Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Yufeng Bai,Dawei Liu,Tingting Yang,Zhongyang Duan,Tai Peng
Nowadays, electromagnetic pollution caused by electronic devices is gradually becoming a concern. Moreover, as the frequency of electromagnetic pollution from electronic devices is mainly in the range of 2–10 GHz, the design of microwave-absorbing materials for this frequency range has become a hot issue. To tackle the issue, core-shell structured hexagonal boron nitride (h-BN) @polyaniline (PAn) composites have been proposed to construct heterogeneous microwave-absorbing materials. Firstly, the h-BN is exfoliated, and hydroxyl functionalized to produce hydroxy boron nitride (OH-BN), which enhances its polarization ability by structuring defects and adding functional groups to improve its microwave absorption efficiency. Afterward, PAn was grafted on the OH-BN surface by in situ polymerization. The microwave absorption properties of OH-BN@PAn composites can be tuned by modulating the doping of PAn. As expected, the OH-BN@PAn composite exhibits superior microwave absorption properties with the minimum reflection loss (RLmin) value of −38.60 dB at 3.5 mm and an effective absorption bandwidth (EAB) of 3.4 GHz (6.24–8.64 GHz) at pH = 2. Also, the composite achieves effective microwave absorption at 3.76–18 GHz by adjusting the matching thickness. Notably, the RLmin value of OH-BN@PAn was successfully tuned from the high-frequency region (12.4 GHz, pH = 0) to the low-frequency region (7.28 GHz, pH = 2) by adjusting the doping degree. In addition, the RL value and EAB width have been increased due to the increased impedance matching and polarization capability. This work can provide a reference for constructing composite microwave-absorbing materials and regulating microwave absorption performance.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Shengjie Li,Chengqing Tang,Yaoqieyu Song,Sheng Zhang,Zhi Hong Hang,Xiaohua Zhang,Yitan Li,Zhaohui Yang
Electromagnetic interference (EMI) shielding materials with lightweight, high shielding effectiveness, excellent chemical stability, especially minimized secondary electromagnetic pollution, are urgently desired for integrated electronic systems operating in harsh working environments. Here in this study, by systematically engineering and matching the interfacial properties of carbon-based membrane materials, i.e., graphite paper, whisker carbon nanotube paper (WCNT paper), carbon nanotube film (CNT film), bucky paper (BP), and carbon cloth (CC) with three-dimensional (3D) porous carbon nanotube sponge (CNTS), we successfully constructed a series of multifunctional all-carbon EMI shielding materials, which exhibit excellent average shielding effectiveness of over 90 dB with a thickness of about 1 mm and dramatically minimized secondary electromagnetic reflection. Moreover, benefiting from the all-carbon nature and engineered interfaces, our CMC materials also exhibit excellent photothermal and Joule heating performances. These results not only provide guidance for designing advanced multifunctional all-carbon EMI shielding materials but also shed light on the hidden mechanism between interfaces and performances of composite materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Runrun Cheng,Yan Wang,Xiaochuang Di,Zhao Lu,Ping Wang,Mingliang Ma,Jinrui Ye
Nowadays, facing the inevitable electromagnetic (EM) pollution caused by many electronic products, it is urgent to develop high-performance microwave absorbing materials. In particular, the bimetallic carbon-based composites derived from MOFs exhibit excellent microwave absorption potential due to their simple preparation, low cost, adjustable morphology and magnetoelectric synergy mechanism. In this work, we successfully prepared plum-like NiCo@C composite by simple solvothermal method and carbonization treatment, which displays strong absorption (-55.4 dB) and wide effective absorption band (EAB, 7.2 GHz) when the loading is 20 wt%. The plum-like structure greatly enriches the non-uniform interface and the structural anisotropy contributes to the dissipation of electromagnetic waves . At the same time, the band hybridization and magnetic coupling of NiCo@C contribute to the coordination of EM characteristics. Overall, this work proves the feasibility of NiCo@C hierarchical composite in the field of microwave absorbing, and provides insight for the development of high-performance absorbers.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
CARBON
·
2023
·
IF 10.9
Shansu Li,Wenjing Mo,Haowen Sun,Yuan Liu,Qi Wang
