▎ 摘　　要

NOVELTY - Preparing manganese (Mn)-based graphite composite isostatic pressing conductive high polymer material involves obtaining components meeting index conditions, where the components comprise aggregate with the particle size of 1-45 mum, powder with the particle size of 5-40 mum, binder, an impregnant and reduced Mn powder with the particle size of 10-50 mum, aggregate is petroleum coke, and powder comprises graphene, carbon black and special graphite powder. USE - Method for preparing Mn-based graphite composite isostatic pressing conductive polymer material used in electronic, electric appliance field, and electronics industry. ADVANTAGE - The Mn-based graphite composite isostatic pressing conductive polymer material has uniform and exquisite structure, high volume density, good physical and chemical index, enhanced conductivity and mechanical strength of the material with small abrasion, high temperature resistance, strong thermal conductivity, excellent corrosion resistance effect, and improved service life and stability, and Mn-based graphite composite isostatic pressing conductive high polymer material has conductivity of more than or equal to 350S/cm, breaking strength of more than or equal to 45MPa and compressive strength of more than or equal to 85 MPa. DETAILED DESCRIPTION - Preparing manganese (Mn)-based graphite composite isostatic pressing conductive high polymer material involves obtaining components meeting index conditions, where the components comprise aggregate with the particle size of 1-45 mum, powder with the particle size of 5-40 mum, binder, an impregnant and reduced Mn powder with the particle size of 10-50 mum, aggregate is petroleum coke, and powder comprises graphene, carbon black and special graphite powder. The aggregate and the powder material are mixed to prepare mixed material powder A passing through a vibrating screen, where the mixing temperature is 100-200degrees Celsius, mixing time is 1-1.5 hours, and the mixture is naturally cooled to room temperature after mixing, then performing process treatment for the first time, namely, after the mixed powder A is subjected to the processes of pressing, roasting, dipping and secondary roasting, crushing the prepared roasted blank B, and grinding the crushed roasted blank B into powder to prepare mixed powder A1 passing through a vibrating screen. The mixed powder A1 obtained and the Mn powder obtained are mixed to prepare mixed powder A2 passing through a vibrating screen, where amount of mixed powder A is 190-95 wt.%, and 5-10 wt.% Mn powder, where the mixing temperature is 160-180degrees Celsius, mixing time is 1.5-3h, and mixture is naturally cooled to room temperature after being mixed. The mixed powder A2 prepared is placed into a kneading pot, then dry mixing-wet mixing is performed to form paste, then performing second pre-pressing molding, crushing the second pre-pressed molded blank body, and grinding the crushed blank body into mixed powder A3 passing through a vibrating screen. 270-75 wt.% Mixed powder A2 is mixed with 25-30 wt.% binder in the wet mixing process. The method further involves carrying out isostatic compaction and process treatment, namely filling the mixed powder A3 into a rubber mold, sealing, carrying out cold isostatic compaction at a compaction pressure of 150MPa for 7 minute to form an isostatic compaction blank, and then carrying out the procedures of roasting, dipping, secondary roasting, secondary dipping and tertiary roasting on the isostatic compaction blank to form a roasted blank B1. The secondary dipping is to add liquid Mn with the purity of 99% as an impregnant into the roasted blank in the previous procedure. A graphitization treatment is then carried out by putting the roasted blank B1 prepared into a graphitization furnace, heating the roasted blank B1 to 2750-3200degrees Celsius under the condition of air isolation, converting the two-dimensional structure carbon product into a three-dimensional graphite grid structure, and transmitting power for 8-10 days according to the specification size of the product to form the Mn-based graphite composite isostatic pressing conductive polymer material.