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Study on the synthesis ofε-Fe3N-based magnetic fluid

Authors
Journal
Journal of Magnetism and Magnetic Materials
0304-8853
Publisher
Elsevier
Publication Date
Volume
307
Issue
2
Identifiers
DOI: 10.1016/j.jmmm.2006.03.067
Keywords
  • Magnetic Fluids
  • Iron Nitride
  • Saturation Magnetization
  • Nano-Material
  • Functional Material
Disciplines
  • Chemistry

Abstract

Abstract In this work, stable high-saturation magnetization ε-Fe 3N magnetic fluid was synthesized successfully by the chemical reaction of iron carbonyl (Fe(CO) 5) and ammonia gas (NH 3). The experiment results have shown that the reactive conditions, such as the nitriding temperature, the gas flux ratio of Ar1:Ar2:NH 3, the reactive time, the content of surfactant and the hole size of the porous plate used, have important effects on the phase composition, the size of magnetic particles, the magnetic properties and the stability of ε-Fe 3N magnetic fluid. Also it was found that the synthetic time of stable high saturation magnetization ε-Fe 3N magnetic fluid could be shortened by adding n-heptane into the carrier, and the size of ε-Fe 3N magnetic particles could be decreased by decreasing the pore size of the porous plate used in our experiment. Finally, stable ε-Fe 3N magnetic fluid with the saturation magnetization 1663 Gs and the mean particle size 12 nm was synthesized successfully.

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