JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Keru Song,Anze Shui,Mingyuan Hu,Hulei Yu
Transition metal dichalcogenides (TMDs) with regulated band structures and multilayered structures have attracted considerable interest in microwave absorption materials. However, the rational design of the hierarchical structure with phase and defect from a microscopic perspective remains challenging. Here, the O-doped 1 T/2H MoS 2 heterojunction is successfully fabricated with a hierarchical morphologically controllable 3D flowerlike structure using the cetyltrimethylammonium bromide template method. It is found that the heterogeneous interface between 1 T and 2 H MoS 2 phases can increase interfacial polarization, and the defects with O dopants and vacancies are beneficial to improve dipole polarization and conductive loss. Such a synergism results in a significantly enhanced electromagnetic wave absorption (EMWA) in these O-doped 1 T/2H MoS 2 samples, achieving the minimum reflection loss (RL min ) of −55.28 dB at a matching thickness of 2.53 mm and an effective absorption bandwidth of 5.05 GHz at 1.88 mm in the as-fabricated MS0.3C-40 samples. Meanwhile, the RL min of the as-fabricated MS0.3C-50 samples reaches −55.24 dB at a matching thickness of 2.29 mm with a maximum radar cross-section of 38.72 dB∙m 2 . These findings pave the way for optimizing the EMWA performance of TMDs with the synergism of phase engineering and defect engineering.
研究领域:
材料科学
·
纳米技术
·
电磁学
·
固体物理
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yujie Hu,Guoheng Sun,Qian Zhang,Mingliang Li,Jinpeng Zhu,Gang Shao,Hailong Wang,Hongliang Xu,Hongxia Lu
Perovskite has emerged as a novel absorbing material due to its superior electrical conductivity, high coordination number, and structural controllability. Aiming at the problem of narrow absorption bandwidth caused by the limitation of electromagnetic wave attenuation in the single dielectric loss mechanism, this paper innovatively constructed a cooperative loss system by introducing a high-entropy effect in perovskite. By carefully selecting elements, controlling particle size, and the use of high-entropy effect to reduce material melting point, we successfully synthesized a novel high-entropy perovskite ceramic Sr(Cr 1/5 Mn 1/5 Fe 1/5 Co 1/5 Ni 1/5 )O 3-x via solid-phase one-step sintering. The phase composition, microstructure, magnetic properties, and microwave absorbing characteristics were systematically investigated. Experimental results demonstrate that when sintered at 1300 °C, the sample achieves a minimum reflection loss of −41.69 dB at 13.68 GHz, with a maximum effective absorbing bandwidth of 7.25 GHz at 2.10 mm. Meanwhile, its electromagnetic wave absorbing performance can effectively cover the C, X, and Ku frequency bands (4–18 GHz), demonstrating excellent wideband characteristics. This broadband absorption property makes the material suitable for multi-frequency and complex electromagnetic environments. The component regulation strategy based on high-entropy design not only successfully induces the magnetic-dielectric synergy effect, but also significantly improves the wideband electromagnetic wave absorption performance of the material, thereby effectively solving the problem of narrow absorption bandwidth of traditional absorbing materials. Compared with the liquid-phase method and the traditional solid-phase method, the one-step sintering of the solid-phase method significantly improves the synthesis efficiency, providing strong support for large-scale production applications and having practical application prospects.
研究领域:
材料科学
·
电磁学
·
陶瓷工程
·
固体物理
·
微波技术
✓ 已验证
产品关联
DOI
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
ACS Applied Electronic Materials
·
2025
·
IF 4.7
Jing Zhang,Zhi Song,Yao Wei,Xiaoyu Li,Xingyao Li,Yu Hua,Qingguo Ren,Xiaolin Lan,Yi Hou,Lixi Wang
The development of high-performance microwave absorbers with strong absorption intensity, broad absorption bandwidth, and thin matching thickness remains a focal point in the field of electromagnetic (EM) attenuation materials. The synergistic design and construction of microstructures based on multiple polarization and loss mechanisms represent an effective approach to achieve this objective. Metal–organic frameworks (MOFs) inherently possess both magnetic and dielectric capabilities, making them excellent templates for high-performance microwave absorbers. However, single-component MOF-derived absorbers still suffer from insufficient absorption efficiency and a narrow effective bandwidth. Herein, a 0D/1D composite optimization strategy combining both component design and microstructure engineering is proposed to enhance EM attenuation in MOF-derived absorbers. The design features a cubic dual-phase CoFe alloy to serve as a magnetic loss framework. Meanwhile, the in situ grown CNTs endow the nanocomposite with substantial conductive loss, as well as the enhancement of interfacial polarization and dipole polarization. The resultant CoFe@CNTs nanocomposite achieves a minimal reflection loss of −49.63 dB at 16.88 GHz (1.5 mm thickness) and 6.32 GHz EAB at 1.71 mm. Compared to single-component Co nanoparticles, the superior absorption performance with lower RL, wider bandwidth, and thinner thickness makes the CoFe@CNTs nanocomposite an ideal highly effective EM absorption candidate.
