Experts said that ball milling is beneficial to disperse the Cs0.32WO3 particles, so that the infrared thermal insulation nano material prepared by such particles has better near-infrared shielding performance. The expert used 1mm zirconia grinding ball. And the ball was milled for 3h under the condition that the mass ratio of the ball to the dispersion was 5-6. And finally the cesium tungsten bronze particles with uniform size and the dispersed stable Cs0.32WO3 dispersion were obtained.
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They found that the average particle size of the ball-milled Cs0.32WO3 particles was reduced with water as a solvent, and the dispersion stability was also greatly improved. The dispersion effect of polyvinyl alcohol and titanate coupling agent on Cs0.32WO3 dispersion is better than that of polycarboxylate dispersant. Adding dispersant after ball milling can effectively increase the dispersion stability of dispersion and make Cs0.32WO3 particles evenly and continuously distributed on the surface of the coating, which improves the near-infrared shielding performance of the transparent heat-insulating coating and blocks the heat in the near-infrared spectrum.
