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- W4286742018 abstract "The design and development of radar-–infrared compatible stealth materials are challenging in the field of broadband absorption due to the contradiction of stealth requirements and mechanisms in different frequency bands. However, hollow structures show great promise for multispectral stealth because they can lengthen the attenuation path of electromagnetic waves (EMWs) for microwave absorption, interrupt the continuity of heat-transport channels, and lower the thermal conductivity to realize infrared stealth. Here, a new morphological fabrication strategy has been developed to efficiently prepare compatible stealth nanomaterials. In a specific hydrothermal process, the confined growth of flake α-Fe2O3 (f-Fe2O3) outside of hollow mesoporous carbon spheres (HMCS) is achieved using NH3·H2O as a shape-controlled reagent. The introduction of f-Fe2O3 helps to lower infrared emissivity and improve high-frequency impedance matching, which depends on the stable dielectric property of the specific flake shape. Moreover, the size of f-Fe2O3 can be regulated by changing the constituent proportion in the hydrothermal suspension to obtain excellent performance. The minimum reflection loss (RL) of the HMCS@f-Fe2O3-6 composite is −34.16 dB at 2.4 mm, and the effective absorption bandwidth (EAB) reaches 4.8 GHz. Furthermore, the lowest emissivities of the HMCS@f-Fe2O3-6-20 wt %/polyetherimide (PEI) film in the 3–5 and 8–14 μm infrared wavebands are 0.212 and 0.508, respectively. These discoveries may pave the way for the development of radar–infrared compatible stealth materials from the perspective of microstructural design." @default.
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- W4286742018 date "2022-07-23" @default.
- W4286742018 modified "2023-10-17" @default.
- W4286742018 title "Morphology-Controlled Fabrication Strategy of Hollow Mesoporous Carbon Spheres@f-Fe<sub>2</sub>O<sub>3</sub> for Microwave Absorption and Infrared Stealth" @default.
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- W4286742018 doi "https://doi.org/10.1021/acsami.2c08077" @default.
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