Cesium tungsten oxide for production of heat shielding material such as heat shielding film is mainly Cs0.33WO3 or Cs0.32WO3 nano powder. These nanoparticles have excellent near-infrared (NIR) shielding properties. You know, NIR shielding properties are important for heat shielding films. Well, do you know the effects of annealing on NIR shielding properties of Cs0.33WO3 thin films deposited by electron beam evaporation?
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Some experts prepared Cs0.33WO3 films using electron beam evaporation. And the prepared films were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, and spectrophotometry. The effects of annealing on NIR shielding properties and film microstructure were investigated. The results show that the NIR shielding properties of Cs0.33WO3 films can be improved by annealing at 300-450 °C under pure H2 atmosphere, the amorphous thin films being transformed to crystalline films. The Cs0.33WO3 films annealed at 450 °C in pure H2 atmosphere showed high transmittance of visible light (70%) and high NIR shielding ratio (85%).
