Synthesis and electromagnetic properties of Al/AlOx-coated Ni nanocapsules

Xianguo Liu, Chao Feng, Siu Wing Or, Chuangui Jin, Feng Xiao, Ailin Xia, Weihuo Li, Yuping Sun, Shengsheng Zhao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

30 Citations (Scopus)

Abstract

Ni nanocapsules with a core of Ni nanoparticle and a shell of amorphous Al/AlOxhave been prepared by the arc discharge method. The natural resonance in the Al/AlOx-coated Ni nanocapsules shifts to 6.4 GHz, due to the surface anisotropy of Ni nanoparticles. An optimal RL value of -40.96 dB was observed at 9.2 GHz on a specimen with a matching thickness of 2.40 mm. Theoretical simulation for the microwave absorption using the transmission line theory agrees reasonably well with the experimental results. The frequency of microwave absorption complies with the quarter-wavelength matching model.
Original languageEnglish
Pages (from-to)3887-3891
Number of pages5
JournalMaterials Research Bulletin
Volume48
Issue number10
DOIs
Publication statusPublished - 1 Oct 2013

Keywords

  • A. Composites
  • A. Nanostructures
  • C. X-ray diffraction
  • D. Dielectric properties

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this