Magnetic and electromagnetic properties of Fe3O4/Fe composites prepared by a simple one-step ball-milling

Cheng, Yan; Li, Yong; Ji, Guangbin; Quan, Bin; Liang, Xiaohui; Zhao, Zixin; Cao, Jian; Du, Youwei

doi:10.1016/j.jallcom.2017.03.060

Cited by 48 publications

(27 citation statements)

References 39 publications

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“…8, almost all experimental points marked by the heart type at the peak frequency of RLmin happen to be at the location matched with the simulated thickness on frequency at n=1 of CFO/3% CNTs, which indicates that the corresponding frequency with RLmin peak mainly originates from the quarter-wavelength cancellation model. The attenuation constant α is usually a response to the overall dissipation characteristics of the materials calculated using the formula below [21]…”

Section: Resultsmentioning

confidence: 99%

High Efficiency Microwave Absorption Performance of Cobalt Ferrite Microspheres/multi-walled Carbon Nanotube Composites

Zhang

et al. 2021

Preprint

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In this article, spinel ferrite CoFe2O4 and multi-walled carbon nanotubes (MWCNTs) composites are constructed by a facile one-step solvothermal method. The pure phase of CoFe2O4 particles is confirmed by X-ray diffraction patterns. Microstructure analysis demonstrates that monodisperse CoFe2O4 microspheres are wound by MWCNTs. By the introduction of CNTs, there is a significant enhancement in the imaginary part of permittivity (ε″) with the composites. The champion microwave absorption performance can be achieved in the composites by the balance of complex permittivity and permeability. When the mass fraction of CNTs is 3%, a minimum reflection loss (RLmin) of the composites is as high as -46.65 dB at 14.4 GHz at a thin thickness of 1.5 mm, and the corresponding effective absorption bandwidth below − 10 dB reaches 4.91 GHz ranging from 12.41 to 17.32 GHz which covers almost the whole Ku band (12.0–18.0 GHz). In other words, this as-synthesized composites show the most outstanding specific RLmin of -31.1 dB•mm− 1. Such superior microwave absorption behaviors of CoFe2O4/CNTs originate mainly from multiple dielectric relaxation processes, enhanced impedance matching and magnetic loss, as well as the considerable interface between mesoporous CoFe2O4 hollow microspheres and CNTs, and thereby promoting microwave reflection and scattering within the samples. Our results indicate that as-fabricated CoFe2O4/CNTs composites can be a promising microwave absorbent integrating with thin thickness, strong absorption ability, and broad bandwidth absorption.

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Section: Resultsmentioning

confidence: 99%

High Efficiency Microwave Absorption Performance of Cobalt Ferrite Microspheres/multi-walled Carbon Nanotube Composites

Zhang

et al. 2021

Preprint

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“…The

ε^{normal′}

of raw Fe 3 O 4 is calculated as 8.5 by Cheng et al . [36]. For obtaining the good performance of absorption, the value of real permittivity should be in moderate value (10–20) [37] and the

ε^{normal′}

of the synthesised sample is in this range.…”

Section: Resultsmentioning

confidence: 99%

“…For obtaining the good performance of absorption, the value of real permittivity should be in moderate value (10–20) [37] and the

ε^{normal′}

of the synthesised sample is in this range. On the other hand, the value of

ε^{normal′ normal′}

for raw Fe 3 O 4 is measured as about 0.5 while its larger value is good for the absorption process [36]. The imaginary permittivity of the nanocomposite is higher than other microwave absorption materials [38, 39].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and evaluation of microwave absorption properties of Fe ₃ O ₄ /Halloysite/polypyrrole nanocomposites

Maleki¹,

Babamoradi²,

Hajizadeh³

et al. 2020

Micro & Nano Letters

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“…The low value of M s . ( 27 − 32 ) is ascribed to the low content of Fe 3 O 4 . As the doping level is relatively low, the density change of the coated proppant could be negligible, but the presence of weak magnetism enables controlled adsorption of the proppant.…”

Section: Results and Discussionmentioning

confidence: 99%

Biomimicry Surface-Coated Proppant with Self-Suspending and Targeted Adsorption Ability

et al. 2020

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Proppant is a key material, which can increase the production of unconventional petroleum and gas. Excellent proppants with a long migration distance are required in the fracture network. Resin-coated proppants have been confirmed as a good choice because of the long migration and the self-suspending ability in fracturing fluids. However, the distribution of the resin-coated proppants in fracture networks is random. The design of proppants with targeted adsorption is urgently needed. In this study, a novel proppant coated with a phenolic resin shell doped with Fe 3 O 4 nanoparticles on ceramic (coated proppant) was designed and investigated. Based on the results, the coated proppant was adsorbed on the magnetic component’s parts of the fracture network surface, which helps in enhancing the uniform distribution of the proppant in the fracture rock cracks. Meanwhile, the self-suspending ability of the coated proppant is five times higher than that of the uncoated proppant and can migrate a longer distance in the fracture network. Moreover, the liquid conductivity of the coated proppant is 30% higher than that of the uncoated ones at a closure pressure of 6.9 MPa. In summary, new insights into the design of functional proppants and further guidelines on the production of unconventional petroleum and gas have been provided in this study.

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Magnetic and electromagnetic properties of Fe3O4/Fe composites prepared by a simple one-step ball-milling

Cited by 48 publications

References 39 publications

High Efficiency Microwave Absorption Performance of Cobalt Ferrite Microspheres/multi-walled Carbon Nanotube Composites

High Efficiency Microwave Absorption Performance of Cobalt Ferrite Microspheres/multi-walled Carbon Nanotube Composites

Synthesis and evaluation of microwave absorption properties of Fe ₃ O ₄ /Halloysite/polypyrrole nanocomposites

Biomimicry Surface-Coated Proppant with Self-Suspending and Targeted Adsorption Ability

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Magnetic and electromagnetic properties of Fe3O4/Fe composites prepared by a simple one-step ball-milling

Cited by 48 publications

References 39 publications

High Efficiency Microwave Absorption Performance of Cobalt Ferrite Microspheres/multi-walled Carbon Nanotube Composites

High Efficiency Microwave Absorption Performance of Cobalt Ferrite Microspheres/multi-walled Carbon Nanotube Composites

Synthesis and evaluation of microwave absorption properties of Fe 3 O 4 /Halloysite/polypyrrole nanocomposites

Biomimicry Surface-Coated Proppant with Self-Suspending and Targeted Adsorption Ability

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Synthesis and evaluation of microwave absorption properties of Fe ₃ O ₄ /Halloysite/polypyrrole nanocomposites