COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Huaiyu Dong,Shuailong Gao,Chen Yu,Zhichen Wang,Yixing Huang,Tian Zhao,Ying Li
Despite numerous reports on microwave absorbing materials and structures with excellent performance, research on the impact of the carrier of microwave absorbers and their preparation processes on microwave absorption performance still faces challenges. To address this issue, this study combines theoretical analysis, simulation, and experimental validation to compare the differences in microwave absorption performance between 3D printed ABS/CF/MWCNTs materials and traditionally cast paraffin/CF/MWCNTs materials. Furthermore, the study explores the impact of linear and concentric filling patterns in 3D printing processes on the performance of tree-shaped microwave absorbing meta-structures. From a material level perspective, the 3D printed ABS/CF/MWCNTs composite plate with a thickness of 3 mm has an effective absorption bandwidth of 5.16 GHz. Additionally, the bio-inspired tree-shaped structure optimized by the ant colony algorithm achieves an effective absorption bandwidth of up to 11.5 GHz at a thickness of 10.8 mm, with a minimum reflection loss of less than −9 dB across the entire frequency range (2–18 GHz). Moreover, the microwave absorbing meta-structure reinforced with carbon fiber-reinforced plastic laminates exhibits outstanding tensile and bending strength, with an average tensile strength and bending strength reaching 197.7 MPa and 188.6 MPa, respectively. In summary, this study provides valuable insights into the optimization of preparation processes for microwave absorbing materials or structures and offers a scientific basis for the design and application of high-performance microwave absorbing materials.
研究领域:
材料科学
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电磁学
·
制造工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Jing Wang,Yuping Wang,Junye Cheng,Yiru Fu,Yao Li,Wangli Nie,Jingwei Wang,Bin Liu,Deqing Zhang,Guangping Zheng,Maosheng Cao
Defect engineering could provide new ideas for the design of transition metal disulfide electromagnetic wave (EMW) absorbers with high performance. Since the effects of dipoles on impedance matching and EMW absorption are crucial for the development of novel absorbers, the polarization attenuation dependence on defect engineering should be understood at micro- and macro-scales. In this paper, it is found that the defect-rich WS 2 nanoflowers synthesized by the cold plasma method possess excellent EMW absorption properties. Cold plasma treatment of materials is easy to perform and maintains the original shape of the material to a high degree. The formation of defects results in abundant electrochemically active sites, increased multiple reflection losses, improved dielectric properties and impedance matching in the materials. The RL min of the defect-rich material with a thickness of 3.19 mm is as high as −54.36 dB at 8.16 GHz, and the effective absorption bandwidth is 4.72 GHz. The results reveal that the formation of defective vacancies enhances the effects of dipole polarization of the material on improving its EMW absorption properties. Thus, this work provides not only a facile preparation route for novel EMW-absorbing materials, but also a new strategy for tunning defects in transition metal disulfides.
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Huanqin Zhao,Xin Yang,Jiachen Sun,Hualiang Lv,Xiaohuan Liu,Xuke He,Changqin Jin,Renchao Che
Three-dimensional (3D) carbon aerogel with high porosity and lightweight merit has emerged as an important high-performance electromagnetic (EM) absorption material. Despite great progress has been made, most reported 3D carbon aerogels suffer from non-renewability and high cost. Moreover, the randomly distributed porous structure restricts the effective regulation of microwave absorption. Herein, the sustainable shaddock peel cellulose (SPC) was adopted to construct an ultralight and orientated carbon aerogel through a facile bidirectional freezing technique and subsequently thermal treatment process. The resultant carbon aerogel is composed of ordered lamellar layers interconnected by supported bridges, forming a continuous 3D conductive network. Addition of a small amount of graphene oxides (GO) nanosheets in biomass aerogel enhances the interaction of SPC and promotes electron transmission along 3D conductive network. Through tuning the lamellar spacing of aerogel, the as-prepared carbon aerogel achieves a remarkable microwave absorption property with a strong reflection loss (RL) of -63.0 dB and broad effective absorption bandwidth (EAB) of 7.0 GHz under ultralow filler content of 4 wt.