How Aerogels Go To The World
How aerogels go to the world
Aerogel is a material with an air content of 99.8%. Aerogel have porous solid networks containing cavitation, which occupies most of the space in the material. Because of the lack of solid material, Sale aerogel have almost no weight.
Why is aerogel so low in thermal conductivity and adiabatic?
From the way of heat transfer, we can see that two heat transfer modes have been blocked in three forms of heat conduction. Conduction and convection are the two ways of heat transfer, and the aerogel is made up of most of the insulating air, and the micromeshed network prevents the flow of gas. The conduction and convection are well done. The thermal conductivity of the air is about 25 mW/m. K, while the thermal conductivity decreases to about 5 mW/ in the pores of 30 nanometers. M. K. Thus the effect of thermal insulation is achieved.
Silica aerogel is a particularly good insulator to prevent conduction, which is the basic characteristic of non-metallic inorganic materials.
So how is the aerogel made?
Silica aerogel is usually synthesized by sol-gel method. The first is to create a colloidal suspended solid particle known as "Sol". During the aerogel drying process, keeping the aerogel intact, the liquid around the silica gel network was carefully removed and replaced by air. A gel that evaporates at a natural rate is called xerogel.
Application of building and building insulation
The technical problem of the challenge of modern architecture is to do well in the smallest space. So thick traditional thermal insulation material can't meet the status quo. It is unavoidable to give out the building space. It not only affects the integrity of the building, but also reduces the living standard of the users. Today, the house price is soaring, it can be used. Saving space can save a large amount of money.
Which parts of the building need heat insulation?
Inside and outside the walls, floors, ceilings, Doll Merce and sloping roofs, and doors, windows, household hot and cold water pipes.
Silica aerogel has the potential to become the most ideal thermal insulation material for twenty-first Century. In ordinary applications, we will inject silica aerogel into fiber mats to facilitate field use.
The aerogel blanket has the characteristics of soft, easy to cut, small density, inorganic fireproof, whole hydrophobicity, green environmental protection and so on. It can replace glass fiber products, asbestos insulation felt, silicate fiber products and other traditional flexible insulation materials, which are poor in environmental protection and poor thermal insulation.