Nano particle size cesium tungsten oxide, or cesium tungsten bronze nanoparticles or Cs0.32WO3 nanoparticles, may be used to prepare coating and be sprayed onto architectural glass to form a thin layer of window heat insulation film, and finally obtain heat insulating building glass.
In this regard, in order to make the raw material powder has good dispersibility and stability in the coating, the expert uses acetic acid and water as a solvent by low-temperature hydrothermal treatment to treat the Cs0.32WO3 powder. This process not only maintains the original grain size of the crystal to the greatest extent, but also facilitates the dispersion and stability of the powder in the coating.
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In addition, it can significantly improve the transparent heat insulation performance of the powder. The hydrothermal treatment under the coexistence of acetic acid and HF can greatly improve the transparent heat insulation performance of Cs0.32WO3 powder. And the maximum transmittance of visible light region is above 60%, especially at n (W): n (F) =1:0.45. The hydrothermally treated powder exhibits the best near-infrared shielding performance. And the transmittance is only 33.45% at 1100nm, which has the best transparent thermal insulation performance.
