Abstract In this study, a novel and catalyst-free preparation method of SiC nanowires (SiC NWs) was proposed. A slurry prepared by mixing silicon powder with ethyl cellulose and methanol was uniformly coated on a graphite paper, which was then kept in vacuum furnace at different temperature to form SiC NWs. The phases, microstructure and the formation mechanism of SiC NWs was investigated. It was found that the SiC NWs was formed with a vapor-solid process, during which the silicon powder particles were gradually sublimated and reacted with C provided by graphite paper to form 3C-SiC NWs. With increasing holding temperature, high amounts of SiC NWs with a large diameter was obtained, and the micro-morphology of which changed from flocculent into curvilinear, and finally linear nanowires.

中文翻译：

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硅粉在石墨纸上制备碳化硅纳米线

摘要 在这项研究中，提出了一种新型的无催化剂制备 SiC 纳米线（SiC NWs）的方法。将硅粉、乙基纤维素和甲醇混合制备的浆料均匀地涂覆在石墨纸上，然后将其置于真空炉中在不同温度下形成碳化硅纳米线。研究了碳化硅纳米线的物相、微观结构和形成机制。研究发现，SiC NWs是通过气固过程形成的，在此过程中，硅粉颗粒逐渐升华并与石墨纸提供的C反应形成3C-SiC NWs。随着保温温度的升高，获得了大量的大直径 SiC 纳米线，其微观形态从絮状变为曲线状，最后变为线状纳米线。