▎ 摘　　要

NOVELTY - Preparing silicon carbide slurry using carbon nanotube and graphene as carbon source comprises uniformly mixing carbon nanotube and graphene, silicon carbide powder, boron carbide powder and cubic boron nitride powder to obtain silicon carbide mixture, adding dispersant, plasticizer, carboxymethyl cellulose, binder and defoaming agent, mixing uniformly, adding alkaline substance to adjust the pH of the slurry, uniformly ball milling under vacuum, vacuum extracting and ultrasonically stirring to remove bubbles and increase dispersibility of reinforced carbon nanotube and graphene in the slurry. USE - The silicon carbide slurry is useful in preparing ceramic preform. ADVANTAGE - The slurry: produces ceramic perform, which does not initiate cracking; does not cause emission of organic compounds; is environmentally friendly; and utilizes simple equipment. DETAILED DESCRIPTION - Preparing silicon carbide slurry using carbon nanotube and graphene as carbon source comprises (a) uniformly mixing 0.1- wt.% carbon nanotube and graphene, 92-98.9 wt.% silicon carbide powder, 0.5-1.5 wt % boron carbide powder and 0.5-1.5 wt.% cubic boron nitride powder to obtain silicon carbide mixture, (b) adding 2-3 wt.% dispersant, 1-5 wt.% plasticizer, 10-15 wt.% carboxymethyl cellulose, 350-450 wt.% binder and 3-10 wt.% defoaming agent into 100 wt.% silicon carbide mixture, where the solid phase content of the slurry is 10-65 vol.%, mixing uniformly, adding alkaline substance into the slurry to adjust the pH of the slurry to 9-12, and uniformly ball milling under vacuum, and (c) vacuum extracting and ultrasonically stirring under low speed to remove bubbles in the slurry, and increase the dispersibility of reinforced carbon nanotube and graphene in the slurry.