▎ 摘　　要

NOVELTY - The brick has an electric heating layer formed with a composite material, where 5-9 pts. wt. graphite, 2-4 pts. wt. silver, 1-2 pts. wt. alumina are contained in the composite material of the electric heating layer, grain diameter of silver powder is 15-28 microns, ball milling time of alumina ball is 2h and rotating speed of the alumina ball is 100r/min. An insulating layer is formed with a porous expanded perlite material and polyimide, where mass ratio of the porous expanded perlite material and the polyimide is 3-5. USE - Graphene composite material brick. ADVANTAGE - The brick solves floor heating problem, and has stable output power and small thermal expansion coefficient.