二氧化硅/生物质碳复合材料是溶胶-凝胶/碳热还原法制备生物质多孔碳化硅陶瓷的关键.以尺寸为60mm×18mm×5mm的松木为原材料,在105℃下干燥24h,在不同真空/加压条件下浸渍二氧化硅溶胶,经过干燥和循环浸渍在松木孔道中填充二氧化硅凝胶,将二氧化硅凝胶/松木复合材料在500 ℃氮气气氛下碳化2h,制备出二氧化硅/生物质碳复合材料.采用扫描电子显微镜(SEM)、傅立叶变换红外光谱(FT-IR)、X射线衍射(XRD)对二氧化硅/生物质碳复合材料的形貌和结构进行表征,详细研究了浸渍压力和循环次数对二氧化硅/生物质碳复合材料结构的影响.
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