研究领域:
材料科学
·
电磁学
·
纳米技术
·
微波工程
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Hao Tian,Jie Ma,Bai Yang,Ran Li,Ronghai Yu
It is necessary to broaden absorption bandwidth, regulate applied frequency, reduce the weight and maintain strong absorption for magnetic microwave absorbing materials by constructing suitable material structures to satisfy the requirements for wide applications in various electromagnetic devices. In this work, well-structured amorphous-Co@Nd(BO 2 ) 3 /rGO nanocomposites have been fabricated using a selective chemical reduction in a mixed aqueous solution containing Co 2+ and Nd 3+ ions along with GO sheets reduced by NaBH 4 as the reductant, in which only Co 2+ and GO but no Nd 3+ ions were reduced. Very low coercivity of 0.4 Oe is achieved in amorphous-Co@Nd(BO 2 ) 3 /rGO nanocomposites due to amorphous Co@Nd(BO 2 ) 3 core-shell nanoparticles uniformly anchored on rGO sheets. These soft magnetic rGO-based nanocomposites exhibit high-frequency microwave absorption performance including a minimum reflection loss ( RL min ) value of −84.09 dB at 15.38 GHz for a 2.1 mm thickness at an applied frequency range (12.31–18 GHz) covering almost the entire Ku band. Moreover, a much wider absorption band of 7.24 GHz (10.67–17.89 GHz, RL ≤ −10 dB) with a 2.3 mm thickness along with a RL min value of −35.92 dB is also achieved. These rGO-based magnetic composites also show good structural stability , low density and easily controlled material compositions along with facile chemical fabrication suitable for mass production, which promises their latent use in high-performance microwave absorbing devices. Crystallization behavior of a new amorphous Nd(BO 2 ) 3 phase was also investigated.
研究领域:
材料科学
·
电磁工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiaojiao Du,Tianzheng Cao,Pengfei Wu,Haijiang Kou,Zhicheng Yao,Pengfei Gao,Disheng Pan,Chao Zhang
In order to obtain materials with comprehensive microwave absorption performance for outdoor corrosive environmental applications, this paper constructed low-density CoFe-C porous polyhedrons with SiO 2 nanoparticles coating using ZIF-67 template, chemical synthesis, and sintering methods (abbreviated as CoFe-C@SiO 2 ). The different magnetic Fe contents (mass of raw material ferrocene) were used to adjust the microstructure and microwave absorption performance of CoFe-C@SiO 2 . The results show that after sintering, the C=N bond, C-N bond, and Co 2+ in ZIF-67 decomposed to generate Hcp-graphite C, Fcc-Co, and a small amount of CoO. Increasing Fe content reduced the reflection loss and increased the effective absorption bandwidth of CoFe-C@SiO 2 . The optimal absorption performance (a reflection loss of −58.3 dB, an effective absorption bandwidth of 5.41 GHz) at a thin thickness (1.70/1.73 mm) was obtained. The moderate attenuation constant and widest impedance matching band resulted in the optimal absorption performance. Dielectric loss was the primary loss mechanism of CoFe-C@SiO 2 . The simulation of radar cross section values confirmed the enormous potential of CoFe-C@SiO 2 to achieve stealth under radar detection by increasing the Fe content. Coating SiO 2 nanoparticles improved absorption and anti-corrosion performances of CoFe-C. This paper establishes a design strategy for high-performance radar-absorbing materials that are resilient to outdoor corrosion.
