After purification,sensitization, activation of multi-wall carbon nanotubes( CNTs),Ni-coated CNTs
were produced by electroless plating. By DSC analysis,suitable heat treatment temperature is excavated,then Ni-coated
CNTs were annealed under inert gas atmosphere. The products were characterized by transmission electron microscopy
(TEM),energy chromatog raphy (EDS),X-ray diffraction (XRD). The results show that CNTs surface is successfully
coated with a layer of nickel-phosphorus alloys,and Ni-coated CNTs after heat treatment is smoother and
crystallization reaction is occurred, thereby electromagnetic performance is greatly enhanced. The test of electrical
properties show that the conductivity of Ni-coated CNTs is 450 S/ m, and is improved to 1 400 S/ m after the heat
treatment. The test of magnetic properties show Ni-coated CNTs before and after the heat treatment are soft magnetic
material, the saturation magnetization is 2. 753 emu/ g before the heat treatment,and is improved to 11. 254 emu/ g after
the heat treatment.