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碳包裹納米Co粒子的制備及其磁性
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Preparation and Magnetism Study of Carbon Coated Nano Co Particles
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    摘要:

    采用離子交換樹脂(D113)經(jīng)過與Co二價離子交換后形成含金屬的前驅(qū)體(Co/D113)，經(jīng)熱解制備碳包裹納米Co粒子。TG分析表明，Co/D113的熱穩(wěn)定性要強(qiáng)于D113。XRD、TEM結(jié)果表明，在400~700 ℃熱解Co/D113可獲得碳包裹面心立方結(jié)構(gòu)(fcc)的納米Co粒子，而且納米Co粒子的粒徑隨熱解溫度的升高而增大。室溫磁性能測試結(jié)果表明，400~700 ℃熱解產(chǎn)物的矯頑力Hc均遠(yuǎn)大于相應(yīng)的塊體材料，并與產(chǎn)物中納米Co粒子的尺寸有關(guān)；所有熱解產(chǎn)物的比飽和磁化強(qiáng)度Ms小于相應(yīng)的塊體材料，并隨其中納米Co粒子尺寸的增大而增加

    Abstract:

    Carbon coated nano Co particles were prepared by pyrolysis of Co-exchanged resin (Co/D113) at 400 to 700 ℃. The TG results show that the thermal stability of Co/D113 is better than that of pure D113 resin. The XRD and TEM results reveal that the cobalt particles existed mainly in the form of fcc Co phase, and the particle size of nano-Co increase with the increase of pyrolytic temperature. The magnetic tests show that the coercivity(Hc) of the pyrolyzates obtained at 400 to 700 ℃ at room temperature are much higher than that of the corresponding bulk material, and the Hc value is influenced by the size of the nano particles. The saturation magnetizations (Ms) of all the pyrolyzates are lower than that of bulk material and increase with the increase of pyrolytic temperature

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趙 軍,肖樂勤,李 煜,周偉良,徐復(fù)銘.碳包裹納米Co粒子的制備及其磁性[J].稀有金屬材料與工程,2009,38(9):1646~1649.[Zhao Jun, Xiao Leqin, Li Yu, Zhou Weiliang, Xu Fuming. Preparation and Magnetism Study of Carbon Coated Nano Co Particles[J]. Rare Metal Materials and Engineering,2009,38(9):1646~1649.]
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  • 收稿日期:2008-10-11
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