Cesium tungstate, which has the best infrared shielding feature, is mainly applied for manufacturing heat shielding material. And these heat insulation products are widely applied in buildings and automobiles. Wherein, the cesium tungstate used is cesium tungstate nanopowder, which can be synthesized by a high-temperature carbothermal reduction method. And the prepared Cs0.33WO3 particles are smaller with better crystallinity. Among them, the optimum synthesis conditions are 700 °C and 5 hours.
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According to the experts, by wet ball milling, the average particle size of Cs0.33WO3 can be reduced to 100 nm in 1 hour with 50 μm zirconia beads. With the electrostatic repulsion mechanism, a suspension solution of Cs0.33WO3 nanoparticles can be prepared. And then the suspension solution of Cs0.33WO3 can be made into films with different thicknesses. What should be noted is that the speed of wet ball milling should not be too fast, and the time should not be too long, to avoid the oxidation of tungsten and the degradation of its near-infrared absorption characteristics.