%. Moreover, this carbon aerogel also demonstrates excellent thermal insulation property, and is even comparable to commercial products. The present work paves the way for designing low-cost and sustainable biomass-derived carbon aerogel for lightweight and high-performance microwave absorption and infrared stealth function.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2025
·
IF 7.7
Guodong Han,Fangyuan Qi,Yong Sun,Junxiang Zhou,Yudeng Wang,Sai Sui,Bo Feng,Yuxiang Jia,Xiaoxia Tian,Xiaokun Wang,Jiafu Wang,Shaobo Qu
Biomass-derived porous carbon materials are simple, low-cost, convenient, and sustainable materials with several advantageous features, such as multilevel porosity and structural repeatability. Herein, a new strategy involving the use of peanut shells and Fe 3 O 4 to prepare excellent absorbing materials is reported. During the carbonization process, the peanut shells transform into interconnected honeycomb-like porous carbon and Fe 3 O 4 nanoparticles are synthesized from FeCl 3 · 6H 2 O, FeCl 2 · 4H 2 O, and NH 3 · H 2 O through a hydrothermal method. The obtained microwave absorption materials (MAMs) P-C-800@Fe 3 O 4 (1:0.5) exhibits outstanding MA performance. The composite exhibits the minimum reflection loss ( RL , −59 dB) at a thickness of 3.9 mm, and the effective absorption bandwidth ( RL < −10 dB) reaches 5.98 GHz at 2.3 mm. The synergistic enhancement between dielectric and magnetic losses enhances the MA capability of the honeycomb-like composite materials. Overall, this paper provides a prospective and convenient strategy for preparing biomass-derived honeycomb-like carbon for MA applications.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Kai Wang,Zhenying Liu,Shouwu Huang,Jiayi Song,Shaofeng Dong,Tingting Pan,Qiaoyuan Wang,Yin Liu
Ni 0.2 Mn 0.4 Zn 0.4 Fe 2 O 4 (NMZF) nanoparticles were anchored on the surface of MXene(Ti 3 C 2 T x ) to form Ti 3 C 2 T x /NMZF nanocomposites for optimization of microwave absorption performance. The Ti 3 C 2 T x /NMZF nanocomposites were synthesized by using a four-step strategy, including sonication, stirring, hydrothermal reduction and vacuum drying. More than 40 percent of the NMZF nanoparticles in this nanocomposite were assembled to form a conductive network. Meanwhile, the multilayer MXene acted as a framework to host the NMZF nanoparticles, providing dipolar polarization, interfacial polarization and eddy current loss. Benefiting from the structure design of MXene, combined with magnetic materials and optimized impedance matching, the Ti 3 C 2 T x /NMZF exhibited a minimum reflection loss (RL min ) of −57.39 dB, with a thickness of 2.97 mm and an effective absorption bandwidth (EAB) of 3.2 GHz. Therefore, such a facile method could be used to construct nanocomposites with microwave absorption performance (-57.39 dB, 3.2 GHz), so as to address microwave pollution issues.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 11
·806
·
IF 4.3
Xiaojiao Yang,Shuai Han,Hongna Xing,Yi Dong,Xia Deng,Yan Zong,Juan Feng,Xiuhong Zhu,Xinghua Li,Xinliang Zheng
MOFs-derived magnetic carbon-based composites are considered to be valuable materials for the design of high-performance microwave absorbents. Regulating phase structures and introducing mixed-valence states within the composites is a promising strategy to enhance their charge transfer properties, resulting in improved microwave absorption performance. In this study, iron oxide components show a temperature-dependent phase evolution process (α-Fe 2 O 3 →Fe 3 O 4 →Fe 3 O 4 /FeO), during which the valence states of iron ions are regulated. The tunable phases modulate the magnetic Fe 3 O 4 component, resulting in enhanced magnetic loss. The changed valence states affect the polarization relaxation by adjusting the electronic structure and tune the electron scattering by introducing defects, leading to enhanced dielectric loss. The microwave absorption properties