▎ 摘　　要

NOVELTY - Preparing graphene reinforced boron carbide ceramic material comprises e.g. adding N-methylpyrrolidone having purity of greater than or equal to 99.9% into deionized water so that the concentration of the aqueous solution of the dispersant is 1%, and dispersing the aqueous solution of the dispersant with a good ratio, weighing boron carbide powder and graphene oxide to be added, where the weight of graphene oxide is 0.5-1% weight of the boron carbide powder, adding graphene oxide to the dispersant solution obtained in step (1), and shaking ultrasonically, pouring the boron carbide powder into the container and adding the defoaming agent, pouring the aqueous solution of the graphene dispersed in step (2) into container of boron carbide powder, and mechanically stir to fully mix the graphene oxide with the boron carbide powder, and oscillating ultrasonically, granulating, hot pressing and sintering. USE - The method is useful for preparing graphene reinforced boron carbide ceramic material. ADVANTAGE - The method: reduces the attraction between the graphene sheets to avoid agglomeration; has good dispersivity and stability. The ceramic material has relatively stable toughening effect. DETAILED DESCRIPTION - Preparing graphene reinforced boron carbide ceramic material comprises (1) adding N-methylpyrrolidone having purity of greater than or equal to 99.9% into deionized water so that the concentration of the aqueous solution of the dispersant is 1%, and dispersing the aqueous solution of the dispersant with a good ratio, (2) weighing boron carbide powder and graphene oxide to be added, where the weight of graphene oxide is 0.5-1% weight of the boron carbide powder, adding graphene oxide to the dispersant solution obtained in step (1), and shaking ultrasonically, (3) pouring the boron carbide powder into the container and adding the defoaming agent, pouring the aqueous solution of the graphene dispersed in step (2) into container of boron carbide powder, and mechanically stir to fully mix the graphene oxide with the boron carbide powder, and oscillating ultrasonically, (4) placing the step (3) dispersed mixed solution in constant temperature drying oven, and stirring at intervals after period of time until it cannot be stirred, the moisture content of the powder to be powdered is 2-3% by rapid moisture analyzer, and pouring the dried powder into grinding crucible for grinding and granulation, and then sieving through 60-mesh sieve, and (5) placing a layer of graphite paper on the inside of the graphite mold, and graphite blocks and graphite paper on the bottom of the mold, filling the composite powder prepared in the step (4) uniformly into graphite mold, and again covering with graphite paper and a graphite block, pre-pressing with cylinder of corresponding size, and placing the mold in a hot press furnace for hot pressing.