Preparation iron-nickel/graphene heterogeneous composites for enhanced microwave absorption performance via electrochemical exfoliation/deposition technique

High performance, low density and easy preparation are desirable attributes of electromagnetic wave absorption materials. In this study, we prepared graphene flakes containing ellipsoid like magnetic Ni, Fe and NiFe-nano-particles in a one-step electrochemical deposition process. The synthesized nan...

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Bibliographic Details
Published in:Materials chemistry and physics 2021-02, Vol.260, p.124155, Article 124155
Main Authors: Hosseinabadi, Sedigheh, Sheykhifard, Zahra, Mohseni, Majid, Kokabi, Mehrdad, Jamilpanah, Loghman, Hajali, Mohammadreza, Jafari, Mohammad Javad
Format: Article
Language:English
Subjects:
Coercivity
Deposition
Electromagnetic radiation
Electromagnetic shielding
Exfoliation
Graphene
Intermetallic compounds
Iron
Iron compounds
Magnetic saturation
Magnetic shielding
Magnetization
Microwave absorption
Nanocomposite
Nanocomposites
Nanoparticles
Nickel compounds
Superhigh frequencies
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Summary:High performance, low density and easy preparation are desirable attributes of electromagnetic wave absorption materials. In this study, we prepared graphene flakes containing ellipsoid like magnetic Ni, Fe and NiFe-nano-particles in a one-step electrochemical deposition process. The synthesized nanoparticles presenting a superparamagnetic-like response. The saturation magnetization of the Gr/Ni, Gr/Fe, and Gr/NiFe hybrid nanocomposites was 4.4, 371.7, and 546.8 kA/m, respectively, and a coercivity of 1454, 3500, and 2000 A/m, respectively. The total Electromagnetic shielding of these fabricated composites reached 25, 20, and 18.5 dB, in the X band. In the Gr/NiFe nano-composites, the improvement in microwave screening is due to high saturation magnetization and small coercivity of magnetic filler, and higher ac conductivity. [Display omitted] •Preparation graphene flakes containing ellipsoids like magnetic Ni, Fe, and NiFe-nano-particles in a one-step electrochemical deposition process.•Considering to the percolation threshold of the synthesized nanoparticles in preparing the electromagnetic absorber to avoid the reflection of the waves.•Electromagnetic shielding capability of the embedded Fe and Ni-nanoparticles structures via trapping of the waves via multiple internal scattering.•The enhanced nanocomposite with great potential applications as a microwave absorber in hiding technology.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2020.124155