of iron oxide@carbon composites display phase- and valence state-dependent characteristics. Especially, Fe 3 O 4 @C composites exhibit superior microwave absorption properties, ascribed to the improved magnetic/dielectric losses induced by good impedance matching and strong microwave attenuation capacity. The minimum reflection loss of Fe 3 O 4 @C composites reaches −73.14 dB at 10.35 GHz with an effective absorption bandwidth of 4.9 GHz (7.69–12.59 GHz) when the absorber thickness is 2.31 mm. This work provides new insights into the adjustment of electromagnetic parameters and microwave absorption properties by regulating the phase and valence state.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jiabao Zang,Haifeng Li,Qingzhi Zhu,Ziheng Wang,Hubuli Bazaerbieke,Li Sun,Meijie Zhang
There are few reports about the electromagnetic wave (EMW) absorption properties of α−SiC based composites, and almost all of them focus on β−SiC polymorphs. In this study, α−SiC p /α−SiC nw /SiO 2 /C hybrid composites (sample SiC−C1500) with heterostructure α−SiC nanowires (α−SiC nw ) of multiple interfaces 4H−SiC/6H−SiC/SiO 2 /C were successfully prepared using mixed powder (α−SiC+m−SiO 2 +C) as raw material based on the heterogeneous nucleation−growth mechanism, and their microwave absorption properties were investigated. Meanwhile, the samples SiC−V2150 and Si−C1500 were obtained by vacuum calcination (α−SiC+m−SiO 2 +C) at 2150 0 C and carbothermal reduction (Si+m−SiO 2 +C) at 1500 0 C, respectively, and their phase compositions were α−SiC p /C and β−SiC p /β−SiC nw /SiO 2 /C, respectively. The sample SiC−C1500 exhibited excellent EMW absorption properties, with a minimum reflection loss (RL min ) value of −18.37 dB at a thickness of 1.3 mm, and a maximum effective absorption bandwidth (EAB max ) value of 4.9 GHz at a thickness of 1.5 mm. In contrast, the EMW absorption performance of the samples SiC−V2150 and Si−C1500 was obviously poor, which was consistent with the RCS (Radar Cross−Section) simulation results. The formation of α−SiC p /α−SiC nw /SiO 2 /C composites (sample SiC−C1500) containing 4H−SiC/6H−SiC/SiO 2 /C multi-interfaces heterostructure α−SiC nanowires (α−SiC nw ) was analyzed. The excellent EMW absorption performance of SiC−C1500 sample could be attributed to the effective regulation of α polymorphs, nanowire heterostructure, multi−component hybridization. This study supplies a helpful experience and reference for improving the high temperature EMW absorption performance of SiC matrix composites.
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 & DESIGN
·
2019
·
IF 5.77
Lulu Xu,Ye Xiong,Baokang Dang,Zhangning Ye,Chunde Jin,Qingfeng Sun,Xiaohong Yu
Lightweight aerogels with superior cavities have attracted great interest in the field of electromagnetic wave absorbing materials. In this work, a hierarchical porous wood aerogel modified with Fe 3 O 4 /ZIF-67 (Fe 3 O 4 /ZIF-67@WA) with high compressibility and low-density was fabricated by in-situ anchoring of magnetic Fe 3 O 4 /ZIF-67 rhombohedral dodecahedron in naturally delignified wood aerogel. Combining the advantages of both aerogels and magnetic Fe 3 O 4 /ZIF-67 particles, Fe 3 O 4 /ZIF-67@WA reveals excellent compression-resilience and efficient microwave absorption performance. It possesses a maximum reflection loss (RL) of about −23.4 dB at a low thickness of 1.5 mm and a specific electromagnetic shielding effectiveness of up to ~156.3 dB cm 3 g −1 . Moreover, the composites exhibit a broad absorption bandwidth under an ultrahigh frequency of 13.5–18.0 GHz. In view of those excellent absorbing effects, the prepared green magnetic Fe 3 O 4 /ZIF-67@WA is likely to be used as a lightweight shielding material against electromagnetic radiation, especially for smart building and miniaturized device applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 7
·1810-1818
·
IF 6.569
Yabin Ma,Bin Quan,Zhihui Zeng,Yunke Zhang,Lan Zhang,Yu Wang,Xiaogu Huang
