▎ 摘　　要

NOVELTY - Preparing carbon/metal composite interface welding high-thermal-conductivity thick film, involves using metal powder, metal salt, and graphene oxide as raw materials, where ratio of metal powder, metal salt and graphene oxide is 50-100 phr:20-60 phr:100 phr. The ultra-high molecular weight polymers are used as additives, with molecular weights ranging from 500,000-30 million. The organic solvents as diluents, and raw materials includes auxiliary and diluent in ratio of 100 phr:10-20 phr:1000-5000 phr, mixed well with a ball mill, and then carrying out vacuum defoamation to obtain a final mixed solution, and injecting the mixed solution into an injector. The mixed solution is enabled to pass through a square micro-channel with the thickness of 1-20 microm, controlling the solution viscosity at 10-100 Pa.S. USE - Method for preparing carbon/metal composite interface welding high-thermal-conductivity thick film. ADVANTAGE - The metal diffuses into the carbon film and the carbon element, while reducing graphene oxide to form a strong carbon compound, where graphene oxide and graphene are both carbonaceous materials. The homogeneous interface welding further reduces the interface and increase the bonding, and also reduces thermal resistance of the interface, and finally obtain a thick film with high thermal conductivity. DETAILED DESCRIPTION - Preparing carbon/metal composite interface welding high-thermal-conductivity thick film, involves using metal powder, metal salt, and graphene oxide as raw materials, where ratio of metal powder, metal salt and graphene oxide is 50-100 phr:20-60 phr:100 phr. The ultra-high molecular weight polymers are used as additives, with molecular weights ranging from 500,000-30 million. The organic solvents as diluents, and raw materials includes auxiliary and diluent in ratio of 100 phr:10-20 phr:1000-5000 phr, mixed well with a ball mill, and then carrying out vacuum defoamation to obtain a final mixed solution, and injecting the mixed solution into an injector. The mixed solution is enabled to pass through a square micro-channel with the thickness of 1-20 microm, controlling the solution viscosity at 10-100 Pa.S, extruded and paved the solution on a carbon film, and superposed the carbon film on which the mixed solution is paved to finally obtain a block material with the graphene oxide film/carbon film alternately stacked. The gradient welding is carried out on the block materials, and welded for 10 minutes under 60 watt output power, preferably 15 minutes under 250 watt output power, and more preferably 10 minutes under the condition of 2900 watt output power to finally obtain the reduced high-flux high-thermal-conductivity thick film material.