“Aerogel” simply refers to a gel structure that contains a lot of air (the definition of gel is to form a substance with a three-dimensional network structure using the condensation of molecules, and the system includes organics, inorganics, and organic-inorganic composites) At present, the aerogels on the market are mainly based on the aggregation and stacking of inorganic silica molecules into nano-to-submicron primary aggregation molecules, and then , the primary aggregate molecules are condensed to form secondary particles. Ordered three-dimensional network structure. Metric-scale silica aggregate molecules already contain more than 60% nanoscale pores, with numerous microscale pores between the three-dimensional network structure. is occupied by a solvent; at this stage the properties of the product become something like herbal jelly or jelly, hence the name “wet gel” or “gel” for short. Drying technology or special atmospheric drying technology is used to evaporate and remove the solvent in the wet gel.While preserving the volume of the aerogel, this solvent-laden pore evaporates and the solvent is released into the air. It is called “aerogel” because it changes.