A new pore former (yeast) was used to fabricate SiC porous ceramics for the first time. The main components of yeast are C, H, O, N, P, S. Change of components of the SiC porous ceramics in sintering process was investigated in detail. The dispersion and stability of sluny depended strongly on the content of glycerol. The sintering behavior of tlie SiC porous ceramics showed a great difference with the change of the content of sintering aid (AI_2O_3) and the optimal content of AI_2O_3 was around 5% -10% . The amount of yeast has great influence on the porosities and flexural strength of the SiC porousceramics. In addition, the sintering temperature and hold time had great influence on sintering properties of the SiC porous ceramics. The effect of sintering temperature on the components of the sintered products is very evident.

Key words: SILICON CARBIDE, CERAMICS, TG, DTA, XRD, POROSITY