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Citation: ZHAO Jun, ZHOU Wei-Liang, XU Fu-Ming. Preparation and Magnetism of Carbon Encapsulated Fe and Ni Nano Particles[J]. Chinese Journal of Applied Chemistry, ;2007, 24(7): 823-827. shu

Preparation and Magnetism of Carbon Encapsulated Fe and Ni Nano Particles

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094

Corresponding author: XU Fu-Ming,
Received Date: 3 August 2006
Available Online: 1 November 2006

Carbon encapsulated Fe and Ni nano particles were respectively prepared by pyrolysis of Fe and Ni-loaded cation exchange resin (Fe-Ni/D113) at 400℃,500℃,600℃ and 700℃.TG results show that the thermal stability of Fe-Ni/D113 was better than that of pure D113 resin.X-ray diffraction (XRD) and transmission electron microscopy (TEM) results show that the nano particle size increased with the pyrolysis temperature.Magnetic test result shows that the pyrolyzate obtained at 400℃ was superparamagnetic.The coercivities (H_c) at room temperature of the pyrolyzates obtained at 500℃,600℃,and 700℃ were much higher than that of the corresponding bulk materials,and the H_c value was influenced by the size of the nano particles.The saturation magnetizations (M_s) of all the pyrolyzates were lower than that of the corresponding bulk materials and increased with the pyrolysis temperature.
- composite material,
- carbon coated nano particle,
- magnetic properties
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