The application of wireless electronic devices inevitably leads to electromagnetic pollution . Three-dimensional porous foam structures have been shown to be an effective strategy to construct high-performance microwave absorbers. Herein, the honeycomb-like hierarchical foams were fabricated via melamine-formaldehyde (MF) foam as substrate coupled with flaky carbonyl iron (CI)-MXene lamellae. Inside the synthesized composite foam, flaky CI is interlaced into MXene nanosheets to form hierarchical structures, which effectively alleviates the originally self-stacking phenomenon and provides numerous heterogeneous interfaces, resulting in the optimization of impedance matching. In addition, owing to the construction of consecutive electromagnetic networks, the CI-MXene/MF foams exhibit significant dielectric loss and magnetic loss capability. Moreover, the honeycomb-like structure offers multiple reflections/scattering for electromagnetic waves, which effectively prolongs the transmission paths, further improving the microwave attenuation ability. Hence, the synthesized composite foam exhibits superior microwave absorption performance with a minimum refection loss of −61.4 dB and a maximum effective absorption band of 7.18 GHz. The construction of unique microstructure and regulation of electromagnetic components is demonstrated to be feasible strategies for the design of efficient microwave absorbers in future.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 22
·1-13
·
IF 2.8
Ma Kangrui,Wu Jiawen,Wei Derong,Chen Jin,Rong Xuanting,Ding Ruyun,Gu Jia,Ma Xuetiao,Zheng Hui
With the development and use of the electronic and electrical equipment, solving electromagnetic pollution has become a top priority for human health. In this work, ternary co-doped (Ca 2 ⁺, Cu 2 ⁺, Sn 4 ⁺) ions were incorporated into M-type hexagonal barium ferrite (Ba 1-x Ca x Fe 11.6 Cu 0.2 Sn 0.2 O 27 ), and the effects of varying Ca 2 ⁺ doping levels on the crystal structure, surface morphology, and electromagnetic characteristics were thoroughly investigated. Structural characterizations confirms that Ca 2+ substitutes Ba 2+ sites, decreasing the grain size and lattice values while increasing the lattice strain. At x = 0.15, the Ba 1-x Ca x Fe 11.6 Cu 0.2 Sn 0.2 O 27 ferrite achieves the maximum value of saturation magnetization of 67.7 emu/g, the highest RL min value of -44.2 dB@14.3 GHz and effective absorption bandwidth of 3.04 GHz, showing potential as an effective material for absorption applications.
研究领域:
材料科学
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电磁学
·
固体物理学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Guizhen Liu,Shanshan Zhang,Yutian Cai,Yongzhi Cheng,Yingli Zhu,Pingan Chen,Hui Luo,Xiangcheng Li,Fu Chen
Flexible manipulations of morphology and composition have been considered as an art to achieve excellent microwave absorption performance for absorbers derived from metal-organic frameworks (MOFs). In this work, a strategy combining ligand-exchange induced hollow engineering and high-temperature one-step sulfuration has been proposed to fabricate the Co 9 S 8 /Co@N, S dual-doped carbon-based absorbers with tailored solid, yolk-shelled and entirely hollow polyhedral morphologies. The progressive hollow engineering not only enables composition control in the sulfuration process, but also endows the proposed absorbers with superior microwave absorption capacity due to the enhanced conductivity loss and Maxwell-Wagner polarization as well as optimized impedance matching. The yolk-shelled Co 9 S 8 /Co@N, S dual-doped carbon-based composite achieves a broad effective absorption bandwidth of 5.13 GHz at 1.88 mm with 20 wt% loading and realizes a minimum microwave loss of − 51.78 dB @ 11.63 GHz with 2.37 mm. This work reveals that the joint strategy of ligand-exchange induced hollow engineering and gas-solid reactive thermal process is an effective path to construct high-efficient lightweight multi-interfacial microwave absorbers for addressing the electromagnetic pollutions.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Lingxin Kong,Hui Luo,Sihai Lv,Yongzhi Cheng,Qifan Li,Fu Chen,Xiangcheng Li
With the increase in electromagnetic wave pollution, the development of high-performance microwave absorbers has become a critical research focus. Multi-interface dielectric loss microwave absorbers have emerged as a promising strategy to address electromagnetic pollution. In this study, multi-interface carbon-based selenide composites were synthesized via solvothermal treatment and pyrolytic selenization. The thermal treatment temperature significantly influences the crystal phase, defects, and the electromagnetic properties. The results demonstrate that the carbon-based selenide composite exhibits excellent microwave absorption. The maximum reflection loss reaches −52.37 dB at a thickness of 2.9 mm, while the effective absorption bandwidth is 4.43 GHz at a thickness of 1.75 mm. The designed periodic unit cell metamaterial structure, based on MMSC composites, achieves an effective absorption bandwidth of 11 GHz at a thickness of 6.0 mm. This study proposes a novel strategy for synthesizing multi-interface carbon-based bimetallic selenide composites as high-performance microwave absorbers.
