JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2024
·
IF 4.3
Hongsen Chen,Dan Jin,Tingyou Yu,Yuguo Du,Xiaolong Yang
Ti 3 C 2 T x MXene material exhibits exceptional dielectric properties and a distinct layered structure, making it a noteworthy microwave absorbing material. However, its microwave absorption performance is limited due to poor impedance matching and a single loss mechanism. To address these issues, this work develops a solvothermal method to introduce the magnetic component CoNi alloy and generate organic polymer PANI through in-situ polymerization, resulting in the preparation of Ti 3 C 2 T x /PANI/CoNi ternary composites that significantly improve impedance matching and microwave absorption performance. The microwave absorption properties of the binary and ternary composites are compared, and the superior performance of the ternary composites is emphasized. Among the ternary composites, M-P-CN 3:1:8 exhibited an excellent microwave absorption performance, demonstrating a minimum RL value of −55.48 dB and an effective absorption bandwidth of 5.1 GHz at a thickness of 2.0 mm. The synergistic effect of multiple loss mechanisms, multilayer structures, and multiple interfacial polarization methods further contribute to the enhanced microwave absorption performance of ternary composites. This study provides a straightforward method for synthesizing and designing multi-component composite absorbing materials based on MXene.
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 PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Ting Zhao,Han Zhang,Hai-Hong Zhang,De-Qiang Yi,Jian-Feng Zhu,Yi Qin
The rapid development of communications technology has exacerbated the deterioration of the electromagnetic environment and therefore there is an urgent need to develop efficient electromagnetic wave absorbing materials. Based on the idea of constructing the ferrite-alloy-glass multiphase heterogeneous microstructure, core-shell-like NiFe 2 O 4 /Ni 3 Fe/LAS nanocomposites has been successfully prepared by using sol-gel, hydrothermal and in situ reduction methods. In which, NiFe 2 O 4 and Ni 3 Fe provide strong magnetic and dielectric losses , while the introduction of the LAS (Lithium aluminum silicate, Li 2 O–Al 2 O 3 –SiO 2 glass) wave-transparent phase modulates the complex dielectric constant, and effectively improving impedance matching. The multi-component nature of NiFe 2 O 4 /Ni 3 Fe/LAS produces abundant heterogeneous interfaces, and the strong interfacial polarization contributes to the attenuation of electromagnetic waves. At the thickness of 2.3 mm, the reflection loss (RL) of NiFe 2 O 4 /Ni 3 Fe/LAS reaches −50.7 dB at 11.36 GHz with an effective absorption bandwidth (EAB) of 5.04 GHz, while at 2.0 mm the EAB is up to 7 GHz. Importantly, the NiFe 2 O 4 /Ni 3 Fe/LAS nanocomposites achieve effective absorption (RL < −10 dB) in the C, X and Ku bands (5–18 GHz). This work is expected to offer prospects for high-performance and ultra-broadband composite microwave-absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Xiaotong Sun,Ze Wu,Xiuli Tan,Youqiang Xing,Peng Huang,Bingjue Li,Lei Liu
Research on developing highly efficient microwave absorption (MA) absorbers is crucial for addressing electromagnetic (EM) pollution and advancing stealth technology. MXene, a new class of MA materials, have been widely studied . Nevertheless, MXene often faces challenges such as high self-stacking and excessive electrical conductivity, which lead to poor impedance matching. To overcome these problems, the unique manufacturing produces an overall homogeneous and locally aggregated MXene in the form of island chains, enhancing electrical conductivity and polarization loss while alleviating the self-stacking problem of MXene nanosheets. Further improvement is achieved by modifying the N–CNF@MXene aerogel with MoS 2 through atomic layer deposition (ALD). This modification resulted in a layered core-sheath structure featuring the N–CNF@MXene@MoS 2 aerogel (NCMMA) absorber. Importantly, this process preserved the intrinsic structure of the material while significantly enhancing its MA performance. NCMMA has a minimum reflection loss RL min of −78.32 dB (3.49 mm) with a fill factor of only 3.97 %. The effective absorption bandwidth (EAB) is 7.58 GHz (2.5 mm), covering the Ku band. The unique joint process design of hierarchical core-sheath in situ heterogeneous interfaces combined with the complex interpenetrating conductive network structure employed in this work is a strong candidate for MA materials for next-generation lightweight stealth coatings.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 2
