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首页> 外文期刊>IEEE Transactions on Magnetics >The preparation of Co/Fe alloy fine particles from HFeCo/sub 3/(CO)/sub 12/
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The preparation of Co/Fe alloy fine particles from HFeCo/sub 3/(CO)/sub 12/

机译：由HFeCo / sub 3 /（CO）/ sub 12 /制备Co / Fe合金细颗粒

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摘要

The preparation and properties of magnetic fluids containing fine particles of Co/Fe 'alloys' are reported. The alloy nature of single particles has been confirmed by local area energy-dispersive X-ray analysis at very high spatial resolution in transmission electron microscopy. These particles have been prepared by the decomposition of a mixed-metal organometallic precursor, HFeCo/sub 3/(CO)/sub 12/, in the presence of surfactants. Two principal compositions have been observed, one of 3:1 Co:Fe as in the precursor molecule and another of 8:1 Co:Fe. Electron microscopy has also revealed mean particle diameters in the range 6-8 nm and narrow size distributions. In the case of one fluid, the proportion of metal atoms in the precursor converted to metal in the ferromagnetic state is estimated to be approximately 84% before oxidation. The kinetics of the decomposition show differences in detail compared to those of Co/sub 4/(CO)/sub 12/.
机译：报道了含有Co / Fe“合金”细颗粒的磁性流体的制备和性能。通过在透射电子显微镜中以非常高的空间分辨率进行的局部能量色散X射线分析已证实了单颗粒的合金性质。这些颗粒是通过在表面活性剂存在下分解混合金属有机金属前体HFeCo / sub 3 /（CO）/ sub 12 /而制备的。已经观察到两种主要成分，一种在前体分子中为3：1 Co：Fe，另一种为8：1 Co：Fe。电子显微镜还发现平均粒径在6-8 nm范围内，粒径分布较窄。在一种流体的情况下，在氧化之前，前体中的金属原子在铁磁状态下转化为金属的比例估计约为84％。与Co / sub 4 /（CO）/ sub 12 /相比，分解动力学显示出详细的差异。

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