As a passive, efficient, and renewable powerless cooling method, radiation cooling has received widespread attention in the field of energy conservation. Radiators with high reflectivity in the solar radiation band can achieve daytime radiation cooling, which can better meet people’s needs. In this work, zeolites were used as a functional material for radiative cooling due to its high solar reflectivity, high mid-infrared emissivity, and low heat conductivity. The influence of zeolite spectral properties and thermal insulation performance on their cooling effect were systematically studied. The cooling test showed that the ZSM-5-470 zeolite-based coating achieved a coating temperature (T) decrease of ~ 21 °C compared to a pure aluminum plate and a decrease of ~ 4 °C compared to a TiO2 coating under direct sunlight. However, the inside temperature (T_in) of ZSM-5-470 coating reached at most ~ 3.2 °C lower than TiO₂ coating. This may suggest that the spectral properties of zeolites have more obvious effect on the daytime radiative cooling than their thermal conductivities. Zeolites are convenient to manufacture for mass production, which makes them the potential daytime cooling materials to achieve economic and environmental friendly cooling.

辐射冷却作为一种被动、高效、可再生的无动力冷却方式，在节能领域受到广泛关注。在太阳辐射波段具有高反射率的散热器可以实现白天的辐射降温，更能满足人们的需求。在这项工作中，沸石因其高太阳反射率、高中红外发射率和低热导率而被用作辐射冷却的功能材料。系统研究了沸石光谱特性和隔热性能对其冷却效果的影响。冷却测试表明，在阳光直射下，ZSM-5-470 沸石基涂层的涂层温度 (T) 与纯铝板相比降低了约 21 °C，与 TiO2 涂层相比降低了约 4 °C . 然而，ZSM-5-470 涂层的_in ) 比 TiO ₂涂层低至多约 3.2 °C 。这可能表明沸石的光谱特性对白天辐射冷却的影响比其热导率更明显。沸石易于制造以进行大规模生产，这使其成为潜在的日间冷却材料，以实现经济和环境友好的冷却。