碳弧法中碳包Fe纳米晶及其相关碳微团的形成

无机材料学报

碳弧法中碳包Fe纳米晶及其相关碳微团的形成

张海燕¹; 何艳阳¹; 薛新民³; 成晓玲³; 彭少麒²

1. 广东工业大学数理系; 广州市 510090; 2. 中山大学物理系; 广州市 510275; 3. 广东工业大学实验研究中心广州市 510090

收稿日期:1998-05-15 修回日期:1998-07-02 出版日期:1999-04-20 网络出版日期:1999-04-20

Formations of Carbon-coated Fe Nanocrystals and Related Carbon Cluster

ZHANG Hat-Yan¹; HE Yan-Yang¹; XUE Xin-Min³; CHENG Xiao-Ling³; PENG Shao-Qi²

1. Dept.of Mathematics and Physics; Guangdong University of Technology Guanyzhou 510090 China; 2.Dept. of physice; Zhongshan University Guangzhou 510275 China; 3.Experiment and Research Center, Guangdong University of Technology Guangzhou 510090 China

Received:1998-05-15 Revised:1998-07-02 Published:1999-04-20 Online:1999-04-20

摘要/Abstract

摘要： 用直流碳弧法在阳极石墨棒中加入α－Fe₂O₃产生碳包Fe纳米晶，研究在复合石墨棒中加入不同的Fe₂O₃含量对碳包Fe纳米晶的形貌、结构特性及晶粒尺寸分布的影响，探讨碳包Fe纳米晶的形成原因及碳弧法中氦气压力和Fe₂O₃含量对复合石墨棒所产生的碳灰的C_60／70产率的影响．结果表明：Fe₂O₃复合石墨棒所产生的碳灰含有α－Fe相、Fe₃C相和石墨相，没有氧化物相．复合阳极棒中的Fe₂O₃含量决定了碳包Fe纳米晶的数量和晶粒直径分布，碳弧法中的He气压力仍是影响掺Fe₂O₃阳极棒所产生的碳灰的C_60／70产率的主要因素，但对碳包Fe纳米晶的产率影响不大.掺Fe₂O₃阳极棒所产碳灰的C_60／70产率与氦气压力的关系和纯石墨阳极棒的这一关系比较，存在着显著的差别．

关键词: 碳包铁（Fe）纳米晶, 碳弧法, C_60/70

Abstract: Carbon-coated Fe nanocrystals were produced by d.c. carbon arc method by using a composite anode of Fe₂O₃ and graphite. The investigations for the
effect of different Fe₂O₃ contents in the composite graphite rods on the morphology, structures and diameter distribution of graphite-encapsulated Fe nanocrystals were
carried out. X-ray diffraction of the carbon soot produced from Fe₂O₃-containing composite anode indicated the presence of graphite phase and α-Fe, no evidence of
Fe oxides was observed, but a small amount of Fe₃C found. The effect of He pressure and Fe₂O₃ content on the C_60/70 yield of the carbon soot produced from
composite rods was also discussed. The results show that the quantity and the diameter distribution of carbon-coated Fe nanocrystals are determined by the Fe₂O₃ content in
the composite anode rod. He pressures are the major factor of affecting C_60/70 yield produced from Fe₂O₃ composite anode, but not the major factor of affecting the yields
of carbon-coated Fe nanocrystals. The relationship of C_60/70 yields in the carbon soot produced from Fe₂O₃ composite anode and He pessure is markedly different from that
of pure graphite anode.

Key words: carbon-coated Fe nanocrystals, carbon arc method, C_60/70

中图分类号:

TF123

张海燕,何艳阳,薛新民,成晓玲,彭少麒. 碳弧法中碳包Fe纳米晶及其相关碳微团的形成[J]. 无机材料学报.

ZHANG Hat-Yan,HE Yan-Yang,XUE Xin-Min,CHENG Xiao-Ling,PENG Shao-Qi. Formations of Carbon-coated Fe Nanocrystals and Related Carbon Cluster[J]. Journal of Inorganic Materials.

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