Recycling of silicon kerf waste for preparation of porous SiC _w /SiC membrane supports by in situ synthesis

Abstract

Abstract Recycling has enormous economic benefits and practical significance under the context of gradually increasing solid wastes. In order to recycle and reuse the silicon kerf waste, in this work, porous SiC w /SiC ceramics were successfully prepared by in situ synthesis from silicon kerf waste and fired at 1400‐1500°C for 4 hours. The results showed that these porous ceramics, reinforced by the interlocking whisker, revealed high apparent porosity (48.02%‐51.76%) and cold compressive strength (5.68‐9.54 MPa). Furthermore, the practicable pore size (2.09‐2.53 μm) and decent durability showed the potential of these porous ceramics as membrane supports. This work verified the possibility of the SiC‐based ceramics prepared from the silicon kerf waste.