In recent years, aerogels have gradually appeared in the eyes of the public because of their excellent thermal insulation properties and the vigorous promotion of the country. For new products, there is nothing wrong with vigorously promoting, but exaggerating publicity will lead users to a misunderstanding.
After seeing this figure, we are also a little confused, although the aerogel insulation material began to popularize the commercial stage, but such publicity is really good? At present, the mainstream aerogel felt generally uses glass fiber needled felt as the base material, and glass fiber needled felt begins to soften at 650 ° C, so it can be said that the normal use temperature of products using glass fiber needled felt as the base material of aerogel felt is below 650 ° C. If you choose to use high-silicon fiber needle felt as the base material of aerogel felt, can be used below 1000℃. It is not clear from the picture what kind of substrate is used, so there is nothing wrong with the publicity that the temperature can withstand 1000 ° C. Aerogel felt below 400 ° C is a recognized insulation material with very good thermal insulation performance, 400 ° C ~1000 ° C has a better microporous nano thermal insulation material, is a branch of the aerogel family, it is recommended that users choose the corresponding thermal insulation material according to the temperature range.
Secondly, after using 6mm aerogel felt, 1000 ° C heat insulation into 100 ° C, not only our Utsen aerogel products, the current market aerogel felt can not temporarily achieve this effect. It should be known that the thermal insulation effect of thermal insulation materials mainly depends on the thermal conductivity, according to the use of temperature, and then use scientific formulas to calculate the outer temperature of the insulation layer or the thickness of the insulation layer. The following examples will be used from 350 ° C thermal insulation surface 50 ° C requires an aerogel insulation layer of 20mm, the results in the actual test process and the results calculated by the formula are basically consistent. First, a ladder table of thermal conductivity of aerogel insulation materials at different temperatures is presented.

Aerogel thermal conductivity ladder
The aerogel thickness was calculated according to the corresponding formula
According to the aerogel thermal conductivity ladder table, we can know that the thermal conductivity of aerogel at 350 ° C is about 0.029W/(m·K), if you need to heat insulation from 350 ° C to 50 ° C, then you need an aerogel felt with a thickness of 20mm.
After popular science knowledge, I think you have a general understanding of the thermal insulation performance of aerogel, any data need to be calculated and practical test, if there are friends who believe that the use of 6mm aerogel can be separated from 1000 ° C to 100 ° C, that small series can only mean no words. Although aerogel is a better insulation material at present, it is not good enough to have the effect of exaggerated publicity.