PROGRESS IN ORGANIC COATINGS
·
2020
·
IF 4.469
Yibing Ma,YaYa Zhou,Chunhong Qi,Youyi Sun,Yinghe Zhang,Yaqing Liu
A new class microwave absorption coating based on assemblies of core-shell magnetic nanoparticles was facile preparation to improve absorption bandwidth and durability. The microwave absorption coating with a thickness of ca.1.5mm exhibited a wide bandwidth (ca.9.2GHz). Furthermore, the durability of microwave absorption coating was further evaluated. It showed good water-shedding ability and mechanical stability. The excellent performance was mainly attributed to special surface rough structure and low surface energy of coating, resulting from assemblies of core-shell magnetic nanoparticles . These provide a new idea to design and preparation of microwave absorption coating with high performance for application in stealth technology.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Zhongji Qu,Yu Wang,Wei Wang,Dan Yu
The fabrication of flexible microwave absorbers with high-performance has become an arduous challenge for applications of anti-electromagnetic pollution and radar stealth technology. Herein, a series of FeCoNiOx-PDA-rGO absorbers were prepared and coated on the surface of pretreated polyimide (PI) fabric with PDA-rGO, and finally by screen printing FeCoNiOx-PDA-rGO/WPU for acquiring robust microwave absorption performance, in which the first layer of treated PI fabric was used as the microwave-reflection layer, the medium microwave absorbing powder and water-based polyurethane (WPU) hybrid coating served as the microwave-absorbing layer, and the outside hydrophobic polydimethylsiloxane (PDMS) layer was utilized as the microwave-transmission layer. The well-designed microwave absorption fabric exhibits excellent performance in the X-band (8.2–12.4 GHz). The minimum reflection loss (RL min ) value of the designed fabric can reach −74.70 dB with a thickness of 3.97 mm. Meantime, almost in the entire X-band, the sample can absorb more than 99% (RL < -20 dB) of incident electromagnetic waves. Besides, the performance can be adjusted by changing the load rate of each microwave absorbing layer to obtain lighter and thinner samples in practical applications. We believe this work will bring new inspiration to the design of flexible and wearable microwave absorbers.
研究领域:
材料科学
·
电磁学
·
柔性电子
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 4
·3365-3377
·
IF 2.195
Shen Yongqian,Wei Yupeng,Li Jian,Li Qinglin,Ma Jiqiang,Wang Pingbo,Li Bin,He Wenbo,Du Xueyan
High-performance microwave absorbers with excellent absorption ability and superhydrophobic property are extremely significant for the application of stealthy techniques, especially in high-humidity environment. In this research, high-performance Co-C nanofibers (NFs) were prepared via electrospinning mathod by using of poly (vinyl alcohol) (PVA) and Cobalt acetate tetrahydrate (CoAc) solution as precursor with subsequent PVA pyrolyzation and carbonization process. The electromagnetic (EM) parameters and microwave absorption performance of the prepared NFs were investigated with the microwave frequency ranging from 2.0 GHz to 18.0 GHz. Analysis and comparison were performed on the impedance matching and loss mechanisms of each sample. The experimental results indicated that the sample calcinated at 950 °C achieved an optimal reflection loss (RL) of − 33.1 dB and an effective frequency bandwidth of 4.1 GHz under a thickness of 1.5 mm; and that the Co-C NFs membrane with the optimal absorption performance exhibited superhydrophobic property with a contact angle (CA) of 152°, suggesting their promising application to water-resistant stealthy materials.
研究领域:
材料科学
·
电磁材料
·
纳米技术
·
隐身技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 14
·3488
·
IF 3.1
Guan-Hong Liu,Chuan-Ying Wei,Ting Huang,Fei Wang,Jiang-Fan Chang,Qian Sun,Xian-Hui Zhang
This paper introduces a novel method for preparing high-performance, metal-containing carbon foam wave-absorbing materials. The process involves foaming glucose through catalysis by transition metals followed by high-temperature pyrolysis. The resulting carbon foam materials exhibit a highly porous structure, which is essential for their wave-absorption properties. Notably, at a thickness of 2.0 mm, the glucose-derived carbon foam composite catalyzed by Fe and Co (GCF-CoFe) achieved a minimum reflection loss (RLmin) of −51.4 dB at 15.11 GHz, along with an effective absorption bandwidth (EAB) of 5.20 GHz, spanning from 12.80 GHz to 18.00 GHz. These impressive performance metrics indicate that this approach offers a promising pathway for developing low-density, efficient carbon foam materials for wave-absorption applications. This advancement has significant implications for fields requiring effective electromagnetic interference (EMI) shielding, stealth technology, and other related applications, potentially leading to more efficient and lightweight solutions.
