Aerogel felt is a flexible thermal insulation felt made by combining nano-silica or metal aerogel with carbon fiber, ceramic glass fiber, and pre-oxidized fiber felt through a special process. It features a low thermal conductivity, high-temperature resistance and fireproofing, as well as certain tensile and compressive strengths. It is a new type of thermal insulation material. 
I. Introduction to Aerogel Blankets 
Aerogel blanket is a flexible thermal insulation material synthesized by special processes, mainly composed of silica aerogel and combined with reinforcing fibers such as glass fiber and pre-oxidized fiber. 
Aerogel blankets have the lowest thermal conductivity among solid insulation materials within the temperature range of 400°C. (The thermal conductivity in the high-temperature zone of 400 to 1000°C is much higher than that of the micro-nano insulation series.) 
Aerogel felt features softness, ease of cutting, low density, inorganic flame retardancy, overall hydrophobicity, and environmental friendliness. It can replace traditional flexible insulating materials such as glass fiber products, asbestos insulation felt, and silicate fiber products, which are not environmentally friendly and have poor thermal insulation performance. 
II. Physical Properties of Aerogel Felt 
Thickness: 1 to 20 mm 
Width: 1.2, 1.5 meters 
Density: 160 to 240 kg/m³ 
Applicable temperature: -200℃ to 1000℃ 
Hydrophobicity: There are two types, hydrophilic and hydrophobic. 
Thermal conductivity: 0.015 to 0.025 W/(m·K) 
III. Advantages of Aerogel Blankets 
It has excellent heat insulation effect. 
The thermal insulation effect of aerogel felt is 2 to 5 times that of traditional insulation materials. When used in high-temperature pipeline environments, its service life is close to 20 years. 
2. Reduce the thickness of the insulation layer 
The thickness of aerogel felt required to achieve the same insulation effect is only 1/3 to 1/5 of that of traditional materials. After insulation, the heat loss is small and the space utilization rate is high. Moreover, the effect is even more remarkable at high temperatures. 
3. Hydrophobicity and flame retardancy 
Aerogel felt has relatively hydrophobic properties, effectively preventing water from entering pipelines and equipment. It also has fire resistance performance ranging from B1 to A grade. The unique three-dimensional network structure of aerogel prevents other insulation materials from sintering deformation and settlement during long-term high-temperature use. 
4. Convenient for construction 
Aerogel blankets are lightweight and easy to cut and sew to fit the insulation of pipes and equipment of various shapes, requiring less time and labor for installation. 
5. Lower transportation costs are saved. 
The smaller packaging volume and lighter weight can significantly reduce the transportation cost of insulation materials. 
IV. Application Fields 
Aerogel blankets are mainly used for thermal insulation in buildings, industrial pipelines, storage tanks, industrial furnaces, power plants, lifeboats, ship bulkheads, bullet trains, directly buried pipelines, injection molding machines, detachable insulation sleeves, high-temperature steam pipelines for heavy oil extraction, as well as in transportation, home appliances, steel, non-ferrous metals, glass and other fields.