研究领域:
材料科学
·
电磁学
·
纳米技术
·
复合材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Shijun Wang,Diansen Li,Yue Zhou,Lei Jiang
The increasing demand for wearable electronics and the intensification of electromagnetic pollution have boosted the exploration of high-performance flexible microwave absorption (MA) materials. Herein, the hierarchical Ti3C2Tx MXene/Ni chain/ZnO array hybrid nanostructures are rationally constructed on cotton fabric for acquiring enhanced MA performance and durable self-cleaning ability. Based on the high dielectric loss capacity of MXenes and ZnO arrays, by controlling dip-coating numbers of Ni chains, the magnetic loss can be manipulated to modulate the impedance matching, reflection loss (RL), and effective absorption bandwidth (EAB, the bandwidth of RL < −10 dB). The minimum RL value of the designed fabric can reach −35.1 dB at 8.3 GHz with a thickness of 2.8 mm, and its EAB can cover the whole X-band with only a 2.2 mm thickness. In addition, the designed fabric also exhibits superior liquid repellency and durable self-cleaning ability due to the combination of the hybrid nanostructures and a superhydrophobic coating. This work provides an insight for rational design of textile-based MA materials, showing potential applications in flexible and wearable functional electronics.
研究领域:
材料科学
·
电磁学
·
纺织工程
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纳米技术
·
可穿戴技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2025
·
IF 9.5
Han Liu,Zhenyu Xu,Zhiyue He,Housheng Mao,Jiayang Lin,Naixin Zhai,Zhenzhi Cheng,Fei Gao,Guangsheng Luo,Weiping Zhou
Ultrathin and broadband microwave absorption materials are urgently needed for mitigating the detrimental effects of electromagnetic pollution for 5G applications and military stealth. In this work, high entropy heterostructured composites composed of oxides/alloys with abundant heterogeneous interfaces are engineered by introducing in-situ metal conductive phase through high-temperature reduction on solid-phase-sintered high-entropy spinel ferrites (CoNiCuX)Fe2O4. By further tailoring the elemental composition (X=Mn, Zn, Mg, Cr, MnMg, and MnCr), the dielectric, magnetic and conduction properties of the high-entropy heterostructured composites are modulated, resulting in enhanced microwave attenuation ability and optimized impedance matching characteristics. As a result, the (Co0.2Ni0.2Cu0.2Mn0.2Mg0.2)Fe2O4 derived high-entropy oxides (HEOs)/ferroalloy dual-phase composite simultaneously exhibits a minimal reflection loss of -48.77 dB accompanied by a maximum effective absorption bandwidth (EAB) of 6.08 GHz (11.92-18 GHz) at a thickness of only 1.5 mm. Furthermore, an ultra-broadband EAB of 11.5 GHz is realized by constructing macroscale gradient multilayer metamaterials with a thickness of 4.0 mm. This study demonstrates that reasonable composition and heterointerfaces engineering can facilitate synergistic effect of polarization loss, conduction loss and magnetic loss, which enables the heterostructured composites to exhibit superior impedance matching and enhanced microwave loss capability, thus achieving superior microwave absorption performance at thin matching thickness.