Strong electromagnetic (EM) response at low thickness is urgently required to address the emerging EM radiation pollution. Among numerous methods to achieve electromagnetic response at low thickness, interface construction exhibits some advantages for the combination of numerous dissipation mechanisms. Here, ternary Mo-Ni2P/rGO absorbers with multiple interfaces are designed via the phosphating treatment at a certain temperature. The constructed heterojunctions can efficiently exploit the high-conjunction of Ni2P and rGO and the interactions between different dielectric media (metal/semiconductor/conductor) for excellent electrical conductivity, abundant interfacial polarizations, and rational combination of different loss materials. As the phosphating temperature increases from 600 to 800 °C, the Mo-Ni2P/rGO-800 sample exhibits excellent microwave absorption performance, where the reflection loss (RL) value is −35.43 dB, and the effective bandwidth reaches 3.48 GHz at only 1.20 mm. This study proposes a simple method to enhance the microwave absorption performance at low thickness based on the construction of heterojunction structures. Moreover, an insight into the role of integrating different loss mechanisms in achieving high-efficiency EM wave absorbers has been fulfilled.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2020
·
IF 2.029
Ying Zhai,Dongmei Zhu,Qiang Chen,Hanyi Nan
Herein, we report a novel multi-component electromagnetic microwave absorber with oriented flaky carbonyl iron&MoS 2 (FCI&MoS 2 ) as fillers and polyurethane (PU) as matrix. The SEM and VNA were utilized to analyze the morphology, electromagnetic and microwave absorption properties of the prepared oriented FCI&MoS 2 /PU composites with different multi-component proportions. The reflection loss (RL) and Z in /Z 0 values are calculated based on the complex permittivity and permeability. The results demonstrate that the oriented arrangement, synergistic effect and appropriate proportion of FCI&MoS 2 fillers are contributed to improve the impedance matching and microwave attenuation of the prepared composites at thin thicknesses of 0.8 mm and 0.9 mm.
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
·
2020
·Vol. 31
·期 15
·12830-12841
·
IF 2.22
Li Xiang,Zhu Yao-Feng,Meng Fan-Bin,Ni Qing-Qing
Micro-nano structure regulation of polyaniline and impedance-matching design of its composites are two crucial but challenging works in microwave absorption. In this study, an in situ sacrificial templates polymerization is applied to regulate the porous structures of polyaniline decorated on vapor-grown carbon fiber (VGCF). By manipulating porous polyaniline structures, heterogeneous interfaces, polarization centers, and geometric structures are introduced into porous VGCF@polyaniline nanohybrids. Porous VGCF@polyaniline demonstrated robust microwave absorption ability with a minimum reflection loss of − 55.9 dB at 10.3 GHz with a filler loading of 18 wt% and a thinner thickness of 1.33 mm. The investigation of the novel porous polyaniline structures and composition relationship suggest that the microwave absorption ability of porous VGCF@polyaniline is originated from the optimal impedance-matching ratio, enhanced dielectric loss, and synergistic effect, which is enhanced by conductive loss and interfacial polarization. A universal approach was proposed to address the critical issue of hybridizing porous VGCF@polyaniline with flexible polyurethane sponge as practical electromagnetic absorption structures. The hybrids exhibited interesting dual absorption properties with minimum reflection loss of − 28.8 and − 35.5 dB at frequencies of 8.5 and 8.7 GHz, respectively. This study provides a new approach for designing lightweight and practical microwave absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 102
·100585-100589
·
IF 3.289
Haibo Yang,Ning Han,Ying Lin,Ge Zhang,Lei Wang
Polyaniline/CoFe2O4/polyvinylidene fluoride (PANI/CoFe2O4/PVDF) composites were synthesized by an in situ polymerization method. The electromagnetic data demonstrate that the PANI/CoFe2O4/PVDF composite exhibit an excellent microwave absorption in the range of 2.0–18.0 GHz. The maximum reflection loss (RL) value can reach −57.7 dB at 7.6 GHz with a thickness of 4 mm and the absorption bandwidth with the RL below −10 dB is up to 3.4 GHz (from 6.5 to 9.9 GHz), which indicates that the microwave absorbing properties of the PANI/CoFe2O4 composite can be enhanced by the introduction of PVDF and the PANI/CoFe2O4/PVDF composite has potential applications for high-efficient microwave absorbers.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）