Dispersion of iron nano-particles on expanded graphite for the shielding of electromagnetic radiation

Xu, Zheng; Huang, Yuan; Yang, Yang; Shen, Jianyi; Tang, Tao; Huang, Runsheng

doi:10.1016/j.jmmm.2010.05.034

Cited by 14 publications

(1 citation statement)

References 14 publications

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“…Electromagnetic shielding materials that absorb and reflect electromagnetic waves can reduce these hazards (Kim et al 2005;Xu et al 2010). Among them, wood-based electromagnetic shielding composites have become a trend in this type of composite because of their desirable properties, such as reproducibility, natural degradability, and natural aesthetics.…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic Shielding Performance of Nickel Plated Expanded Graphite/Wood Fiber Composite

Chen

Yuan

et al. 2016

BioResources

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To develop a wood-based electromagnetic shielding composite, in-situ electroless plating was used to plate nickel onto the surface of expanded graphite (EG) to obtain nickel-plated EG (Ni-EG), and the Ni-EG was mixed with wood fiber to manufacture the composite. The optimal plating formula was as follows: 20 g/L NiSO4·6H2O as the main salt, 60 g/L N2H4·H2O as the reducing agent, 50 g/L Na3C6H5O7·2H2O as the complexing agent, 40 g/L CH3COONa·H2O as the buffering agent, pH value 11, and a temperature of 90 °C. These conditions yielded the highest quality of nickel coating (3.57 g). As EG concentration increased from 2 to 10 g/L, the percentage of the Ni-EG in the composite was 60%, the thickness of the composite was 2 mm, the density was 0.9 g/cm 3 , the magnetic properties and resistivity of the Ni-EG decreased from 29.5 to 5.57 emu/g and 80.2 to 10.7 mΩ·cm, respectively, and the electromagnetic shielding effectiveness (SE) and the reflectivity of the composite increased from 55 to 60 dB and −3.6 to -1.8 dB, respectively. Consequently, the introduction of nickel is suitable for improving the absorbing performance of Ni-EG/wood fiber composites, leading to better SE in a broad frequency range.

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Section: Introductionmentioning

confidence: 99%

Electromagnetic Shielding Performance of Nickel Plated Expanded Graphite/Wood Fiber Composite

Chen

Yuan

et al. 2016

BioResources

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The Influence of Filler Shape on the Microwave Absorptions of Polyethylene Composites with High Ferroalloy Powder Content

Li,

Cheng

et al. 2024

Adv Eng Mater

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The ferroalloy powder (FeP) with remarkably high‐magnetic permeability and high‐temperature stability has attracted much attention for its potential application in the field of radar stealth. However, achieving high stealth performance in different frequency bands by controlling the shape of iron alloys remains a major challenge. Herein, FeP‐filled high‐density polyethylene composites with different FeP shapes by hot pressing are prepared. This work employs a straightforward vacuum hot‐pressing molding technique to analyze the electromagnetic wave absorption property of composite materials utilizing two distinct forms of FeP as different fillers. It is noted that composites filled with 75 wt% spherical FeP with excellent impedance matching exhibit a minimum reflection loss (RLmin) of −60.75 dB at 12.23 GHz with a thickness of 2.55 mm, and a maximum effective absorption bandwidth of 8.31 GHz at 2.5 mm. While high‐density polyethylene composites filled with 75 wt% flaky FeP obtain the RLmin value at a low frequency of 2 GHz because of the high magnetic loss. This work provides a guideline for developing applications of FeP‐filled composites with different shapes.

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Synthesis and characterization of structural and magnetic properties of graphene/hard ferrite nanocomposites as microwave-absorbing material

2014

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Dispersion of iron nano-particles on expanded graphite for the shielding of electromagnetic radiation

Cited by 14 publications

References 14 publications

Electromagnetic Shielding Performance of Nickel Plated Expanded Graphite/Wood Fiber Composite

Electromagnetic Shielding Performance of Nickel Plated Expanded Graphite/Wood Fiber Composite

The Influence of Filler Shape on the Microwave Absorptions of Polyethylene Composites with High Ferroalloy Powder Content

Synthesis and characterization of structural and magnetic properties of graphene/hard ferrite nanocomposites as microwave-absorbing material

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