研究领域:
材料科学
·
电磁学
·
纳米技术
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBON
·
2024
·
IF 10.5
Yongqian Shen,Jingyu Song,Yingge Xu,Fan Zhang,Haiyan Wang,Furu Zhang,Xin Liu,Chunli Liu,Dong Zhang,Xueyan Du
The use of a metal-organic framework (MOF) confinement strategy to achieve controllable growth and even allocation of magnetic metal nanoparticles (NPs) in carbon nanofibers (CNFs) can significantly improve the microwave absorption performance of absorbers. Herein, we constructed Ni-MOF in the spinning solution and prepared Ni/CNFs with confined structures using electrospinning combined with carbon thermal reduction. The microstructure of Ni/CNFs was regulated by adjusting the amount of organic ligands added. Ni NPs with single domain size and uniform allocation could optimize impedance matching and enhance electromagnetic synergistic effects, which was beneficial for enhancing microwave absorption performance. When the additional amount of organic ligands was 4 wt%, the absorber reached the optimal microwave absorption performance as the filling ratio was only 3 wt%, the minimum reflection loss ( RL ) reached –24.9 dB at 13.6 GHz when the thickness was 2.0 mm, and the effective bandwidth (EBW) attained 5.22 GHz. In addition, the excellent hydrophobic performance of nanofibers (NFs) endowed them with potential self-cleaning functions. In addition, to verify the practical application value of the prepared samples in radar stealth technology, we used computer simulation technology (CST) to simulate the samples. Therefore, this work provides a new approach for the controllable preparation of novel magnetic metal/carbon fiber-based absorbers, and also provides a model reference for the controllable growth of magnetic metal particles in the carbon thermal reduction reaction process.
研究领域:
材料科学
·
纳米技术
·
电磁工程
·
复合材料
✓ 已验证
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
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Jianhao Zhang,Quan Li,Yi Jia,Li Sun,Yang Wang,Sheng Cui,Jian Yang
Developing radar-infrared-compatible stealth materials is challenging because the material performance requirements between infrared and radar stealth are contradictory. At present, ceramic aerogel is one of the candidate materials that may solve this problem. Here, polymer derived SiC/SiOC aerogels were prepared and their microstructures were tailored by annealing temperature. It is found that the synergistic effects of the pore size distribution, the formation of nano-turbostratic carbons (NTCs) network and the content of SiC nanoparticles contribute to the excellent electromagnetic wave absorption and improved infrared stealth performance of SiC/SiOC aerogel. When the thickness of SiC/SiOC aerogel is 1.78 mm, the minimum reflection loss is -53.5 dB and the maximum effective absorption bandwidth is 6 GHz. In addition, SiC/SiOC aerogel exhibits excellent thermal insulation properties and improved low infrared emissivity. This study provides insights for the development of materials with radar-infrared-compatible stealth properties.
研究领域:
材料科学
·
隐身技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Zhang,Xingwei Wang,Shuangshuang Yang,Chuanpeng Li,Tao Dong,Qiangliang Yu
The magnetic microwave absorption (MA) materials are prone to corrosion in high temperature and high humidity environments, leading to a deterioration in the MA performance, so, the development of composite coatings with comprehensive properties such as excellent absorption performance, corrosion resistance , and oxidation resistance holds significant importance in the field of stealth technology. In this study, a core-shell structure MA materials titanium dioxide coated carbonyl iron particle (CIP@TiO 2 ) was prepared and utilized as a filler in the preparation of composite coatings. The results show that the low-frequency impedance modulus of composite coating improves by three orders of magnitude from 4.5 × 10 5 Ω cm 2 to 2.5 × 10 8 Ω cm 2 , demonstrating outstanding corrosion resistance. The TiO 2 shell not only improves CIP's electromagnetic parameters but also optimizes the impedance matching of the composite material. The CIP@TiO 2 coating achieves a minimum reflection loss of −56.8 dB at a thickness of 1.2 mm and an effective bandwidth of 6.57 GHz at a thickness of 0.6 mm, demonstrating excellent absorption performance. This study provides a novel approach for preparing composite materials with superior corrosion-resistant and absorptive properties.
研究领域:
材料科学
·
隐身技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Zihang Zhang,Zixuan Wang,Yanjun Zhang,Peiyuan Zou,Mingyang Zhu,Shuangshuang Li,Xinwei Tang,Yezi Lu,Wei Li,Kaixin Lai,Wei Hong,Yufei Li,Xu Zhang,Zicheng Wang,Tianxi Liu
With the rapid development of 5G technology, the types and numbers of 5G base stations are becoming increasingly large. The precision electronic devices in base stations are at risk of electromagnetic interference and infrared detection. Therefore, it is of great significance to design lightweight and high-strength protective materials with electromagnetic dissipation and infrared stealth performance. In this paper, a rigid polymethacrylimide (PMI) composite foam is fabricated by in-situ copolymerization and free-foaming process. Stable polymerization of PMI and uniform dispersion of CNT are steady controlled. The appropriate pore size and density effectively enhance mechanical properties of PMI/CNT composite foam (PCF). More importantly, the hierarchical impedance matching can be constructed by systematically assembling PCF and silver coating (Ag), endowing it with a low-reflection electromagnetic dissipation performance. Thickness of the composite material can be effectively reduced. In addition, thermal insulation of PCF and low infrared-emissivity of Ag coating bring an excellent infrared stealth performance for PCF/Ag. Such excellent comprehensive performance makes it desirable to be applied as protection material for 5G base stations.