研究领域:
材料科学
·
微波吸收材料
·
纳米复合材料
·
防腐涂层
·
电磁功能材料
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 33
·2132
·
IF 2.8
Xiao Hongbo,Feng Chaochao,Chen Yangdie,Lin Zhenqin
Traditional ZnO-based microwave absorbers and monometallic ZIF systems suffer from narrow effective absorption bandwidths due to impedance mismatch and insufficient magnetic-dielectric synergy. To address these limitations, this study proposes a self-sacrificial template strategy for constructing Zn/Co bimetallic zeolitic imidazolate frameworks (ZIFs) using spherical ZnO as a dynamic coordination host. Unlike conventional hard-template routes, the self-sacrificial templating strategy allows atomic-level control over morphology and composition via in-situ dissolution–recrystallization, leading to hierarchical architectures with rich heterointerfaces. By tuning the Co 2+ content (0.1–0.3 g) and pyrolysis temperature (700–900 °C), the resulting carbon-based composites exhibit precisely regulated microstructures and balanced electromagnetic properties. The structural evolution and composition were systematically investigated using X-ray Diffraction (XRD), Transmission Electron Microscopy (TEM/HRTEM), X-ray Photoelectron Spectroscopy (XPS), and Vibrating Sample Magnetometry (VSM). The optimized derivative pyrolyzed at 800 ℃ (PSE3-2–800) exhibited exceptional microwave absorption performance, achieving a minimum reflection loss (RL min ) of − 51.24 dB at 4.2 mm thickness and an ultra-wide effective absorption bandwidth (EAB) of 7.36 GHz (10.64–18.00 GHz) at 2.3 mm. Structural and compositional analyses revealed that the hollow architecture formed via ZnO carbothermal reduction, coupled with graphitized carbon matrices embedded with Co 3 ZnC nanoparticles and atomic Co-Nx sites, synergistically enhanced dielectric polarization, magnetic resonance, and multi-path scattering. This work provides a paradigm for designing lightweight broadband absorbers through defect engineering and bimetallic coordination, overcoming the limitations of single-component systems in balancing impedance matching and multi-loss mechanisms.
研究领域:
材料科学
·
微波吸收材料
·
金属有机框架（MOFs）
·
电磁功能材料
·
纳米复合材料
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·Vol. 35
·期 33
·2502480
·
IF 19
Naixin Zhai,Zihao Wang,Zhenzhi Cheng,Zhihao Xu,Keke Guo,Weiping Zhou,Fei Gao,Guangsheng Luo,Guangbin Ji
Multidimensional heterogeneous interface construction and multicomponent dielectric gene optimization have emerged as viable strategies for the design of high-performance microwave absorbing materials (MAMs) with broad effective absorption bandwidth (EAB). Herein, V 2 O 3 /VO/C@Ti 3 C 2 T X /TiO 2 composites with multidimensional heterostructures are prepared through the electrostatic self-assembly of modified MIL-88B(V) with MXene followed by carbonization. A synchronous manipulation of dielectric genes and the intensity of the built-in electric field (BIEF) is realized by tailoring the carbonation temperature of the precursor. The electron transport properties at the heterogeneous interfaces are precisely modulated by the design of several heterojunctions and BIEFs. Simultaneously, based on theoretical computational simulations and verifications, it is found that the spontaneous BIEF generated by in situ-constructed heterojunctions can activate the Mott–Schottky barrier, balancing the fermi energy levels on both sides of the interface and enhancing the interface polarization. Benefiting from dielectric gene modulation and the construction of BIEF system, the prepared composites exhibited an RL of –50.10 dB and an EAB value of 6.16 GHz with a fill ratio of 20%. This work offers rational insights for the design of multidimensional heterostructures and the optimization of electron transport properties at heterogeneous interfaces, ultimately aiding the development of stealth materials intended for electronic countermeasures.
研究领域:
材料科学
·
电磁功能材料
·
微波吸收材料
·
纳米复合材料
·
介电性能调控
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 21
·1-15
·
IF 2.8
Lu Jiaqi,Li Runkang,Cui Yi,Wang Ronglin,Lv Dongfeng,Wei Yingna,Chen Yuejun,Wei Hengyong,Bu Jinglong
Zirconium nitride nanofibers were synthesized by electrospinning method combined with carbon thermal reduction nitridation process, with zirconium chloride octahydrate and polyvinylpyrrolidone as raw materials. The phase composition, morphology and pore structure of the as-prepared nanofibers were analyzed by XRD, XPS, SEM, TEM and BET. In addition, the microwave absorption properties were measured using transmission line theory utilizing a vector network analyzer of zirconium nitride nanofibers/paraffin composites with different filler loadings. The results show that the as-prepared nanofibers are ZrN phase. The zirconium nitride nanofibers contain residual oxygen and carbon to form Zr(N,C,O) solid solution. The average diameter of the nanofibers is approximately 300 nm. There are particles distributed in it and the particle size ranges from 100 to 200 nm. The specific surface area of zirconium nitride nanofibers is 176.7 m 2 /g, and their pore volume is 0.26 cc/g. The pore sizes are mainly distributed at 3 nm. The granular structure and abundant pores of zirconium nitride nanofibers provide suitable conditions for impedance matching, interfacial polarization, multiple reflections, and scattering. These nanofibers exhibit excellent microwave absorption performance, achieving an optimum reflection loss of − 55.11 dB at a thickness of 1.55 mm with an effective absorption bandwidth of 3.51 GHz when the filler loading is 35 wt%. This study suggests that zirconium nitride nanofibers with good microwave absorption performance have the potential as novel transition metal nitride microwave absorption candidate materials.
