▎ 摘　　要

NOVELTY - A nano composite microwave absorbent comprises graphene oxide, silica and nano ferroferric oxide, where core-shell structure is prepared by coating silica with nano ferroferric oxide and embedding with graphene oxide sheet. USE - Nano composite microwave absorbent. ADVANTAGE - The product is lightweight, has large specific surface area, wide microwave absorption frequency, maximum absorption intensity, stable chemical property and strong applicability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of nano composite microwave absorbent comprising taking ferroferric oxide nanoparticle, dispersing in absolute ethanol, obtaining ferroferric oxide ethanol solution, adding ethyl orthosilicate and ammonia water, stirring and reacting, washing with absolute ethanol, obtaining precipitate, drying to obtain silica coated ferroferric oxide nanoparticle, activating and dispersing in organic solvent, adding gamma -aminopropyl triethoxysilane, stirring and reacting, cooling, centrifuging, washing, drying to obtain amino modified silicon dioxide coated ferroferric oxide nanoparticle, adding carbodiimide and N-hydroxysuccinimide, stirring and reacting, filtering, washing, and drying.