Cesium Tungsten Bronze Nano Dispersion Applied for Heat Insulation Coating

Cesium tungsten bronze nano dispersion has high transparency and good near-infrared shielding function, so it is often used in the preparation of heat insulation coating. And it has found that when the near-infrared shielding ratio of the cesium tungsten bronze organic phase dispersion at 1000 nm is 90%, the visible light transmission at 520 nm can reach 73%. The experts used nano cesium tungsten bronze in the aqueous phase dispersion synthesized by hydrothermal method as the raw material, coated and modified the particle surface, and dispersed in dimethyl sulfoxide to obtain cesium tungsten bronze nano dispersion with these properties.

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The experts also studied the effects of modification conditions such as the type of modifier, the type of modification medium, the modification temperature, and the modification time on the dispersion performance of cesium tungsten bronze particles in dimethylsulfoxide, and determined the modification process conditions: The modification medium is a mixture of methanol and water. The volume ratio of water to the mixed solution ranges from 1 to 6%. The concentration range of cesium tungsten bronze particles is 3-6 mg/mL. The modifier is 40 wt%, modification temperature is 60 °C, and modification time is 2 h. The particles have good dispersion stability in dimethyl sulfoxide, and the dispersion is left for 6 months without sedimentation.

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