▎ 摘　　要

NOVELTY - Manufacture of hot plate involves adding 5 pts. wt. graphite flakes to a mixed solution consisting of 45 pts. wt. nitric acid and 90 pts. wt. sulfuric acid under stirring for 30 minutes-1 hour, adding 50 pts. wt. potassium chlorate several times at 0 degrees C to control the rapid reaction of the graphite flake mixture and the oxidizing agent to be added, stirring at room temperature for 120 hours, washing and filtering until pH 6.5 to stop the oxidation reaction by removing the residual oxidizing agent, and drying for 24 hours at 80 degrees C in a vacuum atmosphere to prepare graphite oxide, exposing the prepared graphite oxide to a high temperature environment of 1000 degrees C, generating carbon dioxide between the layers by the reaction between the functional groups and oxygen present in the graphite oxide, and the interlayer distance increases, wet coating the prepared graphene on the hot plate using a wet coating method, drying at 100 degrees C in a vacuum atmosphere for 24 hours. USE - Manufacture of hot plate for thermal fusion of lead acid battery case. ADVANTAGE - The method enables manufacture of hot plate having excellent corrosion resistance, thermal conductivity and wear resistance. DETAILED DESCRIPTION - Manufacture of hot plate involves adding 5 pts. wt. graphite flakes to a mixed solution consisting of 45 pts. wt. nitric acid and 90 pts. wt. sulfuric acid under stirring for 30 minutes-1 hour, adding 50 pts. wt. potassium chlorate several times at 0 degrees C to control the rapid reaction of the graphite flake mixture and the oxidizing agent to be added, stirring at room temperature for 120 hours, washing and filtering until pH 6.5 to stop the oxidation reaction by removing the residual oxidizing agent, and drying for 24 hours at 80 degrees C in a vacuum atmosphere to prepare graphite oxide, exposing the prepared graphite oxide to a high temperature environment of 1000 degrees C, generating carbon dioxide between the layers by the reaction between the functional groups and oxygen present in the graphite oxide, and the interlayer distance increases, wet coating the prepared graphene on the hot plate using a wet coating method, drying at 100 degrees C in a vacuum atmosphere for 24 hours. The wet coating comprises a dispersion comprising a solvent in which 40 wt.% acetone and 60 wt.% distilled water are mixed, and the amount of graphene added to the solvent is 1:0.05 compared to the dispersion, and the prepared graphene dispersion is dispersed on a hot plate. The precipitation of the dispersion during the coating time is prevented by adding 5-10 pts. wt. carboxymethyl cellulose. The wet coating using the graphene dispersion is deposited using an electrospray coating (ESC) method. The oxide film and contaminants of the surface layer on the aluminum hot plate are removed before wet coating. The contaminated layer is polished using 800 grit silicon carbide abrasive paper, and after polishing, the contaminants are removed through ultrasonic cleaning in acetone for 10 minutes. The electrospray deposition involves flexibly providing a voltage of 10-15 kV to prevent agglomeration coating of the graphene dispersion, and a movement speed of 10 cm/minute is set at an interval of 10 mm in the X-axis direction, and then moved in the form of a square wave by uniform coating, spraying at a spraying rate of 500 mu L per minute, and coating at a spraying amount of 1 mL per unit area, and heating to 100 degrees C to quickly evaporate the solvent to minimize agglomeration.