
Cesium tungsten bronze nanopowder is a kind of infrared thermal insulation nano material, which can be applied in the form of transparent heat-insulating film for building energy efficiency. Energy on the earth comes from the sun’s radiation. Electromagnetic waves are the form of energy delivered by the sun. The “Energy Distribution of the Solar Spectrum” is shown in the figure below. As can be seen from the figure, in the total solar radiation energy, the ultraviolet with wavelength in the…