ZHOU Jian'er, FENG Yong, XIAO Zhuohao

(School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen, Jiangxi 333403, China)

Abstract:Silicon carbide ceramic was prepared via 1420℃ vacuum sintering technology by using polysilicon line cutting waste as main material, doped with a proper amount of SiC powder. The purpose of the present work was to study the effects of the amount of SiC powder on the bulk density, porosity and bending strength of SiC ceramic products. The results show that the apparent porosity increases gradually, the bulk density and bending strength increase at first and then decrease when more SiC powder is added to the material. The SiC ceramic product has the highest bulk density (2.25g/cm3) and the highest bending strength (99.8MPa) when 10 wt.% of SiC powder is added.

Key words:  silicon carbide; polysilicon line cutting waste; porosity; flexure strength