▎ 摘　　要

NOVELTY - Preparation of a high-hardness graphene material comprises grinding graphite, dimethylacetamide, and polyvinylidene difluoride for 20-30 minutes, sieving with 300-400-mesh, and oven-drying for 15-55 minutes; adding sorbitan monooleate, talc powder, glacial acetic acid, and aramid fiber; heating to 50-70 degrees C while stirring at for 160-200 revolutions/minute (rpm) 40-60 minutes; adding methenamine, silica, diisononyl phthalate, and tribasic lead sulfate; heating to 75-85 degrees C for 50-90 minutes; uniformly stirring; and adding to a double-screw extruder; and adding lead oxide, calcium carbonate, titanium dioxide, and antioxidant; mixing and calcining at 600-800 degrees C for 4-6 hours in a tubular furnace, under the protection of nitrogen, standing, and cooling. USE - Method for preparing a high-hardness graphene material. ADVANTAGE - The method is inexpensive, easy, and energy-saving. The graphene material has a Rockwell hardness of 110-150, good mechanical property, elongation at break of 600-800%, tensile-strength of 180-220 MPa, heat deformation temperature of 400-600 degrees C, good compression and energy density, high conductivity, and impact strength of 70-90 J/m. DETAILED DESCRIPTION - Preparation of a high-hardness graphene material comprises: (A) 100 pts. wt. graphite, 10-30 pts. wt. sorbitan monooleate, 3-5 pts. wt. talc powder, 5-15 pts. wt. glacial acetic acid, 0.5-4.5 pts. wt. lead oxide, 15-25 pts. wt. aramid fiber, 0.6-1 pts. wt. methenamine, 15-35 pts. wt. dimethylacetamide, 3-7 pts. wt. calcium carbonate, 2-6 pts. wt. silica, 4-8 pts. wt. polyvinylidene difluoride, 10-30 pts. wt. diisononyl phthalate, 8-12 pts. wt. tribasic lead sulfate, 1.5-5.5 pts. wt. titanium dioxide, and 2-6 pts. wt. antioxidant; (B) grinding graphite, dimethylacetamide, and polyvinylidene difluoride for 20-30 minutes, sieving with 300-400-mesh, and oven-drying at 60-80 degrees C for 15-55 minutes; adding sorbitan monooleate, talc powder, glacial acetic acid, and aramid fiber; heating to 50-70 degrees C while stirring at for 160-200 revolutions/minute (rpm) 40-60 minutes; (C) adding methenamine, silica, diisononyl phthalate, and tribasic lead sulfate; heating to 75-85 degrees C for 50-90 minutes; uniformly stirring; and adding to a double-screw extruder; and (D) adding lead oxide, calcium carbonate, titanium dioxide, and antioxidant; mixing at 700-900 rpm and calcining at 600-800 degrees C for 4-6 hours in a tubular furnace, under the protection of nitrogen, standing, and cooling.