以正硅酸乙酯(TEOS)、聚乙烯基吡咯酮(PVP)为反应前驱体,Fe(NO3)3为催化剂,采用溶胶-凝胶和碳热还原法制得了碳化硅纳米棒.运用XRD、29Si MAS NMR、TEM和SAED等手段对样品的组成和形貌进行了表征.结果表明:产物的形貌为塔状纳米棒,且晶体沿平行于[111]的方向生长;塔形SiC棒的塔底宽约80 nm～100nm,塔层厚度10nm左右,长约0.4μm～1.0μm.在催化剂Fe的作用下,过饱和CO气氛中的动力学控制过程导致了塔状SiC纳米棒的形成.
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