文献类型：期刊文献

英文题名：Morphology-Controlled Fabrication Strategy of Hollow Mesoporous Carbon Spheres@f-Fe2O3 for Microwave Absorption and Infrared Stealth

作者：Ma, Wenjun[1];Tang, Chuanhao[1];He, Peng[1];Wu, Xiaohan[1];Cui, Zhong-Kai[2];Lin, Shaoliang[1];Liu, Xiaoyun[1];Zhuang, Qixin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Adv Polymer Mat Shanghai, Shanghai 200237, Peoples R China;[2]Southern Med Univ, Sch Basic Med Sci, Guangzhou 510515, Peoples R China

年份：2022

卷号：14

期号：30

起止页码：34985

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20223412594092);WOS:【SCI-EXPANDED(收录号:WOS:000834173900001)】；

基金：? ACKNOWLEDGMENTS This work was supported by the National Natural Science Foundation of China (52073091, 22171086) and the Natural Science Foundation of Shanghai (20ZR1414600) .

语种：英文

外文关键词：hollow mesoporous carbon; ?-Fe2O3; synergistic loss; microwave absorption; infrared stealth

摘要：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 hydro thermal process, the confined growth of flake alpha-Fe2O3 (f-Fe2O3) outside of hollow mesoporous carbon spheres (HMCS) is achieved using NH3 center dot 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-Fe(2)O(3 )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 mu m 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.