Small Structures
·
2025
·
IF 11.3
Ibrahim Abdalla,Ahmed Elhassan,Salma Ali,Malik Yonis Hassan Saty,Ekrema Adam,Lihua Zou,Qingqing Ni,Zhenzhen Xu
Carbon nanofibers (CNFs) exhibit inherent dielectric properties that enhance electromagnetic (EM) wave absorption, yet challenges exist in expanding their effective absorption bandwidth (EAB) and improving flexibility. Many studies fail to adequately consider how structural factors influence performance when combining CNFs with magnetic materials. To address these issues, a 1D carbon nanocomposite is developed by embedding magnetic oxide nanoparticles within CNFs using a simple electrospinning technique. This approach improves membrane flexibility by disrupting rigid alignment and introducing dynamic magnetic interactions, while also creating defect-rich interfaces that increase the amorphous content (61%) of the CNFsF composite, leading to improved EM wave absorption. The unique macro/mesoporous morphology provides internal interfaces and heterogeneous boundaries that effectively trap and dissipate EM waves. As a result, the flexible CNF composites demonstrate significant EM wave absorption performance, achieving a minimum reflection loss (RL min ) of −39.8 dB at 4.64 GHz and an abroad EAB of up to 7 GHz at only 2.5 mm thickness. Computer simulation technology (CST) simulations indicate a maximum radar cross-section reduction of 21.1 dB m 2 , highlighting the material's radar stealth capability. This research advances the development of high-performance materials and offers new strategies for enhancing absorption properties through composite engineering.
研究领域:
材料科学
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电磁学
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复合材料工程
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产品关联
DOI
高影响因子
Nano-Micro Letters
·
2023
·Vol. 16
·期 1
·1-17
·
IF 26.6
Li Xin,Hu Ruizhe,Xiong Zhiqiang,Wang Dan,Zhang Zhixia,Liu Chongbo,Zeng Xiaojun,Chen Dezhi,Che Renchao,Nie Xuliang
Fe 3+ , Co 2+ , H 3 BTC, and collagen peptide are used to achieve a one-step assembly of stable FeCo-MOG/CP by manipulating the complexation effect and solution polarity.
By optimizing pyrolysis, two kinds of nitrogen-doped carbon aerogels loaded with virus-shaped and nanospherical magnetic particles are obtained.
FeCo/Fe 3 O 4 /NC and FeCo/NC aerogels exhibit excellent electromagnetic wave absorbing and radar stealth performances.
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 41
·14371-14381
·
IF 6.4
Weijie Liang,Ying Wang,Feng Gao,Shikun Hou,Qiong Wu,Hua Yang,Fei Jin,Gongxun Bai,Yahui Wang,Zhenbao Li,Hongliang Ge
Materials for electromagnetic wave (EMW) absorption are rapidly advancing to meet the growing demand for stealth technology and to mitigate electromagnetic pollution. Herein, we innovatively synthesize a superlight Ni–Co Prussian blue analogue microcube/graphene aerogel (Ni–Co PBA/GA) monolith by hydrothermal reaction and freeze-drying. Compared to individual graphene aerogels, Ni–Co PBA/GA displays better impedance matching and multiple mechanisms for attenuating EMWs. Resultantly, Ni–Co PBA/GA presents outstanding EMW absorption performance, whose minimum refection loss is −62.3 dB at 13.3 GHz and the effective absorption bandwidth reaches 5.6 GHz. With the detection Phi of 0°, the simulated radar cross-section reduction of Ni–Co PBA/GA reaches −36.8 dB m2, demonstrating the potential radar-evading ability in the actual far field. Ni–Co PBA/GA may be a promising candidate for a superlight, ecofriendly and high-performance EMW absorption material in the future.
