PDF
Full
Outline
Infrared stealth technology aims to avoid detection by suppressing a material's emissivity within the detection waveband. However, conventional optical films and metasurface technologies struggle to meet the demands for low−cost, large−area infrared stealth applications. This paper proposes a low−cost infrared stealth composite coating based on polyetherimide (PEI) and metal. Through theoretical calculations using the Transfer Matrix Method (TMM) and simulation via the Finite−Difference Time−Domain (FDTD) method, combined with process optimization. The optimal structural parameters were determined to be a 4.5 μm PEI layer on a chromium (Cr) metal layer. Experimentally fabricated samples demonstrated low average emissivity values in key infrared atmospheric transmission windows. Specifically, the average emissivities were measured at 0.26 in the 3−5 μm band, 0.61 in the 5−8 μm band, and 0.47 in the 8−14 μm band. This performance allows the coating to achieve infrared stealth within the typical detection bands. Simultaneously, it enables effective radiative heat dissipation in non−detection bands. The research elucidated the underlying infrared response mechanism of the composite coating. It was revealed that the wavelength−selective radiative properties are primarily governed by the synergistic interaction between the chemical bond vibrational absorption inherent to the PEI material and the Fabry−Perot (FP) resonance modes established within the layered structure. Furthermore, PEI contributes high mechanical performance to the coating. Its compatibility with low−cost manufacturing processes enhances its practicality. Consequently, this makes the coating highly suitable for diverse application scenarios. Notably, the experimental results showed excellent agreement with the simulation and calculation data, which effectively validates the design methodology employed in this study. Overall, this work provides a novel and promising approach for developing cost−effective infrared stealth materials. It holds significant potential application value in critical fields such as military stealth and thermal management.
PDF
487
248
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
关闭全屏
No. 86 Xueyuan South Road, Haidian District, Beijing
010-62199257
qkjq@cast.org.cn
Copyright © 2025 China Association for Science and Technology. All rights reserved. For all open access content, the relevant licensing terms apply.
Sponsored by the Office of the Leading Group for Cybersecurity and Informatization of CAST, and supported by Science and Technology Review Publishing House
