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在水/司班-80/正丁醇/正庚烷组成的微乳液系统中,用KBH4还原相应的金属离子成功地制备了Fe-Co-Ni合金纳米质点.Fe-Co-Ni合金和复合物纳米微粒的晶体结构、相变性质用X射线衍射(XRD)、热重分析(TG)和示差扫描量热仪(DSC)作了考察.过程参数对合金和复合物组成、相变以及形态特征的影响用透射电子显微镜(TEM)、X射线能量散射谱(EDS)、原子力显微镜(AFM)和电子衍射(ED)进行了分析,结果表明Fe-Co-Ni的合金化将形成三元金属复合物纳米结构.合金的磁性质用环形AC磁场作了研究.结果表明,Fe-Co-Ni合金和三元金属复合物纳米质点当其在150～400℃退火后,呈现松针和山丘状,其长度和直径分别为150 nm和20～30 nm.磁感应性随煅烧温度的增加而降低;在所有的热分析实验中检测到几个放热过程对应于无定形合金的晶化.对形成Fe-Co-Ni合金和金属复合物的可能机理作了讨论.
The Fe-Co-Ni alloy nanomaterials were successfully prepared by the reduction of the corresponding metal ions with KBH4 in a microemulsion system consisting of water / divan-80 / n-butanol / n-heptane. XRD, TG and DSC were used to investigate the crystal structure and phase transition properties of the nanocomposites.Process parameters of the alloy and the composition, phase transition and morphology The influence of the characteristics was analyzed by transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscopy (AFM) and electron diffraction (ED). The results show that the alloying of Fe-Co-Ni will form a ternary metal Composite nanostructures.The magnetic properties of the alloy were investigated by using a ring-shaped AC magnetic field.The results show that when annealed at 150-400 ℃, the Fe-Co-Ni alloy and the ternary metal composite nano-particles exhibit pine needles and hills , The length and diameter of which are 150 nm and 20 ~ 30 nm, respectively.Magnetic induction decreases with increasing calcination temperature, and in all the thermal analysis experiments several exothermic processes have been observed to correspond to the crystallization of amorphous alloys. Possible mechanisms of Fe-Co-Ni alloys and metal composites are discussed.