▎ 摘　　要

NOVELTY - Preparation of graphene-carbon graphite composite isostatic pressing material involves adding powder comprising asphalt coke powder, carbon black powder and graphite powder to a kneading pot, performing dry mixing-wet mixing process in order to form paste (P), rolling the paste into 1-10 microm precursor (A), adding polyvinyl alcohol as dispersant to water to form a water-soluble dispersant solution, adding 15-25% graphene as raw material to 75-85% dispersant solution to form precursor (B), adding 70-75% precursor (A) and 25-30% precursor (B) to the kneading pot, uniformly stirring, performing dry mixing-wet mixing process in order to form kneading billets, grinding the billets, sieving, adding sieved powder (S) to a rubber mold, sealing the mold, performing cold isostatic pressing, subjecting obtained blank to carbonization-impregnation-secondary carbonization-secondary impregnation-solidification-tertiary carbonization process, and graphitizing carbonized billets. USE - Preparation of graphene-carbon graphite composite isostatic pressing material (claimed) . ADVANTAGE - The method enables to prepare graphene-carbon graphite composite isostatic pressing material, which has high mechanical strength, and excellent physical and chemical index of the graphite. DETAILED DESCRIPTION - Preparation of graphene-carbon graphite composite isostatic pressing material involves adding powder with particle size of 1-8 microm to a kneading pot, uniformly stirring, performing dry mixing-wet mixing process in order to form paste (P), rolling the paste into 1-10 microm precursor (A), adding 3-4% polyvinyl alcohol having purity of 85-115% as dispersant to water to form a water-soluble dispersant solution, adding 15-25% graphene raw material with particle size of 4-10 microm to 75-85% dispersant solution to form precursor (B), adding 70-75% precursor (A) and 25-30% precursor (B) to the kneading pot, uniformly stirring, sequentially performing dry-mixing process at 130-140degrees Celsius for 60-80 minutes and wet-mixing at 140-160degrees Celsius for 20-40 minutes, heat-preserving for 3.5-5 hours to form kneading billets, grinding the billets, sieving to obtain 15-30 microm powder, adding sieved powder (S) to a rubber mold, sealing the mold, performing cold isostatic pressing, subjecting obtained blank having bulk density of 1.8-2.2 g/cm3 to carbonization-impregnation-secondary carbonization-secondary impregnation-solidification-tertiary carbonization process to form carbonized billets, and graphitizing the carbonized billets. The paste is preferably formed by adding 30% asphalt coke powder with particle size of 1-3 microm, 40% carbon black powder with purity of 99% and particle size of 2-5 microm, and 30% graphite powder with particle size of 3-8 microm to the kneading pot, uniformly stirring, dry-mixing at 130-140degrees Celsius for 60-80 minutes to form a dry mixture, adding 30% binder having purity of 85-115% to 70% dry mixture, uniformly stirring, wet-mixing at 140-170degrees Celsius for 20-40 minutes, and heat-preserving for 2.5-3.5 hours. The impregnation process is performed using an impregnating agent with purity of 85-115%. An INDEPENDENT CLAIM is included for the graphene-carbon graphite composite isostatic pressing material, which has bulk density of 2 g/cm3 or more, resistivity of 6 microOhmm or less, Shore hardness of 90 HS or more, compressive strength of 300 MPa or more, ash content of 0.20% or less, purity of 99% or more and apparent porosity of 1.5% or less. DESCRIPTION OF DRAWING(S) - The drawing shows a flow chart illustrating preparation of the graphene-carbon-graphite composite isostatic pressing material. (Drawing includes non-English language text)