引用本文:
赵军, 周伟良, 徐复铭. 碳包裹纳米(Fe,Ni)粒子的制备与磁性[J]. 应用化学,
2007, 24(7): 823-827.
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.
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.
碳包裹纳米(Fe,Ni)粒子的制备与磁性
摘要:
采用D113离子交换树脂与Ni2+、Fe2+交换后形成含金属的Fe-Ni/D113前驱体,经热解制备碳包裹纳米FeNi合金粒子。TG分析表明,Fe-Ni/D113的热稳定性要强于D113。XRD、TEM测试结果表明,在400、500、600和700℃热解Fe-Ni/D113均可获得碳包裹纳米FeNi合金粒子,而且纳米FeNi合金粒子的粒径随热解温度的升高而增大。室温磁性能测试结果表明,400℃热解产物具有超顺磁特性,500、600和700℃热解产物的矫顽力Hc均远大于相应的块体金属,并与产物中纳米FeNi合金粒子的尺寸有关;所有热解产物比饱和磁化强度Ms小于相应的块体材料,并随其中纳米合金粒子尺寸的增大而增加。
English
Preparation and Magnetism of Carbon Encapsulated Fe and Ni Nano Particles
Abstract:
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 (Hc) at room temperature of the pyrolyzates obtained at 500℃,600℃,and 700℃ were much higher than that of the corresponding bulk materials,and the Hc value was influenced by the size of the nano particles.The saturation magnetizations (Ms) of all the pyrolyzates were lower than that of the corresponding bulk materials and increased with the pyrolysis temperature.
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Key words:
- composite material
- / carbon coated nano particle
- / magnetic properties
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