期刊
CHEMICAL ENGINEERING JOURNAL
卷 473, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2023.145409
关键词
Electromagnetic wave absorption; Ultrasmall matching thickness; CoNiO 2 /Ti 3 C 2 T x MXene nanospheres; Stealth satellite; Radar detection distance
In this study, a heterogeneous CoNiO2/Ti3C2Tx MXene hybrid absorber with superior electromagnetic wave absorption performance was successfully synthesized. The absorber demonstrated remarkable electromagnetic absorption capacity and potential applications in spacecraft electromagnetic protection and communication devices.
Nowadays, it is still a challenging task to exploit electromagnetic wave absorption (EMA) materials with superior EMA performance under an ultrasmall thickness (approximately 1 mm). In this study, heterogeneous CoNiO2/ Ti3C2Tx MXene hybrid absorbers were successfully synthesized by using a simple and convenient self-assembly process. Benefiting from the increased porosity, heterogeneous interfaces, and multiple polarization processes, the unique burr-like CoNiO2/Ti3C2Tx MXene nanospheres (CNO/MXene-S) exhibited a remarkable EMA capacity with a minimum reflection loss (RLmin) value of -60.61 dB at an ultrasmall thickness of 1.069 mm and -66.79 dB at a matching thickness of 2.565 mm, respectively. The density functional theory (DFT) calculations were utilized to analyze the EMA mechanisms. Furthermore, the satellite radar cross-section (RCS) simulations demonstrated that compared with a non-stealth satellite, a stealth satellite with the CNO/MXene-S absorber exhibited decreased surface reflection of radar waves and a shortened radar detection distance. Therefore, the asprepared CNO/MXene-S absorber with an ultrasmall matching thickness can be highly promising for the electromagnetic protection of spacecraft and electromagnetic communication devices.
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