Silica aerogel is a porous three-dimensional network solid formed by the interconnection of nano-sized silica particles. It is currently the lightest solid material known and possesses advantages such as low thermal conductivity, high porosity and large specific surface area. It is hailed as a new type of super insulation material. Silica aerogel has been successfully applied in various fields, including catalyst carrier materials, sound insulation materials, insulation and heat preservation materials, and toxic gas adsorption materials. 
Silica aerogel sheet 
Silica aerogel insulation blanket refers to an insulation and heat preservation blanket pad that is prepared by combining silica aerogel in the sol stage with a fiber reinforcing material, and then through processes such as gelation, aging, and drying. The silica aerogel insulation blanket is mainly applied in the field of insulation and heat preservation in buildings. Compared with traditional wall insulation materials such as rock wool, bricks, and fibers in the market, the aerogel blanket not only has excellent insulation performance, but also has corresponding mechanical strength, which can meet the requirements of insulation and strength for wall insulation. 
Silica aerogel coating 
Research on aerogel insulation and heat preservation coatings abroad began relatively early. In 1998, Schmidt et al. prepared aerogel insulation and heat preservation coatings by adding silica aerogel to the polyurethane film-forming agent. In China, Lu Bin from Central South University mixed silica aerogel with water-based acrylic resin to prepare insulation coatings for glass, and Gao Shuyi et al. mixed silica aerogel with epoxy resin to prepare aerogel composite materials. 
Silica aerogel energy-saving glass 
The excellent light transmission, insulation and noise reduction properties of silica aerogel give it significant advantages in the construction field, especially in the application of building glass. Due to the characteristics of heat absorption and reflection of glass curtain walls, they can also cause excessive energy consumption in buildings. However, if silica aerogel is added to the glass curtain walls, it can increase the building's insulation and heat preservation capabilities without affecting the original light transmission and aesthetics of the glass, thereby reducing the energy consumption of the glass curtain wall buildings.