Theoretically, the grain size, morphology and crystallinity of nano CsxWO3, such as Cs0.32WO3 nanoparticles for transparent thermal insulation material, have a great influence on its light absorption performance (heat insulation performance). Therefore, in order to better compare the crystallinity, some experts used SiC with less diffraction peaks and no coincidence with the Cs0.32WO3 nano powder diffraction peak as the calibration standard, and Cs0.32WO3 and commercial SiC powder with a purity of 99.9% were mixed according to a mass ratio of 1:2, and then uniformly ground in an agate mortar, and the mixed powder was quantitatively taken out for XRD characterization to correct the crystallinity of the sample.
According to the calibration results, when the Cs/W ratio is 0.1-0.5, the main diffraction peak of the target product Cs0.32WO3 increases with the concentration of Cs in the raw material, indicating that the crystallinity of the prepared Cs0.32WO3 increases with the increase of Cs concentration. When the Cs/W ratio is 0.5, the main diffraction peak is the sharpest with the highest intensity, which indicates that the crystallinity of Cs0.32WO3 synthesized under this condition is the highest. When the Cs/W ratio is 0.6, the intensity of the main diffraction peak begins to decrease, indicating that the crystallization degree began to decline.
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