Preparation, Characterization and Application in Electromagnetic Wave Absorption of Core-Shell C/Fe3O4 Nanocomposites

Abstract:

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Large-quantity core-shell carbon spheres/Fe3O4 nanocomposites were synthesized via a simple solution method. The phase structures and morphologies of the composite had been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that the carbon spheres were covered by a layer of Fe3O4 nanoparticles with a diameter of about 25 nm. Measurements of the electromagnetic parameters of the samples showed that microwave absorption properties of the carbon sphere-Fe3O4 nanocomposites were much better than that of the pure Fe3O4 or the mixtures of carbon spheres and Fe3O4 microspheres. The optimal reflection loss (RL) reached −37.8 dB at 14.8 GHz for a layer thickness of 2.0 mm, which is favorable for application of our samples in a wide frequency range.

Info:

Periodical:

Advanced Materials Research (Volumes 239-242)

Edited by:

Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He

Pages:

1725-1730

DOI:

10.4028/www.scientific.net/AMR.239-242.1725

Citation:

Q. C. Liu et al., "Preparation, Characterization and Application in Electromagnetic Wave Absorption of Core-Shell C/Fe3O4 Nanocomposites", Advanced Materials Research, Vols. 239-242, pp. 1725-1730, 2011

Online since:

May 2011

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Price:

$35.00

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