·590-597
·
IF 5.934
Xiaoqing Cui,Wei Liu,Weihua Gu,Xiaohui Liang,Guangbin Ji
In recent years, two-dimensional inorganic materials (MoS2) have been promising candidates for EM wave absorber because of their high specific surface area, excellent electronic properties and dielectric loss caused by polymorphism. Nevertheless, the poor impedance matching of individual MoS2 limited its microwave absorption performance. Optimizing the impedance matching of microwave absorber can be an effective way to achieve electromagnetic wave attenuation. In this study, we deposited CoFe2O4 magnetic nanoparticles on the surface of MoS2 nanosheets using reasonable hydrothermal reactions to optimize its poor impedance and enhance interfacial polarization. The MC-6 composite (mMoS2 : mCoFe2O4 = 6 : 1) exhibited excellent microwave absorption capability. The minimum reflection loss (RL) reached −55.3 dB at 16.24 GHz (Ku band) and the effective absorption bandwidth (<−10 dB) was measured to be 6.26 GHz (X band) with a thickness of 1.6 mm. This study confirms that optimizing impedance matching and interfacial polarization of MoS2-based composites play a key role in the microwave response. Moreover, the reasonable optimization of impedance matching enables regulation of the effective bandwidth and strong absorption intensity.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Materials Horizons
·
2025
·
IF 10.7
Yiliang Liu,Ying Lin,Zhixin Cai,Yongzhen Ma,Hongwei Zhou,Wei Chai,Qibin Yuan,Haibo Yang
With the rapid development of modern electronic technology, electromagnetic wave (EMW) absorption materials play a crucial role in solving the problem of electromagnetic radiation pollution. By designing unique microstructures or composite magnetic components, the EMW attenuation ability of carbon nanofibers (CNFs) can be enhanced. However, the ultra-high conductivity of CNFs leads to impedance mismatch, necessitating the introduction of components that can rapidly optimize dielectric properties for improved impedance matching. In this study, Co0.7Fe0.3@CNFs@MnO2 (CFCM) was fabricated by coating MnO2 nanosheets on necklace-like CoFe@carbon nanofiber composites. The coated MnO2 nanosheets not only enhance the EMW attenuation ability, but also improve impedance matching. The results indicate that the minimum reflection loss of the sample is −62.7 dB, and the effective absorption bandwidth reaches 6.5 GHz. This work presents a valuable method to prepare outstanding EMW absorption materials with a necklace-like 3D network hierarchical structure.
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
·
2023
·
IF 9.9
Huying Yan,Yang Guo,Xingzhi Bai,Jiawei Qi,Haipeng Lu
Optimizing and enhancing the performance of electromagnetic wave (EMW) absorption materials relies on the modification of their composition and structure through heterogeneous interface engineering. Ti 3 C 2 T x ’s high conductivity results in an impedance mismatch, which hinders efficient EMW absorption. Herein, a one–step catalytic chemical vapor deposition (CCVD) method is used to construct the Ti 3 C 2 T x /TiO 2 @C heterogeneous structure. Upon annealing at 500 °C, amorphous carbon is uniformly deposited on the Ti 3 C 2 T x surface, thereby incorporating the scale–like TiO 2 generated during the process. The inclusion of the amorphous carbon layer and TiO 2 reduces the substrate’s conductivity, achieving optimized impedance matching. Additionally, building heterogeneous interfaces between Ti 3 C 2 T x , TiO 2 , and C enriches multiple loss mechanisms involving dipole and interfacial polarization, ultimately enabling optimal EMW absorption performance. The minimum reflection loss ( RL min ) value of Ti 3 C 2 T x /TiO 2 @C–500 is –53.12 dB when its thickness and frequency are 1.15 mm and 13.80 GHz, respectively. Moreover, thermal infrared imaging confirms that coatings fabricated using Ti 3 C 2 T x /TiO 2 @C–500 demonstrate a favorable heat dissipation rate, validating its effectiveness in addressing the challenge of efficient heat dissipation in electronic devices. This study significantly contributes to the progress of two–dimensional (2D) materials, enabling high–performance EMW absorption and expanding their applications in complex scenarios.