研究领域:
材料科学
·
纳米技术
·
微波吸收材料
·
陶瓷
·
电磁功能材料
✓ 已验证
DOI
高影响因子
POWDER TECHNOLOGY
·
2018
·
IF 3.23
Hongjing Wu,Shaohua Qu,Kejun Lin,Yuchang Qing,Liuding Wang,Yuancheng Fan,Quanhong Fu,Fuli Zhang
It has been rarely reported that the microwave absorption materials can exhibit excellent low-frequency EM wave absorbing properties. In this paper, we synthesized steady short carbon fibers (SCFs)@TiO 2 composites by using simple one-pot hydrothermal process. The conductive short carbon fibers could be separated by TiO 2 nanoparticles from each other and reduced the conductivity of composite materials as a whole, meeting the requirements of impedance matching . With the introduction of SCFs content, SCFs@TiO 2 composites showed improved tan δ E values at low frequencies, implying the enhanced microwave attenuation ability at low and medium frequency. We unexpectedly found that the SCFs@TiO 2 composites exhibited very strong absorbing peaks ( i.e. , −46.3 dB) at low frequencies with relatively thin matching thickness. Interestingly, when the thickness of the SCFs@TiO 2 composite was only 1.0 mm, the absorbing bandwidth with a RL value less than −10 dB was over 14.3–16.7 GHz ( i.e. , absorbing frequency bandwidth is 2.4 GHz).
研究领域:
材料科学
·
电磁功能材料
·
纳米复合材料
·
微波吸收材料
✓ 已验证
DOI
高影响因子
ADVANCED ENGINEERING MATERIALS
·
2023
·Vol. 25
·期 13
·2300264
·
IF 3.6
Peng Wu,Wenting He,Yuyi Gao,Jie Xiao,Liangliang Wei,Hongbo Guo
As multifunctional material for microwave absorption and thermal protection, the dielectric and thermophysical properties of equilibrium phases in LSF(La 0.5 Sr 0.5 FeO 3 )–Al 2 O 3 pseudobinary phase diagram are investigated herein. Four pseudobinary composites are obtained by sintering at 1400 °C for 10 h with different raw components ( x wt% LSF-(100− x ) wt% Al 2 O 3 , x = 20, 40, 60 and 80), labeled as LSFA20, LSFA40, LSFA60, and LSFA80, respectively. After sintering, the main equilibrium phase in LSFA20 and LSFA40 composites is SrAl 12 O 19 -based solid solution. For LSFA60 and LSFA80, however, LSF-based and SrAl 12 O 19 -based solid solutions are the main equilibrium phases. The increase of conductive LSF content results in the highest dielectric loss tangent and the best microwave absorbing property in LSFA80, in which the bandwidths for reflection loss less than −10 and −5 dB are about 2.37 and 7.7 GHz, respectively, when the thickness is only 1.5 mm. The thermophysical properties reveal that the thermal conductivity in LSF-Al 2 O 3 pseudobinary composites shows weak temperature dependence because of the opposite contribution between phonons and electrons. It is lower than that of the traditional thermal barrier coating material of 8 wt% Y 2 O 3 -stabilized zirconia (8YSZ).
研究领域:
材料科学
·
微波吸收材料
·
热障涂层
·
陶瓷与复合材料
·
功能材料
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2025
·Vol. 11
·期 8
·2400738
·
IF 5.3
Guodong Han,Song Zhao,Sai Sui,Bo Feng,Yudeng Wang,Junxiang Zhou,Zhuolun Li,Xiaoxia Tian,Yuxiang Jia,Jiafu Wang,Shaobo Qu
Metal–Organic-Frameworks (MOFs) are commonly used as microwave-absorbing materials after pyrolysis treatment. Rare researchers treat MOFs as non-conductive materials and use them as absorbing materials directly. In this paper, MOFs@P-C-800 composite materials are prepared adopt to hydrothermal and ultrasonic dispersion methods by regulating the morphological characteristics of MOFs and the content of P-C-800. As for the Co-BDC-P-C-800, the maximum reflection loss reaches −18.4 dB at 14.29 GHz and the effective absorption bandwidth (EAB) achieves 3.87 GHz from 13.5 to 17.37 GHz. After the contents of P-C-800 is adjusted, the Co-BDC-P-C-800 (0.05 g) exhibited excellent microwave absorption performance, the maximum RL value of −60 dB at 13 GHz with a thickness of 2.0 mm, and the EAB achieves 5.91 GHz from 12.02 to 17.93 GHz. This paper not only provides new application direction for MOFs, but also offers a promising direction for the research and development of absorbing materials.
研究领域:
材料科学
·
微波吸收材料
·
纳米复合材料
·
电磁功能材料
✓ 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）