Influence of preparation conditions on the pore structure of carbon foam
Influence of preparation conditions on the pore structure of carbon foam
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制备条件对泡沫碳孔结构的影响
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
Wang Yong-Gang
中科院分区：
文献类型：
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作者：
Cao Min;Zhang Shu;Wang Yong-Gang
以石油中间相沥青为原料，在高压高温反应釜中，采用挥发性气体自鼓泡和高压氮气渗透的方法制备了泡沫炭。用扫描电镜和光学显微镜对泡沫炭进行了表征。结果表明，温度和压力是影响泡沫炭结构的重要因素。较高的温度倾向于扩大孔径和增加开孔率的百分比。增加压力会减小孔隙尺寸并提高密度。在高温下可以获得碳层沿着丝的高度规则排列。
A carbon foam was prepared from petroleum mesophase pitch in a high pressure/high temperature reactor by self-bubbling of volatile gas and infiltration of nitrogen at high pressure. The carbon foam was characterized by SEM and light microscopy. It was found that temperature and pressure are important factors in determining the carbon foam structure. Higher temperature tends to enlarge pore size and increase the percentage of open porosity. Increasing pressure decreases pore apertures size and improves density. A highly regular arrangement of carbon layers along the filament can be obtained at high temperature.