研究领域:
材料科学
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电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 7
·1625
·
IF 4.6
Qing Tang,Qi Fan,Lei He,Ping Yu,Qing Huang,Yuanming Chen,Bingbing Fan,Kun Liang
MXene is widely used in the fields of microwave absorption and electromagnetic shielding to balance electromagnetic pollution with the development of communication technologies and human health, due to its excellent surface functional groups and tunable electronic properties. Although pure multilayered MXene has an excellent accordion-like structure, the weak dielectric loss and lack of magnetic loss result in poor microwave absorption performance. Here, we propose a strategy for the catalytic growth of CNTs by the electrophoretic deposition of adsorbed metal ions, leading to the successful preparation of Ni-MWCNTs/Ti3C2Txcomposites with a “layer-by-layer” structure, achieved through in situ regulated growth of CNTs. By introducing dielectric–magnetic synergy to improve the impedance matching conditions, and by regulating the diameter of the CNTs to alter the electromagnetic parameters of Ni-MWCNTs/Ti3C2Tx, the 2-Ni-MWCNTs/Ti3C2Txcomposite achieves the best reflection loss (RL) value of −44.08 dB and an effective absorption bandwidth of 1.52 GHz at only 2.49 mm thickness. This unique layered structure and the regulation strategy provide new opportunities for the development of few-layered MXene composites.
研究领域:
材料科学
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电磁学
·
通信技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2018
·
IF 3.057
Mingxu Sui,Tianqi Fu,Xiaodong Sun,Guangzhen Cui,Xuliang Lv,Guangxin Gu
Unary and binary M 2+ (M=Mn, Co, Ni, Zn) substituted hollow Fe 3 O 4 were prepared by one-step solvothermal method. The crystallographic structure, morphology, element components and microwave absorbing properties of as-prepared products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Energy-dispersive X-ray (EDX) and vector network analyzer (VNA). The unary and binary Co 2+ substitution of hollow Fe 3 O 4 could result in a significant improvement of microwave absorption performance, including the expanding of effective absorption bandwidth, the thinner thickness and the increment of absorbing intensity. The sample of CoFe 2 O 4 could reach an optimal reflection loss of − 28.78 dB at 15.52 GHz under the thickness of 1.5 mm, moreover, the efficient absorption bandwidth (less than −10 dB) is expanded to 5.56 GHz which is most outstanding among these samples. The minimum reflection loss of Co 0.75 Zn 0.25 Fe 2 O 4 could reach − 49.60 dB at 9.88 GHz under the thickness of 2 mm. The as-prepared products could be used as microwave absorber with the advantages of strong absorption, broad bandwidth and thin thickness. The favorable performance could be attributed to the strong magnetic loss, dielectric loss and good impedance matching properties.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Ying Liu,Yubo Zhao,Changtu Ma,Min Zhao,Huayun Du,Yang Ge,Jianlong Ji,Kexun Li,Yanxia Wu
Ti 3 C 2 T x MXene has been regarded as a promising candidate for advanced microwave absorption materials. However, the microwave absorbing performance of Ti 3 C 2 T x MXene is suppressed by the single dielectric loss mechanism and impedance mismatch because of the high conductivity. To effectuate a good absorption capability of Ti 3 C 2 T x MXene, this paper constructs a heterostructured Co/Ti 3 C 2 T x hybrid by atomic layer deposition of magnetic Co nanoparticles on Ti 3 C 2 T x nanosheets . The microstructures, magnetism , and microwave absorption behaviors of the Co/Ti 3 C 2 T x hybrids are investigated systematically. The results show that the frequency-dependent electromagnetic parameters of the Ti 3 C 2 T x MXene become tunable by controlling the content of Co decorations, which are conducive to both magnetic loss and impedance matching . The Co/Ti 3 C 2 T x hybrid with ultralow Co decoration content (only 1.52 wt%) achieves the minimum reflect loss of −54.32 dB at a thin matched thickness of 1.29 mm, and the corresponding effective absorption bandwidth with reflection loss below −10 dB reaches 4.29 GHz. The atomic layer deposited magnetic metal nanostructures provides an effective strategy for preparing MXene-based hybrids which not only have high absorption efficiency but also significantly reduce the use of magnetic metals.
