Silica aerogel is obtained by chemical solution reaction, forming sol first, and then gelThe gel obtained by removing the solvent in the gel is filled with gas,A porous material with a solid density (close to air density) on the surface. Aerogel is currentlyKnown as a lightweight solid material and the material with insulation performance to date, silicon dioxideThe thermal insulation performance of aerogel has extensive and huge application value in many fields, known asThe magical material that changes the world.