研究领域:
材料科学
·
微波工程
·
电磁兼容性
·
纳米技术
·
复合材料
·
固体物理学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Kai Xu,Pei Liu,Yinxu Ni,Qingqing Gao,Jin Chen,Shuai Yin,Zixuan Ding,Guohui Tang,Changtian Zhu,Fenghua Liu
Electromagnetic (EM) pollution has emerged as a pressing concern, driving the demand for high-performance microwave absorbing materials. In this work, attapulgite (ATP) was employed as a natural, porous scaffold for the in situ integration of amorphous TiO2, Fe3O4, and polyaniline (PANI), constructing a multifunctional composite with tailored dielectric and magnetic properties. The TiO2 and PANI coatings not only induced strong interfacial and conduction polarization but also formed a continuous 3D conductive network, enabling efficient energy dissipation. Benefiting from the magneto-electric synergy among PANI, TiO2, and Fe3O4, the composite exhibited multiple loss mechanisms and excellent impedance matching. As a result, a minimum reflection loss of -56.24 dB was achieved at 11.63 GHz (2.9 mm thickness), with an ultra-wide effective absorption bandwidth of 8.1 GHz. More importantly, by integrating 3D printing with metamaterial-inspired design, the absorption range was successfully extended into the low-frequency region (4–6 GHz), while simultaneously enhancing structural integrity and corrosion resistance. This study offers a scalable strategy for designing lightweight, corrosion-resistant microwave absorbers by combining hierarchical conductive frameworks with multifunctional components, opening new avenues for next-generation EM shielding and stealth technologies.
研究领域:
材料科学
·
电磁工程
·
纳米技术
·
复合材料
·
腐蚀科学
·
微波技术
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS SCIENCE & ENGINEERING R-REPORTS
·
2025
·
IF 26.8
Qihao Lv,Ruopeng Cui,Peihang Li,Xuefei Zhang,Yongjian Zhang,Chunlei Wan,Renchao Che,Yue Li
Pursuing extremely-thin, high-selectivity, and flexible absorbers is strongly required for mitigating the electromagnetic pollution in various miniaturized and space-limited scenarios, such as flexible electronic devices, cloaking systems, and anechoic chambers. Traditional synthetic methods, focusing on enhancing the real part of the absorbing materials’ permittivity through compositional and microstructural modifications, are however confronted with many limitations and have only reached centi-wavelength thick or even larger, impeding their integration into compact and flexible devices. Herein, we propose an interdisciplinary flexible metagraphene architecture, in which electromagnetic waves are selectively induced by the upper anomalous resonant-antiresonant metasurface into the lower ultrahigh-loss nitrogen-doped wavy graphene-based material for flexible, extremely-thin, and high-selectivity absorption. By overcoming the inherent physical contradiction of high loss and extremely-thin absorption, metagraphene achieves a perfect absorption with a top-class selectivity of 357.1 at a record-breaking thickness down to 0.001 λ 0 ( λ 0 represents the wavelength with the minimum reflection), surpassing state-of-the-art absorbers by 1–2 orders of magnitude. Furthermore, metagraphene offers further thinning potential, large-scale manufacturability, angular stability, and frequency universality, thus promising diversified applications in extremely-miniaturized electronic devices and space-constrained equipment.
研究领域:
电磁学
·
材料科学
·
纳米技术
·
微波工程
·
柔性电子学
·
石墨烯技术
·
吸收体设计
·
超材料
·
电磁兼容
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Renquan Wu,Yijing Sun,Xuzhou Jiang,Shanxin Li,Sichen Guo,Hongying Yu
In response to the increasing challenges posed by electromagnetic pollution, The development of high-performance microwave absorbing materials is increasingly urgent. This study addresses this challenge through synergistic engineering of hierarchical architectures and magnetic-dielectric components, proposing a sequential templating strategy to fabricate hierarchical multi-shell hollow porous (HMSHP) NiO/Co 3 O 4 nanospheres. Systematic characterization reveals that the HMSHP architecture can effectively improve the impedance matching, reduce the material density, extend the microwave transmission path, and significantly enhance the conduction loss and interface polarization loss. In addition, the NiO/Co 3 O 4 heterointerfaces induce polarization loss caused by lattice defects in the shell and magnetic loss due to the magnetic metal oxide components, which synergistically enhance electromagnetic energy conversion. The 3-shell hollow porous NiO/Co 3 O 4 nanospheres (3-NCO) demonstrated superior microwave absorption performance. Specifically, at a low filler ratio (20 wt%) and a thin thickness (2.1 mm), the 3-NCO nanospheres exhibited a significant absorption capacity (−67.62 dB) and a wide effective absorption bandwidth (7.68 GHz). This work reveals a nanostructure design route for designing lightweight, broadband microwave absorbers through rational integration of structural hierarchy and interfacial engineering, offering actionable strategy to fabricating novel microwave absorption nanomaterials.
研究领域:
材料科学
·
纳米技术
·
电磁学
·
环境科学
·
化学工程
✓ 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）