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Microwave Absorption of γ′-Fe2.6Ni1.4N Nanoparticles Derived from Nitriding Counterpart Precursor

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Abstract:

γ-Fe2.6Ni1.4 nanoparticles were prepared by the arc-discharge method as the precursor and its nitride counterpart of γ′-Fe2.6Ni1.4N nanoparticles was synthesized directly through a thermal ammonolysis reaction at the temperature of 673 K for two hours. The resultant product was identified as a homogeneous ternary nitride with nearly spherical shape and average size of about 60.0 nm. The electromagnetic characteristics of γ′-Fe2.6Ni1.4N derivant and γ-Fe2.6Ni1.4 precursor have been studied in the frequency range of 2–18 GHz. Compared with the precursor, γ′-Fe2.6Ni1.4N nanoparticles exhibits an enhanced electromagnetic absorption property resulted from the increased dielectric loss by nitriding process. The optimal reflection loss (RL) of γ′-Fe2.6Ni1.4N nanoparticles/paraffin composite can reach −39.9 dB at 5.2 GHz in a thickness of 2.29 mm, and the frequency band corresponding RL > −10 dB is over 2.6–18 GHz in the thickness range of 0.78–4.20 mm.

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2012.5842

Publication date: April 1, 2012

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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