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为了研究镜质组富集物的变质程度对泡沫炭孔结构和抗压强度的影响,以气煤、肥煤和焦煤的镜质组富集物为前驱体,采用高压渗氮法制备煤基泡沫炭。利用扫描电子显微镜观察断面形貌,用偏光显微镜统计孔胞直径分布和孔壁厚度分布,采用长春万能材料试验机检测泡沫炭的抗压强度。结果表明:随着镜质组富集物变质程度的提高,泡沫炭的抗压强度增大;气孔率高、孔壁薄、孔壁真密度低,则泡沫炭的抗压强度低。镜质组富集物的胶质层指数和奥亚膨胀度越大,形成泡沫炭孔胞越大,且分布不均匀。镜质组富集物的黏结指数越低及干燥无灰基挥发分越高的镜质组形成的泡沫炭孔壁真密度越低,反之亦然。
In order to study the effect of vitrified enrichment on the carbon foam pore structure and compressive strength, the vitrinite enrichment of gas coal, fat coal and coking coal was used as precursors, and the coal-based Carbon foam. The morphology of cross-section was observed by scanning electron microscopy, the distribution of cell diameter and the distribution of cell wall thickness were measured by polarized microscope, and the compressive strength of foam carbon was tested by the Changchun universal testing machine. The results show that the compressive strength of foam carbon increases with the increase of the deterioration degree of vitrinite enrichment, and the compressive strength of foam carbon is low when the porosity is high, the wall is thin and the true density is low. Vitrinite enrichment of the glial layer index and the greater the degree of ooking, the formation of carbon foam cell larger, and the distribution is not uniform. The lower the bond index of the vitrinite enrichment and the lower the true density of the foam carbon pores formed by the vitrinite with the higher dry ash-free base volatility, and vice versa.