Molten salt corrosion of graphite as a possible way to make carbon nanostructures
Molten salt corrosion of graphite as a possible way to make carbon nanostructures
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DOI：
10.1016/j.carbon.2012.12.076
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发表时间：
2013-05
期刊：
影响因子：
10.9
通讯作者：
A. Kamali;D. Fray
中科院分区：
文献类型：
--
作者：
A. Kamali;D. Fray
通过热分析、X 射线衍射、拉曼散射和显微镜研究了将合成多晶石墨和氯化锂的混合物加热至 1250°C 时石墨发生的结构和微观结构变化。发现热处理后石墨的平均晶粒尺寸显着增加。尽管石墨的氧化在很大程度上受到抑制，但仍观察到石墨受到不同形式的腐蚀。因此，这些导致形成不同的微观结构，包括剥离的碳片和纳米片、凹坑颗粒和碳纳米棒。讨论了与微观结构变化相关的可能机制。还研究了加热速率对石墨粉在空气中氧化的影响。
The structural and microstructural changes in graphite occurring by heating a mixture of synthetic polycrystalline graphite and lithium chloride to 1250°C are studied by thermal analysis, X-ray diffraction, Raman scattering and microscopy. The average crystallite size of the graphite was found to increase significantly after the heat treatment. Although the oxidation of graphite was largely inhibited, different forms of corrosion attack on the graphite were observed. Consequently, these led to the formation of different microstructures comprising exfoliated carbon sheets and nanosheets, pitted particles and carbon nanorods. The possible mechanisms related to the microstructural changes are discussed. The effect of heating rate on the oxidation in air of graphite powder is also investigated.