▎ 摘　　要

NOVELTY - Preparing porous silicon carbide ceramic comprises (i) mixing silicon carbide powder, dolomite powder, starch, silicon powder and polyvinyl alcohol aqueous solution, kneading and extruding to obtain particles, (ii) mixing the silicon carbide powder, starch, aluminum alloy powder and graphene quantum dot, and placing the particles obtained in the step (i) in the obtained mixture, rolling to obtain spherical particles, and (iii) cold pressing the pellet obtained in the step (ii), and sintering to obtain the porous silicon carbide ceramic. USE - The method is useful for preparing porous silicon carbide ceramic. ADVANTAGE - The method: enables preparation of porous silicon carbide ceramic material with porosity of more than 80%; has excellent mechanical performance, and three-point bending strength of more than 50 MPa.