WANG Yanxiang , XIAO Jianxiang,  SUN Jian,  JIANG Chao

(Jingdezhen Ceramic Institutes, Jingdezhen, Jiangxi 333001)

Abstract:  Porous SiC ceramic was prepared by adding colloid graphite and SiC powder to the main material photovoltaic silicon line cutting waste by the method of solid phase sintering. The effects of the sintering system and the addition of the amount of graphite on the property of porous SiC ceramic were mainly discussed. Results show that porous SiC ceramic was obtained by sintering polysilicon line cutting waste buried in carbon black. The bulk density, water absorptivity and porosity of the as-prepared sample sintered at 1400℃ were 1.65g/cm3, 26.92% and 43.96%, respectively. The water absorptivity, bulk density, and porosity of the sample prepared with the Si/C mol ratio of 1:6 and sintered at 1600℃ were 15.65%, 1.84g/cm3 and 38.25%, respectively.

keywords:  photovoltaic silicon line cutting waste ; porous SiC ceramic ; process conditions ; performance