石墨镶嵌Co纳米晶的形成及其特性

用直流碳弧法在阳极石墨棒中加入金属Ｃｏ产生石墨镶嵌Ｃｏ纳米晶，研究在复合石墨棒中加入不同的Ｃｏ含量对石墨镶嵌Ｃｏ纳米晶的形貌、结构特性及晶粒尺寸分布的影响，探讨石墨镶嵌Ｃｏ纳米晶的形成原因及碳弧法中氦气压力和Ｃｏ含量对掺Ｃｏ阳极石墨棒所产生的碳灰的Ｃ６０／７０产率的影响。结果表明，复合阳极棒中的Ｃｏ含量决定了石墨镶嵌Ｃｏ纳米晶的数量和晶凿直径分布，碳弧法中的Ｈｅ气压力仍是影响掺Ｃｏ阳极棒所产生的碳

The Formation and Properties of Graphite-Encapsulated Co Nanocrystals

Graphhite-encapsulated Co nanocrystals were produced by d. c. carbon arc method using a composite of Co and graphite. Wehave investigated the effect of different Co contents i the composite graphite rods on the morphology,structures,formation process anddiameter distrbution of graphite-encapsulated Co nanocrystals. The effect of He presure and Co content on the C60/70 yield of the carbonsoot produced form composed rods were also discussed. The results showed that the quantity and the diameter distribution of graphiteencapsulated Co nanocrystals were decided by Co content in the composite anode rod. He pressures remain to be the major factor ofaffecting C60/70 yield produced form Co composite anode, but not the major factor of affeiting the yields of graphite-encapsulated Conanocrystals. The -relationship of C60/70 yiedle of carbon soot produced born Co composite anode and He pressure is markedly differentfrom that of pure graphite anode.