Cs0.33WO3 nanoparticles may be applied for producing thermal insulation dispersion liquid, which is more and more widely used in the production of heat insulation film. And the film may be used in building glass with the characteristics of high transparency, high UV resistance and environmental protection.
In the development process, some experts used Cs0.33WO3 nanoparticles for heat treatment at different temperatures for 2h under air atmosphere, and used the obtained powder to prepare the films. The near-infrared shielding properties of the prepared films were also characterized.
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The experts observed the transmittance spectra of Cs0.33WO3 films prepared before and after air atmosphere annealing at different temperature for 2h. And they found that the light transmittance of the powder heat-treated at 200°C is not significantly changed in the visible light region and the near-infrared region. And the light transmittance of the powder heat-treated at 400°C in the visible light and near-infrared regions is greatly increased. That is to say, the high-temperature heat-treated cesium tungsten bronze powder has a high visible light transmittance and a high shielding ratio in the near-infrared region. Therefore, the dispersion prepared and the subsequent produced thermal insulation film will also inherit the characteristics of the nano grain size cesium tungsten bronze raw material.
