Nano particle size tungsten trioxide may be used for the preparation of heat insulation coating. The coating is prepared by a special production process using tungsten trioxide nano-slurry as raw material. It not only has the full ding of the glass coating, but also has the outstanding heat insulation effect. And therefore, the surface temperature of buildings can be reduced by more than 15-30 degrees. And such thermal insulation coating of tungsten trioxide is mainly used in glass windows and…