High-temperature infrared camouflage with efficient thermal management.,Light: Science & Applications

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High-temperature infrared camouflage with efficient thermal management.
Light: Science & Applications ( IF 20.6 ) Pub Date : 2020-04-14 , DOI: 10.1038/s41377-020-0300-5
Huanzheng Zhu ₁ , Qiang Li ₁ , Chunqi Zheng ₁ , Yu Hong ₁ , Ziquan Xu ₁ , Han Wang ₁ , Weidong Shen ₁ , Sandeep Kaur ₁ , Pintu Ghosh ₁ , Min Qiu _{2,

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Affiliation

High-temperature infrared (IR) camouflage is crucial to the effective concealment of high-temperature objects but remains a challenging issue, as the thermal radiation of an object is proportional to the fourth power of temperature (T 4). Here, we experimentally demonstrate high-temperature IR camouflage with efficient thermal management. By combining a silica aerogel for thermal insulation and a Ge/ZnS multilayer wavelength-selective emitter for simultaneous radiative cooling (high emittance in the 5-8 μm non-atmospheric window) and IR camouflage (low emittance in the 8-14 μm atmospheric window), the surface temperature of an object is reduced from 873 to 410 K. The IR camouflage is demonstrated by indoor/outdoor (with/without earthshine) radiation temperatures of 310/248 K for an object at 873/623 K and a 78% reduction in with-earthshine lock-on range. This scheme may introduce opportunities for high-temperature thermal management and infrared signal processing.

中文翻译：

具有高效热管理功能的高温红外伪装。

高温红外（IR）伪装对于有效隐藏高温物体至关重要，但仍然具有挑战性，因为物体的热辐射与温度的四次方（T 4）成正比。在这里，我们通过实验证明了具有有效热管理功能的高温IR伪装。通过将用于隔热的二氧化硅气凝胶与用于同时辐射冷却（在5-8μm的非大气窗口中的高发射率）和IR伪装（在8-14μm的大气窗口中的低发射率）同时辐射的Ge / ZnS多层波长选择发射器组合在一起），物体的表面温度从873 K降低到410K。红外伪装通过对象在873/623 K处的室内/室外（有/没有地光）辐射温度为310/248 K和有地电锁定范围降低78％来证明。此方案可能会引入高温热管理和红外信号处理的机会。

更新日期：2020-04-24

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