielding the hot plate, thus producing an effect close to "infinite shielding the hot plate", so that the thermal radiation is minimized.
2, no convection effect
The diameter of pores in aerogel nanomaterials is less than 70nm, and the air molecules in the pores lose the ability to flow freely, and are in an approximate vacuum state, which can not carry out heat convection.
3, infinite loose path effect
Aerogel has a very low density, larger than the surface and loose bulk skeleton. Aerogel has an infinite number of nano pores, and heat is conducted along the pore wall in the aerogel solid material, and an infinite number of pore walls constitute the "infinite loose path" effect, which reduces the solid heat conduction ability to close to the minimum limit.


Second, How many degrees of aerogel temperature resistance
Aerogel is a kind of milky white solid material, the inner space is a nanoscale network pore structure, and the filling medium is air. The smallest thermal conductivity in the heat conduction is the air, coupled with the special structure inside the aerogel, so that the thermal conductivity is further reduced, so it is an excellent thermal insulation material, a one-centimeter thick aerogel, equivalent to 10 pieces of ordinary glass insulation effect. And the aerogel density is low and the weight is light, and the current lightest aerogel air content is more than 99%, almost no difference with the weight of air. The air in these special structures scatters less sunlight, so the aerogel acts like blue smoke in the sun, and a gust of wind can blow it away. Aerogel looks like "weak", in fact, it is very durable, it can withstand the equivalent of its own mass of thousands of times the pressure, can withstand up to 1,400 degrees Celsius high temperature. Because of these properties, aerogel has become an irreplaceable material in space exploration, and the Russian "Peace" space station and the United States "Mars Pathfinder" probe have used it for thermal insulation.