期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 307, 期 2, 页码 198-204出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2006.03.067
关键词
magnetic fluids; iron nitride; saturation magnetization; nano-material; functional material
In this work, stable high-saturation magnetization epsilon-Fe3N magnetic fluid was synthesized successfully by the chemical reaction of iron carbonyl (Fe(CO)(5)) and ammonia gas (NH3). The experiment results have shown that the reactive conditions, such as the nitriding temperature, the gas flux ratio of Ar1:Ar2:NH3, 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 epsilon-Fe3N magnetic fluid. Also it was found that the synthetic time of stable high saturation magnetization epsilon-Fe3N magnetic fluid could be shortened by adding n-heptane into the carrier, and the size of epsilon-Fe3N magnetic particles could be decreased by decreasing the pore size of the porous plate used in our experiment. Finally, stable epsilon-Fe3N magnetic fluid with the saturation magnetization 1663 Gs and the mean particle size 12 run was synthesized successfully. (c) 2006 Elsevier B.V. All rights reserved.
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