Enhanced Absorption of High-frequency Electromagnetic Waves by Ti3C2Tx-CoFe2O4@TiO2 Composite

doi:10.15541/jim20260347

Abstract

Abstract: With the increasing utilization of high-frequency electromagnetic waves in the field of communication, electromagnetic wave absorbing materials suitable for elevated frequencies have garnered significant attention. However, the electromagnetic parameters of the absorbing materials rapidly decrease as the frequency increases. Therefore, how to achieve high absorption of the absorbing materials in the high-frequency range has always been a challenge in research. In this work, a novel Ti₃C₂T_x-CoFe₂O₄@TiO₂ composite material featuring intercalated and core-shell structures was fabricated through a straightforward room-temperature in-situ synthesis method. A three-dimensional network was constructed via the intercalation of CoFe₂O₄ particles into the interlayers of Ti₃C₂T_x and the loading of TiO₂ particles on the surface. The electromagnetic parameters of the high-permittivity Ti₃C₂T_x were also optimized due to the introduction of these magnetic CoFe₂O₄ and low-permittivity TiO₂ particles, demonstrating good matching performance for high-frequency electromagnetic waves. Additionally, the abundant functional groups were preserved on the surface of Ti₃C₂T_x through the room-temperature process, which can greatly enhance polarization relaxation loss. Therefore, the optimized Ti₃C₂T_x-CoFe₂O₄@TiO₂ composit demonstrated exceptional electromagnetic wave absorption performance, achieving a remarkable absorption performance with a minimum reflection loss (RL_min) of −52.99 dB at 18.00 GHz, and a wide effective absorption bandwidth (EAB) of 3.86 GHzat a filler loading of 20% (in mass). This study proposes a facile and effective material design and fabrication strategy at room temperature. Through the rational combination of electromagnetic components and the coating of low-dielectric materials, the wave-absorbing performance of the material in the high-frequency band can be effectively improved. To a certain extent, this work has promoted the research and application of high-frequency electromagnetic wave-absorbing materials.

Key words: electromagnetic wave absorbing, core-shell structure, Ti₃C₂T_x, CoFe₂O₄, high frequency

CLC Number:

TB34

YU Yue, ZHANG Jingfei, MA Xuemei, BEI Hanzhang, WU Lian, PANG Hao. Enhanced Absorption of High-frequency Electromagnetic Waves by Ti₃C₂T_x-CoFe₂O₄@TiO₂ Composite[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20260347.

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Enhanced Absorption of High-frequency Electromagnetic Waves by Ti₃C₂T_x-CoFe₂O₄@TiO₂ Composite

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