Cesium tungstate is mainly applied for manufacturing thermal insulating glass coating as a near-infrared (NIR) shielding material. Wherein, the cesium tungstate nano powder should be prepared into dispersion first. And in order to achieve good dispersion of Cs0.33WO3 particles and improve their NIR shielding efficiency, the influences of ball-milling and dispersant on the dispersion stability of Cs0.33WO3 particles and its near-infrared shielding properties were investigated.
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The microstructure, morphology, particle size distribution and Zeta potential of the particle samples were characterized by XRD, SEM and laser particle size analyzer. The results indicate that adding appropriate dispersant after ball milling is conducive to dispersion of Cs0.33WO3 powder. Polyvinyl alcohol and titanate coupling agent have better effects on the dispersion of Cs0.33WO3 colloidal solution than poly-carboxylic salt dispersant. Particularly, the as-prepared Cs0.33WO3 coating prepared from colloidal dispersion solution using titanate coupling agent at pH?=?7 showed best visible light transmittance and near-infrared shielding properties, and have great potential applications as thermal insulation coatings for building and automotive glasses.
