▎ 摘　　要

NOVELTY - The method involves preparing graphene oxide slurry (5). The vacuum defoams the graphene oxide slurry. The defoamed graphene oxide slurry is injected into the gypsum mold (11) and the graphene oxide slurry is pressurized with high-pressure gas to dehydrate the graphene oxide, and then demould to obtain a blank. The blank is dried. The dried billet is thermally reduced to obtain a graphene billet. The graphene blank is sintered under an inert atmosphere to obtain a semi-finished product. The semi-finished product is calendered to obtain an ultra-thick graphene heat-conducting heat sink. The moisture content of the graphene oxide slurry is 85-90%. The plaster mold is evacuated first, and then the graphene oxide slurry is injected. The high pressure gas is high pressure nitrogen or high pressure argon. USE - Manufacturing method for ultra-thick graphene thermally conductive heat sink. ADVANTAGE - The method effectively breaks through the limit of the thickness of the film layer, it can realize the graphene heat conducting and radiating product thickness from 300-1000 microns for any customized production, the cost is reduced more than 50% and can production efficiency more than 20% compared with the existing coating process. The method uses the high pressure inert gas to press the graphene oxide slurry into the gypsum mold to form, in the forming process, the water in the graphene oxynitride slurry is continuously and quickly transferred to the gypsum due to the good water absorption of gypsums, the directional fluidity of moisture generated in the transfer process can make the graphene-oxide form directional stacking arrangement in the mold cavity along the thickness direction. The high pressure gas applied when glue forming accelerates the transfer of DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a molding device for manufacture of ultra-thick graphene heat-conducting fins. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a ultra-thick graphene heat-conducting heat sink. high pressure gas source (1) Vacuum pump (2) Graphene oxide slurry (5) Valve (8) Gypsum mould (11)