以酚醛树脂(PF)作为碳源,纳米SiO2为硅源,在1300℃氩气气氛下通过碳热还原反应,制备出具.有核壳结构的SiC/SiO2纳米线.采用X射线分析衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、高分辨率透射电子显微镜(HRTEM)、拉曼光谱(Raman)对产物的组成、形貌、微观结构等进行了表征.结果表明；SiC/SiO2纳米线长可达数毫米,单根SiC/SiO2纳米线由直径30 nm的β-siC晶体为内核和厚度约12 nm的无定形SiO2壳层组成；室温下SiC/SiO2纳米线的PL发光峰与β-SiC单晶的发光特征峰相比有蓝移.最后,讨论了核壳结构SiC/SiO2纳米线的生成机制.
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