热发射率
红外线的
发射率
材料科学
红外窗口
热辐射
辐射冷却
光学
辐射强度
黑体辐射
热光电伏打
光电子学
远红外
辐射
辐射传输
低发射率
红外线加热器
吸收率
超材料
热红外光谱
物理
天体物理学
梁(结构)
热力学
共发射极
反射率
作者
Qiao Xu,Xianglei Liu,Yimin Xuan,Ying Xu,Dachuan Liu
标识
DOI:10.1016/j.ijheatmasstransfer.2020.120318
摘要
Infrared thermal radiation suppression techniques are vital to the survival of various vehicles/targets, and low-emissivity materials are conventionally employed to reduce infrared radiant power of targets. However, infrared radiant power depends not only on infrared emittance but also heavily on the temperature according to Steven-Boltzmann law (P=εσT4). In this work, it is for the first time, a novel type of infrared stealth material based on tailoring radiative properties in an ultra-broadband ranging from 0.4 µm to 14 µm is proposed. A low emittance in atmosphere window (3–5 µm, 8–14 µm) is achieved to suppress infrared radiation, and a high emittance from 5 to 8 µm is obtained to reduce temperature via radiative cooling from metamaterial surface to the atmosphere. Meanwhile, low absorptance in the solar spectra (0.4–2.5 µm) can help to resist the solar heat. As a result, the infrared radiant power in the atmospheric window is prominently reduced benefiting from low emittance and decreased temperature. This work helps guide the design of more effective infrared stealth materials and paves the way for the applications of metamaterials in infrared stealth applications.
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