研究领域:
材料科学
·
电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Qikui Man,Xueheng Zhuang,Zhenkuang Lei,Shiqi Zhu,Lining Pan,Yu Gao,Guoguo Tan
For obtaining the ecofriendly microwave absorbing composites, flake carbonyl iron was mixed to the flotation carbon waste of titanium slag by ball-milling processes. The composites of 4 h ball-milling present excellent microwave absorbing performance of minimum reflected loss (RL) of −54.9 dB at 7.8 GHz with thickness of 2.6 mm. The same composites provide the performance of RL < −10 dB with the thickness from 1.2 mm to 5 mm at corresponding matching frequency from 3.3 GHz to 18 GHz. It means that the absorbing peak can be tunable at the wide frequency range with only adjusting the thickness. The strong absorbing intensity and wide tunable frequency range are attributed to the proper impedance matching of dielectric property from flotation carbon waste of titanium slag and magnetic property from carbonyl iron. Also, this work provides a research approach for handling industrial waste which contains carbon.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Feng Hu,Jing Li,Xiaoling Peng,Shan Tao,Jingcai Xu,Bo Hong,Xinqing Wang
In this study, the novel Co/C/LaFeO 3 composites were synthesized by in-situ growth of LaFeO 3 on Co/C derived from ZIF-67. The electromagnetic wave (EMW) absorption performance of the Co/C/LaFeO 3 composites was investigated with varying proportions of Co/C and LaFeO 3 . When the weight ration of Co/C to LaFeO 3 was 2:1, the Co/C/LaFeO 3 composites exhibited a remarkable minimum reflection loss (RL min ) of −57.8 dB and demonstrated an effectively absorbing broadband (EAB, RL min ≤ -10 dB) of 5.12 GHz at 1.7 mm. Benefiting from the combined impact of Co nanoparticles, carbon layer, and LaFeO 3 , diverse interfaces and conductive networks were formed, and optimized impedance matching was obtained. In addition, the incorporation of LaFeO 3 significantly enriched the electromagnetic loss mechanisms, ultimately enhancing the comprehensive EMW absorption efficiency of the Co/C/LaFeO 3 composites. This research serves as an essential guide for designing and synthesizing MOF-derived carbon composites with significant EMW absorption capacities.
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
·
2024
·Vol. 59
·期 38
·18090-18104
·
IF 3.5
Gong Xin,Luo Pan,Wang Kaiming,Yang Yang,Zhu Huacheng,Yan Liping,Zhou Yanping
Vanadium nitride (VN) has gained much attention for microwave absorption due to its high electrical conductivity and easily tunable microscopic morphologies. However, its microwave dissipation ability is yet to be enhanced. In this work, vanadium nitride with 3D/2D hierarchical microflower structure is successfully fabricated via a rapid microwave hydrothermal method followed by a nitridation process enabled by the in-situ upstream thermal decomposition of melamine. By incorporating with N-doped graphene (N-rGO) in different ratios, the proportion of conduction loss and relaxation polarization loss in VN/N-rGO could be tuned, yielding a minimum reflection loss of − 45.9 dB at 10.4 GHz with 5 wt% filler loading. Further, to achieve optimal ultra-broadband microwave absorption, a rational double-layer absorber is constructed by attaching the N-rGO layer with lower normalized impedance but high dissipation capability under the VN/N-rGO layer with excessively high normalized impedance, delivering a maximum effective absorption bandwidth of 10.3 GHz at a total thickness of 4.9 mm. Impedance matching and power loss density distribution analysis are done to illustrate the working mechanism of the double-layer structure. Graphical abstract
研究领域:
材料科学
·
电磁学
✓ 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）