In this study, Si 2 N 2 O particles intended for use as radiative cooling materials were synthesized by heat-treatment of mixtures of Si and SiO 2 powders in an N 2 atmosphere at 1450°C. The resulting Si 2 N 2 O particles were used as Si 2 N 2 O coatings on Al substrates as a radiative cooling device, and these coatings were generated using pulsed electrophoretic deposition. The average difference in temperature from the ambient temperature of the SSRM devices with the film thicknesses of 6.5, 13.2 and 35.2¯m were ¹0.82, ¹0.44 and +0.83°C, respectively. A radiative cooling effect was observed for the device with the film thicknesses of 6.5 and 13.2¯m.

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