▎ 摘　　要

NOVELTY - A composite material comprises thermosetting polymer reinforced with natural fiber. USE - Material e.g. composite plate used for manufacturing ceramic material for armor in multilayer ballistic system (all claimed) such as military vehicle for protection against firing of rifle with ammunition of high impact power. 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 the ramie fiber functionalized with graphene oxide corresponding to the desired proportion of 30 vol.% within a suitable metallic mold, and adding epoxy resin which is fluid and covering the mold; 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; 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; 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 composite in multilayer ballistic system.