Tungsten trioxide nanopowder may be used to prepare a transparent heat-insulating film and thus be applied to the architectural glass to obtain an environmentally-friendly transparent heat insulation glass. This new type of thermal insulating glass not only has a heat-insulating effect, but has a heat preservation effect. In addition, it can shield most of the ultraviolet rays, thereby reducing the damages of indoor objects due to the exposure to UV rays.

Yellow tungsten oxide may be applied for producing a heat insulation film and therefore be used to building glass to obtain a transparent heat insulation glass. And such glass can easily create a bright and comfortable working and living environment.

WO3 may be used to prepare a heat insulating film and therefore be applied to the building glass to obtain an environmentally friendly smart glass – a transparent heat insulation glass. Although the obtained thermal insulating glass is transparent, it still has a one-way perspective function. That is to say, the glass can be applied to places such as toilets and shower rooms where require special requirements for privacy.

Tungsten oxide is an important raw material for obtaining a transparent heat insulation glass. First, the tungsten trioxide nanoparticles are used to make a transparent heat insulating dispersion. The obtained dispersion is prepared into a transparent heat-insulating coating. And then the coating is sprayed onto the building glass such as balcony glass to obtain a heat insulating glass. That is to say, the tungsten trioxide heat-insulating coating is present on the balcony glass in the form of a thin heat-insulating film.