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采用化学镀制备镀镍纳米石墨微片(Ni-nanoG),对其进行制备工艺研究及结构表征,旨在得到一种新型导电导磁填料。讨论了硫酸镍浓度、次亚磷酸钠浓度、温度、pH值对石墨微片镀层的影响,得出镀镍的最佳工艺。采用SEM、XRD、EDS对其结构进行了表征,并用振动样品磁强计(VSM)测试了其磁性能。结果表明:纳米石墨微片(nanoG)表面镀上了一层紧凑的金属镍。镍均匀分布在nanoG的表面和边界面上,将nanoG包覆得较严实。Ni-nanoG厚度约为150nm。nanoG上镍的含量较高,其质量分数大约为34.08%。Ni-nanoG的饱和磁化强度为71.2A.m2.kg-1,可以作为吸波隐身材料的新型功能型填料。
Nickel-plated nano-graphite micro-tablets (Ni-nanoG) were prepared by electroless plating, and their preparation process and structural characterization were studied. The effects of nickel sulfate concentration, sodium hypophosphite concentration, temperature and pH value on the graphite microchips plating were discussed. The best technology of nickel plating was obtained. Its structure was characterized by SEM, XRD and EDS. Its magnetic properties were tested by vibrating sample magnetometer (VSM). The results show that the surface of nanoG graphite is coated with a compact layer of nickel metal. Nickel is uniformly distributed on the surface and boundary of the nanoG, covering the nanoG more tightly. Ni-nanoG thickness of about 150nm. The content of nickel on nanoG is higher, its mass fraction is about 34.08%. The saturation magnetization of Ni-nanoG is 71.2A.m2.kg-1, which can be used as a novel functional filler for absorbing stealth material.