
Tungsten acid can be applied for the preparation of heat insulation coating. Then, this type of coating has good ding of shielding infrared rays, and therefore can be applied as thermal insulation film for buildings, automobiles, and the like. Shielding Principle of Infrared Rays Infrared rays (IR) have longer wavelengths than those of visible rays. IR wavelengths extend from the nominal red edge of the visible spectrum at 700nm, to 1mm. Heat insulation coating materials are mostly added with near-infrared…