用自制的酚醛树脂热解炭作炭源，用ＳｉＯ２超细粉作硅源，根据碳热还原原理，利用常规加热和微波加热两种方式，分别制备了直径在纳米级的ＳｉＣ晶须。Ｘ射线衍射、透射电镜检测结果表明：制备工艺和条件对ＳｉＣ晶须的性质有较大的影响。 Using self-made phenolic resin pyrolysis carbon as carbon source, using SiO2 ultrafine powder as silicon source, according to the principle of carbothermal reduction, two types of SiC whiskers with diameters of nanometer were prepared respectively by conventional heating and microwave heating. The results of X-ray diffraction and transmission electron microscopy show that the preparation process and conditions have a great influence on the properties of SiC whiskers.