Innovative preparation of Co@CuFe2O4 composite via ball-milling assisted chemical precipitation and annealing for glorious electromagnetic wave absorption

Feng, Xiqi; Yin, Pengfei; Zhang, Limin; Sun, Xiaowei; Wang, Jian; Zhao, Liang; Lu, Chong‐Dao; Gao, Zhihua; Zhan, Yongxin

doi:10.1007/s12613-022-2488-2

Cited by 31 publications

(4 citation statements)

References 60 publications

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“…In general, the excellent impedance matching (| Z in / Z 0 |) and strong attenuation constant can achieve an outstanding MA performance. The good impedance matching can allow enough EM waves to enter absorbers and transfer in the MAMs through various routes to consume the microwave energy and reduce its surficial reflectivity . Usually, the value of | Z in / Z 0 | can assess the impedance matching degree of the absorbers .…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, Figure a–d shows the 2D | Z in / Z 0 | maps of Co/C-1/2/3/4 at different thicknesses and frequencies. When the values of | Z in / Z 0 | are within the region of 0.8–1.2, the good impedance matching characteristic can be achieved. , Here, the black line and purple line represent the | Z in / Z 0 | values of 0.8 and 1.2, respectively, and the area between 0.8 and 1.2 is the optimal region for achieving excellent impedance matching. Obviously, the impedance matching of Co/C-1 spans the widest region, indicating that a wider EAB can be obtained at a certain thickness (Figure a).…”

Section: Resultsmentioning

confidence: 99%

“…The good impedance matching can allow enough EM waves to enter absorbers and transfer in the MAMs through various routes to consume the microwave energy and reduce its surficial reflectivity. 43 Usually, the value of |Z in /Z 0 | can assess the impedance matching degree of the absorbers. 44 The |Z in /Z 0 | value is close to 1, and the absorbers have an excellent impedance matching performance.…”

Section: Andmentioning

confidence: 99%

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Co Nanoparticles Embedded in N-Doped Carbon Nanotubes for Broadband Microwave Absorption

Xu,

Liao,

Zhu

et al. 2024

ACS Appl. Nano Mater.

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Herein, an efficient one-dimensional (1D) N-doped Co/C nanotube absorber was designed by a cobalt source and solvent ratio comodulation strategy. First, we explored the influences of different cobalt sources (CoCl 2 , Co(OAc) 2 , Co-(NO 3 ) 2 , and CoSO 4 ) on the morphology and microwave absorption (MA) property, which showed that CoCl 2 facilitated the formation of nanotubes with a relatively uniform diameter and length. Notably, the Co/C nanotubes displayed an ultrawide effective absorption bandwidth (EAB) of 6.885 GHz at 2.2 mm when the filling ratio was only 8 wt %. Then, by adjusting the solvent ratio of isopropanol (IPA) and water, Co/C showed a strong absorption of −44.51 dB with an EAB of 5.44 GHz at 2.35 mm. The outstanding MA performance is ascribed to the synergistic effect of dielectric and magnetic components, which is conducive to optimizing the impedance matching, thus broadening the EAB. In addition, the 1D nanostructure is good for constructing three-dimensional (3D) conductive networks and enhancing conductive loss. Since Co nanoparticles are wrapped in carbon nanotubes (CNTs), the confinement effect can effectively prevent the agglomeration of ferromagnetic nanoparticles, adjusting the MA performance. It is worth mentioning that the maximum Radar cross section (RCS) value of Co/C can be reduced by 28.8 dB m 2 . Furthermore, the RCS values are all lower than −10 dB m 2 from −90 to 90°and the minimum RCS value can reach −46.8 dB m 2 . This work provides a strategy for designing lightweight MA absorbers with strong RL and ultrawide EAB.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Andmentioning

confidence: 99%

See 1 more Smart Citation

Co Nanoparticles Embedded in N-Doped Carbon Nanotubes for Broadband Microwave Absorption

Xu,

Liao,

Zhu

et al. 2024

ACS Appl. Nano Mater.

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“…However, it has potential applications in the field of EMW absorption according to its excellent properties of light weight, high temperature resistance, wear resistance, corrosion resistance, low cost, and easy availability. Inspired by this, Li et al [11] prepared FA@NiFe 2 O 4 EMW absorber by modified sol-gel method using industrial waste FA and nitrate as raw materials. The FA as the core and NiFe 2 O 4 loaded on its outer surface composed its core-shell structure.…”

mentioning

confidence: 99%

Editorial for special issue on electromagnetic wave absorbing materials

Jia

2023

Int J Miner Metall Mater

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Mechanochemistry: Fundamental Principles and Applications

Dong,

Li,

Chen

et al. 2024

Advanced Science

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Mechanochemistry is an emerging research field at the interface of physics, mechanics, materials science, and chemistry. Complementary to traditional activation methods in chemistry, such as heat, electricity, and light, mechanochemistry focuses on the activation of chemical reactions by directly or indirectly applying mechanical forces. It has evolved as a powerful tool for controlling chemical reactions in solid state systems, sensing and responding to stresses in polymer materials, regulating interfacial adhesions, and stimulating biological processes. By combining theoretical approaches, simulations and experimental techniques, researchers have gained intricate insights into the mechanisms underlying mechanochemistry. In this review, the physical chemistry principles underpinning mechanochemistry are elucidated and a comprehensive overview of recent significant achievements in the discovery of mechanically responsive chemical processes is provided, with a particular emphasis on their applications in materials science. Additionally, The perspectives and insights into potential future directions for this exciting research field are offered.

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Innovative preparation of Co@CuFe2O4 composite via ball-milling assisted chemical precipitation and annealing for glorious electromagnetic wave absorption

Cited by 31 publications

References 60 publications

Co Nanoparticles Embedded in N-Doped Carbon Nanotubes for Broadband Microwave Absorption

Co Nanoparticles Embedded in N-Doped Carbon Nanotubes for Broadband Microwave Absorption

Editorial for special issue on electromagnetic wave absorbing materials

Mechanochemistry: Fundamental Principles and Applications

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