Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2012-04-01

Journal: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY

Included Journals: Scopus、PubMed、EI、SCIE

Volume: 12

Issue: 4

Page Number: 3040-3047

ISSN: 1533-4880

Key Words: Nitride Nanoparticles; Arc Discharge; Permittivity; Permeability; Microwave Absorption

Abstract: gamma-Fe2.6Ni1.4 nanoparticles were prepared by the arc-discharge method as the precursor and its nitride counterpart of gamma'-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 gamma'-Fe2.6Ni1.4N derivant and gamma-Fe2.6Ni1.4 precursor have been studied in the frequency range of 2-18 GHz. Compared with the precursor, gamma'-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 gamma'-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.