Tungsten oxide may be used to prepare a transparent heat-insulating energy-saving film. In the hot summer, the new environmentally friendly heat insulation film can reduce heat inflow to reduce the use of air conditioning, thereby reducing electric charge and improving energy efficiency.

The heat-insulating energy-saving film prepared using tungsten trioxide as a raw material can be applied for the installation of glass doors and windows of the new building and the renovation of a large number of glass doors and windows of the old buildings.

Nano WO3 may be used to produce a heat-insulating energy-saving film, which is environmentally friendly with reliable explosion-proof performance. Nowadays, more and more people are aware of the importance of the safety, heat preservation performance and heat insulation performance of the living room. Therefore, when selecting the glass film of the living room, people consider the requirements for improving the safety and aesthetics of the thermal insulation film while considering improving the comfort of the room and reducing the energy consumption.

Nano yellow tungsten oxide may be used to prepare a new type of heat-insulating energy-saving film, which is environmentally-friendly for applying to the glass window and the glass door of the living room. Specifically, the prepared smart film of high thermal insulation performance has the following advantages: