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探讨以酚醛树脂为前驱物的类玻璃碳,在不同温度炭化处理过程中的微孔变化情况,利用透射电子显微镜中的能量损失谱(EELS)技术,观察其显微结构与化学结构的变化。高分辨电镜观察发现,材料呈现微晶石墨碳层围绕微小孔洞结构排列的无定形结构,孔洞的形成主要是由小分子气化过程中产生的。由EELS图谱中的CK-edge分别对应于1s电子跃迁到π~*和σ~*反键轨道的两个特征峰,可计算得到C原子化学键SP~2杂化程度随炭化温度条件的不同有可观察到的比较明显的变化。
The change of micropore in the carbonization treatment of phenolic resin-based glassy carbon at different temperatures was investigated. The energy loss spectroscopy (EELS) in transmission electron microscopy was used to observe the microstructure and chemical structure changes. High-resolution electron microscopy showed that the material presented an amorphous structure in which the microcrystalline graphite carbon layer was arranged around the micro-hole structure, and the formation of the hole was mainly caused by the small molecule gasification process. From the EELS spectra of CK-edge corresponding to the 1s electronic transition to the π ~ * and σ ~ * anti-orbit two characteristic peaks can be calculated C atom chemical bond SP ~ 2 hybridization degree with the carbonization temperature conditions are different Obvious changes can be observed.