增强高频段电磁波吸收的Ti3C2Tx-CoFe2O4@TiO2复合材料

doi:10.15541/jim20260347

摘要/Abstract

摘要： 随着高频电磁波在通信领域的应用日益广泛,适用于高频段的吸波材料受到了广泛关注。然而,吸波材料的电磁参数会随频率升高而迅速下降。因此,如何实现吸波材料在高频段的高吸收性能,一直是一项挑战。本研究采用一种简便的室温原位合成方法,制备出具有插层和核壳结构的新型Ti₃C₂T_x-CoFe₂O₄@TiO₂复合材料。通过将CoFe₂O₄颗粒插入Ti₃C₂T_x层间,并在其表面负载TiO₂,从而构建出三维网络结构。由于引入了磁性CoFe₂O₄和低介电常数的TiO₂颗粒,高介电常数的Ti₃C₂T_x的电磁参数也得到了优化,显示出对高频电磁波良好的匹配性能。此外,室温工艺有效保留了Ti₃C₂T_x表面丰富的官能团,可极大提升极化弛豫损耗。最终,Ti₃C₂T_x-CoFe₂O₄@TiO₂复合材料表现出优异的电磁波吸收性能,以20%(质量分数)的负载量,在18.00 GHz处实现了高达−52.99 dB的吸收效果和3.86 GHz的有效吸收宽度。本研究提出了一种室温下简便有效的材料设计与制备策略,通过电磁组分的合理搭配以及低介电材料的包覆,可以有效提升材料在高频段的吸波性能,该工作一定程度上推动了高频电磁波吸收材料的研究与应用。

关键词: 吸波材料, 核壳结构, Ti₃C₂T_x, CoFe₂O₄, 高频

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

中图分类号:

TB34

余越, 张静斐, 马雪梅, 贝汉章, 吴炼, 庞浩. 增强高频段电磁波吸收的Ti₃C₂T_x-CoFe₂O₄@TiO₂复合材料[J]. 无机材料学报, DOI: 10.15541/jim20260347.

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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增强高频段电磁波吸收的Ti₃C₂T_x-CoFe₂O₄@TiO₂复合材料

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

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