Cesium tungsten bronze can be made into Cs0.33WO3-SiO2 composite sol, and then coated on a blank glass to obtain glass coating with high heat insulation performance and high transparency. Then, the coated glass and blank glass are combined into a glass tank, and molten paraffin wax is poured into the glass tank to obtain a new energy-efficient window.
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When the sun is strong, the composite window can absorb infrared light through the Cs0.33WO3-SiO2 coating to reduce infrared light from entering the building and reduce the building's thermal load. At the same time, paraffin wax absorbs the heat generated by Cs0.33WO3 by sun light through the phase change process, preventing the Cs0.33WO3 coating temperature from rising rapidly. When the ambient temperature is low enough, the paraffin wax undergoes a solidification phase change, gradually releasing the stored heat energy, and slowing down the temperature drop in the room. Therefore, this Cs0.33WO3-paraffin wax window can effectively maintain the stability and comfort of the indoor temperature of buildings regardless of day and night.
