Tungsten oxide nanopowder is a kind of transparent thermal insulation nanopowder, which may be applied to the glasses of buildings or vehicles in the form of heat-insulating film. And it plays the role of heat insulation and energy saving in this field. Thermal insulation glass of tungsten oxide is better than coated glass of other metals, non-metals and oxide films thereof as these glasses have a certain reflection effect on solar heat, which will seriously affect the transmittance of visible…