▎ 摘　　要

NOVELTY - The preparation method of graphene-reinforced zirconia ceramic, involves dissolving zirconium oxychloride in water to prepare solution (I), dissolving ammonium bicarbonate in water to prepare solution (II), adding polyethylene glycol to solution (II), taking ammonium bicarbonate as solution (III), dripping solution (I) to solution (III), stirring, filtering to obtain basic zirconium oxycarbonate precipitate, taking out basic zirconyl carbonate precipitate, washing, filtering, assaying filtrate using silver nitrate, drying and evaporating n-butanol to obtain basic zirconyl carbonate. USE - Preparation of graphene-reinforced zirconia ceramic (claimed). ADVANTAGE - The method enables preparation of graphene-reinforced zirconia ceramic with high bending strength, increased toughness and enhanced wear resistance. DETAILED DESCRIPTION - The preparation method of graphene-reinforced zirconia ceramic, involves (A) dissolving 17.8 g zirconium oxychloride in 500 ml water to prepare 0.2 mol/l solution (I), (B) dissolving 39.5 g ammonium bicarbonate in 1000 ml water to prepare 0.5 mol/l solution (II), (C) adding 2.08 g polyethylene glycol to solution (II), taking 0.5 mol/l ammonium bicarbonate as solution (III), (D) dripping solution (I) to solution (III), stirring for 1 hour using magnetic stirrer, filtering to obtain basic zirconium oxycarbonate precipitate, (E) taking out basic zirconyl carbonate precipitate, washing with deionized water, filtering, assaying filtrate using silver nitrate, (F), the basic zirconium oxycarbonate precipitate comprises mixture of free chlorine ions and n-butanol at mass ratio of 1:5, dehydrating at 95 degrees C and drying at 120 degrees for 1 hour, evaporating n-butanol to obtain basic zirconyl carbonate, (G) calcining the basic zirconyl carbonate at 1400 degrees C for 3 hours, cooling the calcined product to 25 degrees C to obtain superfine zirconia powder, preparing colloidal suspension of graphene oxide solution by mixing 5 g ultra-fine graphite with 125 ml 98% concentrated sulfuric acid, stirring in ice bath for 30 minutes, mixing fully, and adding 20 g potassium permanganate to beaker, placing in 35 degrees C constant temperature water bath, continue stirring for 2 hours after adding 10 ml deionized water, carrying out reaction at 80 degrees C for 15 minutes, adding 5% hydrogen peroxide until no gas generation, filtering, washing with 5% dilute hydrochloric acid and deionized water until the solution is neutral, filtering to obtain filter cake, drying the filter cake at 60 degrees C for 24 hours, obtaining oxidized graphite, adding oxidized graphite in 400 ml deionized water to prepare solution (IV), ultrasonically dispersing solution (IV) for 1 hour to obtain oxidized graphene dispersion solution (V), centrifuging the solution (V) for 10 minutes to obtain stable colloidal suspension solution of graphene oxide (VI), preparing graphene zirconia ceramic ultrafine powder by adding superfine zirconia powder obtained in step (A) into graphene suspension solution (VI) obtained in step (B) to form solution (VII), heating the solution (VII) at 60 degrees C for 24 hours to obtain oxidized graphene zirconia mixture, transferring graphene oxide zirconia mixture into tube furnace and reacting at 600 degrees for 30 minutes in the presence of nitrogen.