Dang Saichao, Yang Wei, Zhang Jialei, Zhan Qiwen, Ye Hong
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, People's Republic of China.
Sustainable Photonics Energy Research Laboratory, Material Science Engineering, PSE, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.
Nanophotonics. 2024 Jul 11;13(20):3835-3846. doi: 10.1515/nanoph-2024-0193. eCollection 2024 Aug.
Sophisticated infrared detection technology, operating through atmospheric transmission windows (usually between 3 and 5 μm and 8-13 μm), can detect an object by capturing its emitted thermal radiation, posing a threat to the survival of targeted objects. As per Wien's displacement law, the shift of peak wavelength towards shorter wavelengths as blackbody temperature rises, underscores the significance of the 3-5 μm range for ultra-high temperature objects (e.g., at 400 °C), emphasizing the crucial need to control this radiation for the objects' viability. Additionally, effective heat management is essential for ensuring the consistent operation of these ultrahot entities. In this study, based on a database with high-temperature resist materials, we introduced a material-informatics-based framework aimed at achieving the inverse design of simultaneous thermal camouflage (low emittance in the 3-5 μm range) and radiative cooling (high emittance in the non-atmospheric window 5-8 μm range) tailored for ultrahigh-temperature objects. Utilizing the transfer matrix method to calculate spectral properties and employing the particle swarm optimization algorithm, two optimized multilayer structures with desired spectral characteristics are obtained. The resulted structures demonstrate effective infrared camouflage at temperatures up to 250 °C and 500 °C, achieving reductions of 86.7 % and 63.7 % in the infrared signal, respectively. At equivalent heating power densities applied to the structure and aluminum, structure 1 demonstrates a temperature reduction of 29.4 °C at 0.75 W/cm, while structure 2 attains a temperature reduction of 57.5 °C at 1.50 W/cm compared to aluminum, showcasing enhanced radiative cooling effects. This approach paves the way for attenuating infrared signals from ultrahigh-temperature objects and effectively managing their thermal conditions.
先进的红外探测技术通过大气传输窗口（通常在3至5微米和8至13微米之间）运行，能够通过捕获物体发出的热辐射来探测物体，这对目标物体的生存构成威胁。根据维恩位移定律，随着黑体温度升高，峰值波长向更短波长移动，这突出了3至5微米波段对于超高温物体（例如400°C）的重要性，强调了为确保这些物体的生存能力而控制这种辐射的迫切需求。此外，有效的热管理对于确保这些超高温物体的持续运行至关重要。在本研究中，基于高温抗性材料数据库，我们引入了一种基于材料信息学的框架，旨在实现针对超高温物体的同时热伪装（在3至5微米波段低发射率）和辐射冷却（在非大气窗口5至8微米波段高发射率）的逆向设计。利用转移矩阵法计算光谱特性并采用粒子群优化算法，获得了具有所需光谱特性的两种优化多层结构。所得结构在高达250°C和500°C的温度下展示了有效的红外伪装，红外信号分别降低了86.7%和63.7%。在施加于结构和铝的等效加热功率密度下，结构1在0.75W/cm时比铝的温度降低了29.4°C，而结构2在1.50W/cm时比铝的温度降低了57.5°C，展示了增强的辐射冷却效果。这种方法为减弱超高温物体的红外信号并有效管理其热状态铺平了道路。