研究领域:
材料科学
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电磁学
·
环境科学
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Chuyang Liu,Taian He,Congcong Hu,Qi Qian,Yilin Hao,Lu Xu,Hengyi Lu,Guangbin Ji
In contemporary times, radar and infrared-compatible stealth materials have emerged as a pivotal domain of research globally, aimed at augmenting the survivability of military assets. However, current candidates generally exhibit subpar compatibility performance in elevated temperature environments due to the imbalanced interplay between the two spectral bands. In this work, a meticulously designed sandwich-structure SiO 2 /C@SiC/SiO 2 composite is proposed to cope with the challenge. The middle layer of C@SiC composites possesses excellent microwave absorption performance even at high temperatures. The outer layers of SiO 2 aerogels serve not only to inhibit the infrared radiation intensity, but also reinforce the microwave absorption capacity by optimizing the impedance matching and reducing the heat transferred to the middle layer. Based on the numerical simulation outcomes, the thickness of each layer has been optimized to attain a harmonious balance between microwave absorption and infrared radiation properties. Ultimately, the sandwich structured SiO 2 /C@SiC/SiO 2 composites demonstrate low RL (reflection loss) values (←5 dB) across nearly the entire X band (8–12 GHz), alongside minimal surface temperatures hovering ≈44 °C at an ambient temperature of 200 °C. The comprehensive investigation into impact patterns and underlying mechanisms offers invaluable insights to develop radar and infrared-compatible stealth materials for high-temperature applications, which can be applied as stealth coatings on the skin of high Mach number aircraft.
研究领域:
材料科学
·
隐身技术
·
数值模拟
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产品关联
DOI
高影响因子
Materials Today Physics
·
2025
·
IF 9.7
Guodong Han,Fangyuan Qi,Song Zhao,Yuxiang Jia,Yudeng Wang,Sai Sui,Bo Feng,Jun Wang,Jiafu Wang,Shaobo Qu
The lightweight microwave absorbing materials(MAMs) have always been a research hot topics in the field of electromagnetic waves(EMWs) absorption. In this work, the pineapple peel (PA) was used as a carbon source and combined with Co alloys. The hollow porous carbon of the PA after pyrolysis provides advantage for becoming the lightweight MAMs. When the soaking time of PA-800 in the solution of CoCl 2 •6H 2 O achieves at 60 h, PA-800-60 was successfully prepared which the RL min of −24.8 dB and the EAB reach 5.8 GHz (12.2–18 GHz) at the thickness of only 1.3 mm. In order to improve the effects of impedance matching, the height of 9 mm frustum metastructure based on PA-800-60 was designed and used for improving microwave absorption in the low-frequency range. The EAB has been expanded from 5.8 GHz to 13.5 GHz (3.5–18 GHz) which covers the C, X and Ku band and the RL min reached −17.5 dB at the frequency of 7.44 GHz. Meanwhile, the RCS value of PA-800-60 layer is less than −10 dB m 2 cover the range of −60°–60° and the maximum scattering intensity is only −10 dB m 2 at the thickness of 2 mm. In addition to, the PA-800-60 exhibits superb thermal insulation performance due to abundant air with lower thermal conductivity take place of solid phase with higher thermal conductivity. This work provides a new direction for the research and development of multifunctional electromagnetic metastructures based on the lightweight MAMs.
研究领域:
电磁学
·
材料科学
·
热力学
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产品关联
DOI
高影响因子
CARBON
·
2022
·
IF 11.307
Yishu Cao,Zheng Cheng,Ruofeng Wang,Xiaoyan Liu,Tianrui Zhang,Fei Fan,Yi Huang
Lightweight absorption-dominated electromagnetic interference (EMI) shielding materials with multifunctional integration of multiband absorption, mechanical durability and thermal insulation are urgently required in the practical application of next-generation communication technology combined with flexible electronics. In this work, ultralight and mechanically durable graphene/carbon fiber composite aerogels (CGAs) are synthesized via solvothermal reaction and freeze-drying. The as-prepared CGAs demonstrate excellent compatible electromagnetic wave absorption and shielding performance in both gigahertz (GHz) and terahertz (THz) bands without addition of magnetic component. Specifically, a broad efficient absorption bandwidth of 8.72 GHz at 2–18 GHz and a high mean absorptivity of 97.4% at 0.3–1.5 THz are achieved, respectively. Furthermore, absorbing coatings with CGAs have been proved to contribute to remarkable radar cross section reduction of 39.06 dBm 2 by computer-assisted simulation. Additionally, the compressible CGA demonstrates superior and stable EMI shielding performance under in-situ compression. The EMI shielding effectiveness exceeds 35 dB in X-band when a compression ratio of 78.9% is applied. Moreover, CGAs are thermally insulating and self-extinct, making them reliable in practical application. This work provides a series of promising multifunctional lightweight EMI shielding materials for future high-frequency wireless communication .
