Comparison Test Of Ultra High Temperature Combustion Between Aerogels And Other Common Insulation Materials
Comparison test of ultra high temperature combustion between aerogels and other common insulation materials
China is leading third technologies in the field of high technology in the world. This is aerogel. What is the aerogel? In general, it is a solid material with many lots of gaps in it, so it is very light and very low in density.
This material was first discovered in 1931 and was developed by scientists in Europe. The material used at the time was silicon dioxide, at that time the weight was slightly far from the level of modern technology, when people gave such a material a name called solidified smoke. This material really entered the field of vision in 2011. In 2011, the American science team made a kind of aerogel with nickel, which in a vacuum environment, the mass of only 0.9 milligrams per cubic centimeter, much lighter than the same volume of air. In 2012, the United Kingdom and Germany jointly developed a carbon aerogel material. Its density is lower than that of the aerogels developed in the United States. It is only 0.18 milligrams per cubic centimeter, and it is very strong, sturdy, rock shattered, and second is waterproof. In 2013, China made aerogels using carbon materials, called carbon sponges, with a density of 0.16 milligrams per cubic centimeter, equivalent to 1/7 of air density, and 0.12 milligrams per cubic meter in 2015. A centimeter of aerogel. It is also widely used, first in the aerospace field, it can adsorb interstellar dust, as well as thermal insulation and other uses, using its characteristics to play in various fields.
SiO2 aerogel composites were obtained by drying amorphous carbon and substrate and drying them in supercritical carbon dioxide fluid. It can effectively reduce the high brittleness of the aerogel itself and enhance the valence bond structure between the substrate and the base material. It can be widely used in the thermal insulation fields such as building, petrochemical, pipeline, precision instrument and so on.
Aerogels have super thermal insulation properties. Let's compare a group of combustion experiments and see their temperature and thermal conductivity. First of all, the temperature of our alcohol burner is about 1200 degrees, and the thermometer tests the surface temperature of them.
We use the common thermal insulation materials on the market to carry out the experiment, there are dense amine foam cotton, the temperature yarn on the car, ordinary foam board, building rock wool, ordinary insulation glass fiber, and the aerogel insulation blanket and aerogel board we produce.
Test results of aerogel thermal insulation material:
1, melamine foam, 10 seconds surface temperature of 90 degrees Celsius.
2, the temperature yarn produced the flame quickly and has been ignited.
3. The contact of the foam plate is flammable and has been ignited.
4, the rock wool used in construction is white, and it is ignited by contact.
5, glass fiber, 10 seconds, the surface temperature of 90 degrees Celsius.
6, ordinary insulation felt, 20 seconds, the surface temperature of 70 degrees Celsius, produce pungent odor.
7. After 5 minutes of combustion, the surface temperature is still 35 degrees Celsius. After burning for 10 minutes, the surface temperature reaches 42 degrees Celsius.
Of course, the thermal effect of aerogel is very concerned, and it is also widely used in this field. When the aerogel is injected into the base material, it can play a lot of functions, such as fire resistance, insulation, insulation, sound insulation and so on. It will be used in the future.