
Tungsten oxide has the advantages of high transparency, high thermal insulation, and NIR-shielding performance so that it can be applied for window heat insulation film. Why window heat insulation film is necessary for building windows? 60% of the solar thermal energy enters the room through the window, while the general glass can only block 7% of the solar thermal energy, which makes the indoor temperature in the summer high within a certain temperature range, resulting in the frequent and lasting…