▎ 摘　　要

NOVELTY - Preparing boron carbide single board ceramic comprises (1) taking 22-43 pts. wt. boron carbide powder, 9-15 pts. wt. graphene, 12-22 pts. wt. ethanol, 4-8 pts. wt. dispersing agent, 2-7 pts. wt. silicone rubber, 3-9 pts. wt. vanadium diboride, 5-7 pts. wt. core-shell structure polymer, 2-5 pts. wt. silane coupling agent and 6-11 pts. wt. epoxy resin, (2) dissolving a dispersing auxiliary agent in ethanol to prepare a solution, then adding graphene powder into solution and dispersing by high-pressure homogenization process to obtain graphene suspension with uniformly dispersed grapheme, (3) preparing toughening powder by (3.1), taking silicon rubber, vanadium diboride and core-shell structure polymer, adding the silicon rubber, vanadium diboride and core-shell structure polymer into a reaction kettle, heating, stirring and cooling, and (3.2), adding the silane coupling agent and epoxy resin into the reaction kettle and stirring to obtain mixed material. USE - The boron carbide single board ceramic is useful in bullet proof ceramic. ADVANTAGE - The method: improves the anti-ballistic performance, anti-bending performance and protective performance; and the obtained product has ultrahigh hardness and prolonged service life. DETAILED DESCRIPTION - Preparing boron carbide single board ceramic comprises (1) taking 22-43 pts. wt. boron carbide powder, 9-15 pts. wt. graphene, 12-22 pts. wt. ethanol, 4-8 pts. wt. dispersing agent, 2-7 pts. wt. silicone rubber, 3-9 pts. wt. vanadium diboride, 5-7 pts. wt. core-shell structure polymer, 2-5 pts. wt. silane coupling agent and 6-11 pts. wt. epoxy resin, (2) dissolving a dispersing auxiliary agent in ethanol to prepare a solution, then adding graphene powder into the solution and dispersing for 15-22 hours by adopting a high-pressure homogenization process to obtain a graphene suspension with uniformly dispersed grapheme, (3) preparing toughening powder by (3.1), taking silicon rubber, vanadium diboride and core-shell structure polymer, sequentially adding the silicon rubber, vanadium diboride and core-shell structure polymer into a reaction kettle, heating to 60-90degrees Celsius, stirring for 1-2 hours and cooling, (3.2), adding the silane coupling agent and epoxy resin into the reaction kettle and stirring for 20-40 minutes to obtain a mixed material, (3.3) extruding the mixed material through a double-screw extruder, granulating, drying and crushing to obtain toughening powder, (4) adding the boron carbide powder obtained in the step (1), graphene suspension prepared in the step (2) and toughening powder obtained in the step (3) into a three-roll grinding machine for mixing,(5) adding the base material with uniform particle size distribution, fluidity and moderate moisture content obtained in the step (4) into a granulator for granulation, where the particle size is 5-100 microm, then drying at the drying temperature of 100-110degrees Celsius and obtaining granulation powder after drying, (vi) performing dry pressing on the granulated powder by adopting bidirectional compression molding to obtain a green body with the density of 1.5-1.8 g/cubic centimeter, and (vii) degreasing the green body and filling protective gas to pressurize, sintering and forming to obtain final product.