▎ 摘　　要

NOVELTY - High-dielectric composite material comprises a first copper foil (1), a polyphenylene ether resin (2) and a second copper foil (3) stacked in sequence from bottom to top, where the polyphenylene ether resin has a sandwich structure film (6) composed of a graphene oxide film and a barium titanate film. USE - As high-dielectric composite material. ADVANTAGE - The high-dielectric composite material exhibits high dielectric constant and low loss, and the preparation method is simple and efficient. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing the high-dielectric composite material, comprising (i) dissolving the polyphenylene ether resin in an organic solvent to prepare a uniform polyphenylene ether viscous solution, where the mass ratio of the polyphenylene ether resin to the organic solvent is 1:5, (b) pouring 0.5-4 g polyphenylene ether viscous solution on the surface of the first copper foil, and forming a sandwich structure composed of graphene oxide film and barium titanate film on the polyphenylene ether viscous solution, pouring 0.5-4 g polyphenylene ether viscous solution for the second time, and finally stacking the second copper foil on the polyphenylene ether viscous solution that is poured twice to obtain the basic system of composite material, and (c) placing the basic system of the composite material in an oven to volatilize the organic solvent, and hot pressing for 24-48 hours to obtain the product. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the high-dielectric composite material. First copper foil (1) Polyphenylene ether resin (2) Second copper foil (3) Sandwich structure film (6)