研究领域:
材料科学
·
电子工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Sen Lin,Jing Lin,Zhiqiang Xiong,Xue He,Xin Li,Chongbo Liu,Chengying Wang,Xiaojun Zeng,Xuliang Nie,Renchao Che
Magnetic carbon aerogels with high porosity, ultralow density, and excellent impedance matching are considered to be a promising microwave absorption (MA) material. In this study, ethylene glycol polymerization is used to assemble Ni 3 Fe particles into a micro-helical chain, which is further wrapped by MXene and then encapsulated in poly-Schiff-base aerogels through the carbonyl–amine condensation reaction. Finally, ultralight TiO 2 /Ni 3 Fe/MXene/C (NFMC) aerogels are synthesized through calcination treatment. Benefiting from the electromagnetic synergistic effect of multi-dimensional and multi-component materials, the NFMC-7 aerogel exhibits excellent MA performance with a minimum reflection loss of −61.6 dB at 3.0-mm thickness and an effective absorption bandwidth of 8.16 GHz at 2.77-mm thickness under a low filler loading of 7.6 wt%. Commercial computer simulation technology is used to verify the strong magnetic and dielectric loss characteristics of Ni 3 Fe chains. At the same time, the NFMC-7 aerogel exhibits excellent radar stealth, heat insulation, compression resistance, and fire resistance performance, which verifies its practical applicability. Overall, this work establishes an effective strategy to fabricate multi-functional magnetic aerogels, which can serve as lightweight, thin, and strong microwave absorbers with broad absorption bandwidth.
研究领域:
材料科学
·
电磁学
·
多功能材料
✓ 已验证
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Xiang Dong,Xiaoyu Jiang,Zhiyu Sun,Yan Ma,Yan Li,Zixin Lin,Shibin Nie,Konghu Tian
For the application of intelligent equipment in fire rescue and anti-terrorism, the urgent need of shell materials with comprehensive performance, including radar wave absorption and fire safety, is raised. This study presents the epoxy resin (EP) composite incorporating a floral-structured bimetallic Co/Ni@CuBTC (ACM) with enhanced EMW absorption, flame retardancy and thermal management. The results show that the absorption rate of ACM at 3 mm thickness reaches -42.25 dB for 11.5 GHz EMW, and the dissipation to radar waves at -180 o to 180 o in radar cross section (RCS) simulation reaches -40.2 dB. The EP composite with 5 wt% ACM can block cell phone (800 MHz) and Bluetooth signals (2.4 GHz) at 3 mm thickness. The EP composite with 3 wt% ACM-3 (EP/ACM 3 %) presented the lowest peak heat release rate of 811.2 kW·m -2 , which decreased by 39.5 % compared with pure EP, meanwhile it reached the V-1 rate in UL-94 test, showing a significant improvement in flame retardancy. The thermal conductivity (λ) of EP/ACM 3 % reached 0.811 Wm -1 K -1 , which is 21.9 % higher than that of pure EP, reducing the risk of heat accumulation. The EP/ACM composite, with its integrated capabilities in EMW absorption, flame retardant and thermal management, holds promising applications in unmanned fire rescue and anti-terrorism in future.
研究领域:
材料科学
·
电磁工程
·
消防安全工程
·
聚合物复合材料
·
热管理
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）