Synthesis of silicon oxide nanofibers by sublimation of SiC in medium vacuum with oxygen flow

Silicon carbide (SiC) particles with/without cobalt (Co) powder as catalyst were heated on a carbon (C) boat at temperatures ranging from 1,300 to 1,5 50 degrees C for 10 min in medium vacuum with low oxygen (O-2) flow rate. A large quantity of fiberlike products was found on the SIC particles. The p roducts were observed using a high-resolution scanning electron microscope (HR-SEM) and a high-resolution transmission electron microscope (HR-TEM). T heir compositions were also analyzed by electron diffraction analysis, ener gy dispersive X-ray spectroscopy (EDX) equipped with HR-TEM, and X-ray diff raction (XRD) analysis, to be amorphous SiO2.