Engineering multi-relaxation interfaces in Ti₃C₂T _x for reducing wideband radar cross section

Abstract

The development of multifunctional electromagnetic wave (EMW) absorbing materials become the inevitable course for the rapid progress of military weapons and 5G smart communication technology. The construction of engineered multi-relaxation interfaces provides an effective means for materials to enhance EMW attenuation. Herein, MXene derived Ti3C2Tx/TiO2 heterogeneous interface is tailored through the in-situ anneal, where the multi-relaxation nano-interfaces are achieved. When the annealed temperature reaches 450 °C, the maximum reflection loss (RL) of Ti3C2Tx/TiO2 is -30.4 dB at 5.67 GHz due to the enhanced interfacial polarization and optimized impedance matching. More importantly, an effective reduction in the radar cross section up to -53 dBm2 was achieved by using the Ti3C2Tx/TiO2 as the octagonal patch through effective shape design. Therefore, we believe that Ti3C2Tx/TiO2 with optimized shape has a broad application prospect in the field of radar stealth and practical electromagnetic protection.

Robust MXene Nanosheet-Based Electromagnetic Interference Shielding Membrane with Cation–π Interactions

“…MXene nanosheets represent a class of two-dimensional materials comprising transition metal carbides/nitrides. − With its distinctive chemical structure and remarkable electrical conductivity, MXene nanosheets have garnered widespread attention in the field of materials science. − Since its initial discovery in 2011, the incorporation of MXene nanosheets as a conductive component for constructing EMI shielding materials has captivated the interest of researchers in the field of EMI shielding. , Jiang et al employed an impregnation and densification process to composite MXene nanosheets with delignified wood, resulting in a flexible conductive material, which demonstrated an impressive electrical conductivity of 1858 S·m –1 and achieved a total EMI shielding effectiveness (SE T ) of 32.7 dB. Hu et al utilized vacuum filtration and dip-coating techniques to fabricate a composite membrane of MXene nanosheets and aromatic polyamide nanofibers.…”

Design and Manufacturing of a Hexapattern Frequency Selective Surface Absorber for Aerospace Stealth Application

“…In another approach, by using magnetic and dielectric composite coatings with tunable electromagnetic parameters, radar-absorbing materials were demonstrated. In these reports, the absorption of radiation from the microwave-to-optical wavelength region was discussed including loss mechanisms. − …”

Corncob-Derived Two-Dimensional N-Doped Carbon Sheets as the Ultrabroadband Microwave-Absorbing Material

“…The composition modulation generally involves the introduction of magnetic metal powders into carbon materials aimed at improving the magnetic loss capability. , However, due to the poor stability of magnetic metal powders under extreme conditions, their practical applications may be limited. The introduction of more stable heteroatoms, such as nitrogen, in carbon materials may help improve the dielectric properties and thus enhance the polarization loss, eventually solving the aforementioned problem. , In terms of structural regulation, two-dimensional materials and their heterodimensional structures have been proven to have wide application prospects in electromagnetic protection. , However, existing structural regulation for biomass-derived carbon mainly focuses on one-dimensional tubular/fibrous structures and three-dimensional porous structures. − In addition, there is extensive research on activation through activators such as CO 2 and KOH to increase the specific surface area and enrich the pore structure. Up to now, very few studies have investigated graphene-like, two-dimensional biomass-derived carbon as microwave-absorbing materials.…”