Fabrication of Cs0.32WO3/SiO2 aerogel multilayer composite coating for thermal insulation applications

• Cs0.32WO3/SiO2 aerogel multilayer composite coating was prepared on glass substrate.
• The effect of SiO2 aerogel coating thickness on the light transmittance was studied.
• The composite coating exhibited excellent heat shielding and insulation properties.

A novel Cs0.32WO3/SiO2 aerogel multilayer composite coating has been fabricated on glass substrate using the colloidal dispersion of Cs0.32WO3 and SiO2 aerogel nanoparticles, respectively. The effects of SiO2 aerogel layer thickness on the visible and near-infrared light transmittance of Cs0.32WO3/SiO2 composite coating have been investigated. The results indicate that the composite coating can achieve maximum visible light transmission when the thickness of SiO2 aerogels layer is 138 µm. When the aerogel layer thickness exceeds 138 µm, the light transmittance has a decreasing trend and near infrared shielding rate tends to increase further. It is expected that the Cs0.32WO3/SiO2 aerogel multilayer composite coatings with appropriate aerogel layer thickness would not only have higher visible light transmittance, but also have excellent near-infrared shielding and thermal insulation performance.

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