研究领域:
材料科学
·
电磁学
·
隐身技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Chen Li,Leilei Liang,Baoshan Zhang,Yi Yang,Guangbin Ji
The increasing sophistication of modern detection technology requires urgent solutions to the inherent conflict between radar and infrared (IR) stealth mechanisms, further complicated by the difficulties of integrating materials across diverse wavelengths. Here, a synergistic customization of interfacial engineering MXene-integrated aerogel has been developed, featuring a directional regulation of magnetic and dielectric properties. This innovative design incorporates medium-entropy alloy FeCoNi nanoparticles tightly anchored on the surface of a 3D MXene-based skeleton, creating multiple heterogeneous interfaces. The customized strategy leverages the alterations in the magnetic and dielectric components that significantly influence permeability and permittivity to enhance microwave absorption (MA) through magneto-electric synergy. The low emissivity of MXene, combined with the porosity of the aerogel, endows the material with exceptional IR camouflage capabilities. Theoretical and experimental results demonstrate that the FCM aerogel exhibits an excellent absorption bandwidth (EAB = 5.44 GHz) and low-frequency absorption (−27.29 dB at 2.84 GHz), along with reduced radar cross section signals (RCS max = −24.78 dB·m 2 ). Furthermore, the aerogel offers impressive thermal insulation (ΔT = 80 °C), IR emissivity (0.38), and multifunctionality (lightness, compressibility, hydrophobicity, and flame retardancy). This work provides a strategy for developing adaptable radar-IR compatible camouflage design for complex environments.
研究领域:
材料科学
·
纳米技术
·
电磁兼容性
·
航空航天工程
·
隐身技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2025
·
IF 14.2
Chunmiao Liu,Yurun Feng,Haibin Sun,Qiangqiang Hu,Hui Xiao,Xue Guo,Huaiqing Zhang
The increasingly complex electromagnetic environment and escalating stealth technology requirements pose unprecedented challenges to multifunctional electromagnetic wave (EMW) absorbing materials. While significant progress has been made, existing SiBCN material systems still struggle to simultaneously achieve broadband absorption and strong attenuation. In response to this demand, we propose a Fe-Co-Ni ternary co-doping strategy from the perspective of multiple doping and magnetic medium coupling. By precisely controlling the content of magnetic elements, the synergistic effect between magnetic loss and dielectric loss is realized. The experimental results show that the minimum reflection loss (RL min ) of the optimized SiBCN/Fe-Co-Ni fibers reach -53.19 dB, and a broadband absorption of 5.36 GHz is achieved at a thickness of 1.98 mm. More importantly, the material maintains excellent stealth performance across a wide range of incident angles. Capitalizing on these outstanding properties, we have successfully designed a low radar cross-section (RCS) stealth antenna. The antenna exhibits a 27.5 dBsm RCS reduction at 9.24 GHz. This work not only clarifies the synergistic mechanism of multiple magnetic doping to regulate electromagnetic parameters, but also provides new ideas for the development of new generation of smart stealth materials and devices.
研究领域:
材料科学
·
电磁学
·
天线设计
·
隐身技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Tao Chen,Yuefeng Yan,Siqian Liu,Ziyan Cheng,Boshi Gao,Dechang Jia,Yu Zhou,Xiaoxiao Huang
Developing efficient electromagnetic wave absorbing materials that offer both broadband and stability, while enabling simultaneous solutions for equipment stealth and personal protection, remains a critical challenge today. In this work, aramid nanofiber (ANF)/graphitized multiwall carbon nanotube (GMWCNT) composite fibers are prepared via a wet spinning and sol–gel transformation strategy, and further woven into fabrics. Within the composite fibers, GMWCNT bundles around the ANF skeleton to form a continuous conductive network, while generating abundant heterointerfaces. The insulating ANF matrix effectively modulates the impedance characteristics of the composite. Benefiting from the synergistic effects of conduction loss in the micro-macro electrical network and heterointerface polarization, the ANF/GMWCNT composite fiber fabric-2 (AGCFF-2) with an areal density of 7.1×10 −3 g/cm 2 achieves a minimum reflection loss of −75.18 dB, with an effective absorption bandwidth (EAB) of 7.68 GHz. Remarkably, the fabric maintains outstanding performance after heat treatment at 350°C in air, exhibiting an expanded EAB of 8.02 GHz, demonstrating exceptional stability. Additionally, it exhibits a rapid Joule heating response and excellent electromagnetic stealth capability confirmed by radar cross-section simulation. This work provides new insights for designing lightweight, flexible, multifunctional, and high-performance electromagnetic wave absorbers for complex application scenarios.
研究领域:
材料科学
·
电磁功能材料
·
纳米复合材料
·
柔性电子学
·
隐身技术
✓ 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）