New Energy-saving Building Material: Cesium Tungsten Bronze Composite Material

Cesium tungsten bronze composite material is a new energy-saving building material that combines the characteristics of cesium tungsten bronze and paraffin wax. Wherein, cesium tungsten bronze, such as Cs0.33WO3, has high visible light transmittance and excellent near-infrared shielding performance. However, Cs0.33WO3 also has a high efficiency of solar energy photothermal conversion (~73%). When receiving sunlight, it will efficiently convert the absorbed solar energy into thermal energy, causing Cs0.33WO3 to overheat and cause strong secondary thermal radiation, thereby influencing the further improvement of material properties.

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Therefore, some experts have developed a new type of building energy-saving material – a composite material of cesium tungsten bronze and paraffin wax. Combining two functional materials can not only solve the overheating of Cs0.33WO3, but also efficiently capture and use solar energy. Specifically, Cs0.33WO3 can convert the infrared light absorbed during the day into thermal energy and exist in the phase change of materials - paraffin wax; and at night, the paraffin wax will release the thermal energy. Therefore, the composite window is suitable for areas where the temperature fluctuates greatly day and night. And this new energy-saving building material - cesium tungsten bronze composite material is expected to greatly improve the energy efficiency of buildings.

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