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Morphology and magnetic properties of FeCo nanocrystalline powder produced by modified mechanochemical procedure

Azizi, A ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jmmm.2010.07.004
  3. Publisher: 2010
  4. Abstract:
  5. Properties of FeCo nanocrystalline intermetallic powders prepared by salt-matrix hydrogen reduction of a milled Fe 2O 3-Co 3O 4 mixture were investigated. The product of 72 ks ball-milling at 350 rpm was CoFe 2O 4 nanopowder. Reduction of this powder for 3.6 ks by hydrogen at 750 °C resulted in the formation of Fe 0.67Co 0.33 stoichiometric compound. Scanning electron microscopy, electron dispersive spectrometry, X-ray diffraction and vibrating sample magnetometry were used to characterize the nanopowder. Using a salt-matrix (NaCl as a dispersion medium) resulted in the decrease of the reduction temperature and improvement of the morphology and magnetic properties of the nanopowder. Dispersion of the ball-milled product in Hexan resulted in further improvements of the magnetic properties
  6. Keywords:
  7. Fe 0.67Co 0.33 ; Magnetic property ; Salt-matrix hydrogen reduction ; Hydrogen reduction ; matrix ; Mechanochemical ; Mechanochemicals ; Nanocrystalline particle ; Ball milling ; Dispersions ; Hydrogen ; Magnetic materials ; Magnetic properties ; Magnetism ; Morphology ; Nanostructured materials ; Scanning electron microscopy ; Sodium chloride ; X ray diffraction ; Nanocrystalline powders
  8. Source: Journal of Magnetism and Magnetic Materials ; Volume 322, Issue 21 , 2010 , Pages 3551-3554 ; 03048853 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0304885310004683