Synthesis of Fe-filled carbon nanocapsules by an electric plasma discharge in an ultrasonic cavitation field of liquid ethanol

Ruslan Sergiienko, Etsuro Shibata, Zentaro Akase, Hiroyuki Suwa, Daisuke Shindo, Takashi Nakamura

研究成果: Article査読

15 被引用数 (Scopus)

抄録

Nanoparticles of iron carbides (Fe3C and X-Fe2.5C) wrapped in multilayered graphitic sheets were synthesized by a developed method in which an electric plasma was generated in an ultrasonic cavitation field containing thousands of tiny activated bubbles in liquid ethanol. Annealing changed the phase composition, structure, and size of the carbon nanocapsules as most of the iron carbides decomposed into the α-Fe phase and graphite. Powder samples annealed at 873 and 973 K have maximal saturation magnetization values equal to 80.6 and 83.4 A m2/kg, respectively, which is approximately 40% of the value of bulk iron. Using this method, it will be possible to synthesize nanoparticles of a metal of choice encapsulated by graphite shells by selecting appropriate materials for the ultrasonic tip and electrodes.

本文言語English
ページ(範囲)2524-2533
ページ数10
ジャーナルJournal of Materials Research
21
10
DOI
出版ステータスPublished - 2006 10 1

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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