▎ 摘　　要

NOVELTY - Preparing nickel-coated graphene comprises e.g. (i) decomposing graphite into 10-20 nm particles, and blowing granular graphite into stainless steel tube with nitrogen, heating, generating high-frequency oscillation to form network channel to accelerate separation of graphite, heating, introducing nitrogen, heating by gradient, propagating ultrasonic wave in the tube, forming vibrating network, dispersing and agglomerating graphene, and condensing, and (ii) adding metallic nickel into intermediate frequency furnace, forming vibrating mesh, distributing nano-graphene in air, and pouring nickel water into high-speed port, blowing into vacuum, and moving in high-speed linear motion, performing high-speed mesh collision, ultrasonic mesh vibration dispersion, hitting nickel powder with graphene at super speed to coat the graphene, filling with nitrogen and filtering, and (iii) adding high temperature resistant aqueous resin into nickel-coated graphene. USE - The nickel-coated graphene is useful in the field of coating. ADVANTAGE - The coating: has prolong service life. The method: has simple process; and improves the use efficiency of heat exchangers and condensers. DETAILED DESCRIPTION - Preparing nickel-coated graphene comprises (i) decomposing graphite into 10-20 nm particles by thermal decomposition, and blowing granular graphite into stainless steel tube with nitrogen, heating at 1250 degrees C by ultra-high frequency induction heating at a length of 5 meters, then generating high-frequency oscillation in the tube to form network channel to accelerate the separation of graphite, heating at medium temperature of 600-850 degrees C using electric air heater at 30 m, and ensuring the pressure of 105 pa, introducing nitrogen, controlling the temperature of 10 m long part at 30-500 degrees C, heating by gradient, propagating ultrasonic wave at a speed of 5300 m/s in the tube, forming vibrating network, dispersing and agglomerating graphene, and condensing at -0 to 20 degrees C to obtain the 10-20 nm graphene particles at the outlet, where length of the tube is 50 m, and (ii) adding metallic nickel into intermediate frequency furnace, forming vibrating mesh using ultrasonic waves, distributing nano-graphene in the air, and pouring nickel water into high-speed port, blowing into the vacuum at wind speed of 560 m/s, and moving in high-speed linear motion in the vacuum tube, performing high-speed mesh collision, ultrasonic mesh vibration dispersion to distribute graphene in the air in a mesh shape, hitting nickel powder with graphene at super speed to coat the graphene, and then filling with nitrogen and filtering with ultrasonic screen, and (iii) adding 70-100 g high temperature resistant aqueous resin into 10-20 g nickel-coated graphene to obtain coating, where the electrical and thermal conductivity of coating is 58-73 w/(m. degrees C).