▎ 摘　　要

NOVELTY - A composite material comprises a thermosetting polymer reinforced with natural fibers. USE - Material e.g. composite plate used for manufacturing ceramic material for armor in multilayer ballistic system (all claimed). ADVANTAGE - The composite material provides economical ceramic material having reduced thickness and weight. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: manufacture of the composite material, which involves accommodating ramie fiber functionalized with graphene oxide corresponding to the desired proportion of 30 vol.% within a suitable metallic mold, and adding polyester resin which is fluid and covering the mold; a composite plate, which comprises a ramie fiber functionalized with graphene oxide reinforcing polyester matrix which is used as a layer in ballistic shielding to protect against rifle shots with 7.62 mm or 5.56 mm caliber ammunition; a ceramic material with a thicknesses of 7-10 mm, which is obtained using alumina doped with 4 %mass niobium with hexagonal geometry, weighing and packing the alumina powder, niobium powder and polyethylene glycol in liquid phase in a mill of alumina balls for 12 hours, and leaving for 48 hours in an oven at 80° C for drying; manufacture of the ceramic material; a multilayer armor, which comprises the composite plate that is glued with polyurethane adhesive to a ceramic front layer, and responsible for eroding projectile and attenuating the impact; and a composite in multilayer ballistic system.