Effects of additives on the microstructure of synthesized SiC particles by using silica sol/bamboo charcoal system

摘要

Silicon carbide (SiC) particles were synthesized by carbothermal reaction using HBO_3, (NH)_4Cl and nano-SiC as additives, and the effects of three additives on the microstructure of SiC particles were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The three additives didn't affect the structural characteristics of SiC. HBO_3 could promote the growth of resulting rod-like SiC, (NH)_4Cl to some extent restricted the formation of rod-like SiC, and nano-SiC promoted the formation of rod-like SiC and decreased the radial size.