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

作者：Azizi A; Sadrnezhaad S K^*; Hasani A

来源：Journal of Magnetism and Magnetic Materials, 2010, 322(21): 3551-3554.

DOI：10.1016/j.jmmm.2010.07.004

• Fe(0.67)Co(0.33)
• Mechanochemical
• Nanocrystalline particle
• Salt-matrix hydrogen reduction
• Magnetic property

Properties of FeCo nanocrystalline intermetallic powders prepared by salt-matrix hydrogen reduction of a milled Fe(2)O(3)Co(3)O(4) mixture were investigated. The product of 72 ks ball-milling at 350 rpm was CoFe(2)O(4) nanopowder. Reduction of this powder for 3.6 ks by hydrogen at 750 degrees C resulted in the formation of Fe(0.67)Co(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.

• 出版日期2010-11