Prepared and Microwave-Absorption Properties of BN Coated Ni Nanocapsules

Gui Mei Shi; Shu Lian; Ge Song; Jin Bing Zhang

doi:10.4028/www.scientific.net/MSF.663-665.1252

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HomeMaterials Science ForumMaterials Science Forum Vols. 663-665Prepared and Microwave-Absorption Properties of BN...

Prepared and Microwave-Absorption Properties of BN Coated Ni Nanocapsules

Abstract:

BN coated Ni nanocapsules were prepared by arc evaporating Ni-B amorphous alloy powders synthesized by a mechanochemical reaction, and their microstructure, surface component as well as electromagnetic properties (2-18 GHz) were investigated by means of high-resolution transmission electron microscopy, X-ray diffraction , photoluminescence spectra (PL) and a network analyzer, respectively. The reflection loss R (dB) of the nanocapsules less than -20 dB was obtained in the frequency range of 4.3-18 GHz for an absorber thickness of 1.4-6 mm. An optimal reflection loss of -32.0 dB was reached at 13 GHz with an absorber thickness of 2 mm. The microwave absorptive mechanisms of BN-coated Ni nanocapsule absorbent were discussed.

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Materials Science Forum (Volumes 663-665)

Pages:

1252-1255

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.663-665.1252

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Online since:

November 2010

Authors:

Gui Mei Shi, Shu Lian, Ge Song, Jin Bing Zhang

Keywords:

Core-Shell Structure, Microwave-Absorption Material, Nanocapsule, Photoluminescence Spectra, Plasma Arc Discharge

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