价格: 人民币 180.00/
Sio2 aerogel is a kind of lightweight nano-porous amorphous solid material with excellent thermal insulation performance, its porosity is as high as 80-99.8%, the typical size of the hole is 1-100nm, the surface area is 200-1000m2/g, and the density can be as low as 3kg/m3, the thermal conductivity at room temperature can be as low as 0.012W/(m.k). Because of these advantages that the sio2 aerogel materials have great potential for application in thermal, acoustic, optical, microelectronics and particle detection.
Before exploring more details regarding silica aerogels, we first provide an overview of the history of aerogel invention and its development. In the 1930s, Samuel Stephens Kistler first produced silica aerogels by formulating the idea of replacing the liquid phase by a gas with only a slight shrinkage of the gel. He prepared aerogels from many other materials, including alumina, tungsten oxide, ferric oxide, tin oxide, nickel tartarate, cellulose, cellulose nitrate, gelatin, agar, egg albumen, and rubber, which are out of scope of the discussion.