Cs0.32WO3 particles, or cesium tungsten bronze nano particles, may be applied for producing near-infrared shielding material such as thermal insulating film and heat insulating coating, and thus be applied to shield heat (near-infrared light) and ultraviolet light from the sunlight for the architectural glass, such as, all the glasses of the sunlight room. Among them, some experts observed the raw material Cs0.32WO3 nano powder obtained by hydrothermal treatment under different conditions.
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Experts observed TEM images of Cs0.32WO3 powder, which was prepared by hydrothermal treatment under the conditions of 5mol/L acetic acid and n (W): n (F) =1:0.45, respectively. They found that the morphology of cesium tungsten bronze nano powder was not changed after heat treatment of acetic acid and HF. That is, large grains, which may appear in H2 heat treatment, were not appeared in such process. In a word, this process is very advantageous for improving the dispersibility and transparent heat insulation property of the cesium doped tungsten bronze powder.