Cesium tungsten oxide is a kind of transparent thermal insulation coating material with excellent near-infrared shielding performance and visible light transmittance, which is one of the main directions for the development of window heat insulation film in the future.
The window film is constructed of different layers of very thin heat insulation films. A layer of microscopic particles of cesium tungsten oxide within the film stops the near-infrared light before it goes through the glass and into the room.
In summer, the atmospheric temperature is above 30°C. And the temperature of the external surface of the building that is exposed to the sun for a long time continues to rise. The surface temperature of these building materials may reach 40-50°C such as cement, concrete, tile, metal, insulating brick, and glass, etc. And the temperature can even reach 60°C if the building material is color plate. Then, if the window heat insulation film of cesium tungsten oxide is applied in these architectural glasses, it will enable them to reflect most of ultraviolet and near-infrared light in the sunlight, preventing them from entering room, thereby effectively reducing indoor temperature, and not affecting daylighting.
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