Cesium Tungsten Bronze Applied for Transparent Thermal Insulating Film

Cesium tungsten bronze for transparent thermal insulating film is cesium tungsten bronze nano powder, which is more and more popular with the development of nanotechnology and the wide application of transparent heat insulation materials. So, do you know how to prepare such a transparent thermal insulating film using cesium tungsten bronze nanopowder as a functional material? The following introduces a method for preparing cesium tungsten bronze.

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First, the experts prepared cesium tungsten bronze nano particles via solvothermal process at 350 °C using tungstic acid and cesium sulfate as raw materials, and sorbitol as the solvent. Next, the experts obtain the cesium tungsten bronze nano slurry with a D50 of 55.9 nm and a solid content of 30% (mass fraction) by a sand mill. Finally, the experts added the slurry to an acrylic emulsion and coated it on the surface of the polyester film to obtain a transparent film, that is, a transparent thermal insulation film with excellent infrared absorption characteristics. The transmittance of the prepared heat-shielding film at 950 nm was 9.2%, the visible light transmittance at 550 nm was 71%, and the haze was 0.5%.

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