▎ 摘　　要

NOVELTY - The silicon oxide-coated graphene composite absorbing material includes a silicon oxide hollow structure and graphene coated inside the silicon oxide hollow structure. The diameter of the silicon oxide hollow structure is 10-500 μm. USE - Silicon oxide-coated graphene composite absorbing material used for improving weapon's battlefield survivability and precision strike capability using stealth technology in modern warfare. ADVANTAGE - The synthesis process of the silicon oxide-coated graphene composite absorbing material has good repeatability, low cost, environmentally-friendly, cleanness and non-toxicity, and is easy for large-scale production. The structure and morphology of the prepared composite materials are conducive to the absorption of electromagnetic waves under high temperature conditions, which provides an effective way for the design of ideal high-temperature composite electromagnetic wave-absorbing materials that can be practically applied. The silicon oxide-coated graphene composite absorbing material uses ultra-light heat-preserving particles as the coating layer of the wave-absorbing material, and adds a wave-absorbing agent to prepare a wave-absorbing composite material to improve the wave-absorbing performance. An effective way for the design of ideal and practical high-temperature composite silicon oxide-coated graphene composite absorbing material is achieved. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a preparation method of silicon oxide-coated graphene composite absorbing material, which involves mixing graphene and carboxymethyl cellulose, stirring evenly, placing in sodium silicate solution, stirring, adding water while stirring, stirring until a suspension is obtained, dispersing the suspension by ball milling, solidifying, and drying to obtain a solid mixture. The solid mixture is pulverized, pickled, washed with water, and dried to obtain a silicon oxide-graphene composite material that is heat-treated. DESCRIPTION OF DRAWING(S) - The drawing shows the schematic diagrams of the wave-absorbing performance of the silicon oxide-coated graphene composite wave-absorbing material before heat treatment and after heat treatment. (Drawing includes non-English language text)