β€˜At room temperature, the thermal conductivity of SiO2 aerogels can reach 0.013~0.016W/(M*K).(the thermal conductivity of static air is 0.024W /(M*K). Even at a temperature of 800℃, its thermal conductivity is only 0.043W/(M*K).’ [14]It is the best solid material with the best thermal insulation. Specific applications cover the area of scientific research, industry, national defense and daily life, especially the aviation, navigation, construction and other thermal insulation places.