Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
권호 표지

Oxidation and Magnetic Properties of Iron-nitride Particles in Fluids

  • Lee, Hyo-Sook (Korea Research Institute of Geoscience, Mining and Materials) ;
  • Isao Nakatani (National Research Institute for Materials Science, Tsukuba, Japan)
  • Published : 2002.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

Iron nitride magnetic fluid was oxidized by exposing it to the air under normal atmospheric conditions. After exposure of 3.2 hours, the relative saturation magnetization of the iron nitride magnetic fluid is less than 0.4 compared to the value of the unexposed sample, and it is nearly zero after exposure for 1008 hours. The structure of the oxidized iron nitride is considered to be a non-magnetic hematites. The thickness of the oxidation layers of the iron-nitride particles are nearly the same, about 3 nm, regardless of the different particle sizes.

Keywords

References

  1. I. Nakatani, M. Hijikata and K. Ozawa : J. Magn. MagnMater. 122, 10 (1993) https://doi.org/10.1016/0304-8853(93)91028-6
  2. K. Tagawa, E. Kita and A. Tasaki : Jpn. J. Appl. Phys. 211596 (1982)
  3. X. Bao, R. M. Metzger and W. D. Doyle : J. Appl. Phys.73, 6734 (1993) https://doi.org/10.1063/1.352518
  4. M. Hayashi, I. Tamui-a, Y. Fukano, S. Kanemaki and Y.Fujio : J. Phys. C13, 681 (1980)
  5. M. Hayashi, I. Tamura, Y. Fukano and S. Kanemaki: Surf.Sci. 106, 453 (1981) https://doi.org/10.1016/0039-6028(81)90236-3
  6. M.C.A. Mathur, G.F. Hudson, R.J. Martin, W.A.McKinley and L.D. Hackett: IEEE Trans. Magn. 27, 4675 (1991) https://doi.org/10.1109/20.278913
  7. X. Lin, L. Chen and J. Zhu : Met. Trans. 22A, 2709(1991)
  8. K. Haneda and A.H. Monish : Surf. Sci. 77, 584 (1978) https://doi.org/10.1016/0039-6028(78)90142-5
  9. K. Haneda and A.H. Morrish : Nature, 282, 186 (1979) https://doi.org/10.1038/282186a0
  10. M. Kishimoto, S. Kitahata and M. Amemiya : IEEE Trans.Magn. 22, 732 (1986) https://doi.org/10.1109/TMAG.1986.1064554
  11. S. Suziki, H. Sakumoto, S. Muya and J. Minegish : IEEETrans. Magn. 20, 39 (1984) https://doi.org/10.1109/TMAG.1984.1063017