# US 2014/0197353 A1 · Graphene/ceramic nanocomposite powder and a production method therefor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197353 A1 - Document ID: US20140197353A1 - Status: Published application - Kind: A1 - Application number: 14/161,292 - Filed: 2014-01-22 - Published: 2014-07-17 - Earliest claimed: 2011-07-29 - Assignees: Korea Advanced Institute of Sceince and Technology - Applicants: Korea Advanced Institute of Sceince and Technology - Inventors: Soonhyung Hong; Min Young Koo; Jaewon Hwang; Bin Lee - Web page: https://patentgrep.com/patent/US20140197353A1 ## CPC - C04B 35/01: based on oxide ceramics - C04B 35/053: Fine ceramics - C04B 35/117: Composites - C04B 35/12: based on chromium oxide (C04B35/047 and C04B35/105 take precedence) - C04B 35/14: based on silica - C04B 35/45: based on copper oxide or solid solutions thereof with other oxides - C04B 35/453: based on zinc, tin, or bismuth oxides or solid solutions thereof with other oxides, e.g. zincates, stannates or bismuthates - C04B 35/457: based on tin oxides or stannates - C04B 35/46: based on titanium oxides or titanates (containing also zirconium or hafnium oxides, zirconates or hafnates C04B35/49) - C04B 35/486: Fine ceramics - C04B 35/495: based on vanadium, niobium, tantalum, molybdenum or tungsten oxides or solid solutions thereof with other oxides, e.g. vanadates, niobates, tantalates, molybdates or tungstates - C04B 35/80: Fibres, filaments, whiskers, platelets, or the like - C04B 2235/422: Carbon - C04B 2235/425: Graphite - C04B 2235/666: Applying a current during sintering, e.g. plasma sintering [SPS], electrical resistance heating or pulse electric current sintering [PECS] - C04B 2235/96: Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance - C04B 2235/9607: Thermal properties, e.g. thermal expansion coefficient - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE ## Abstract The embodiments described herein pertain generally to graphene/ceramic nanocomposite powder including a matrix ceramic; and graphene dispersed in the matrix ceramic and a preparation method thereof, and a graphene/ceramic nanocomposite material including the graphene/ceramic nanocomposite powder and a preparation method thereof. ## Claims ### Claim 1 Graphene/ceramic nanocomposite powder comprising: a matrix ceramic; and graphene dispersed in the matrix ceramic. ### Claim 2 (depends on 1) The graphene/ceramic nanocomposite powder of claim 1, wherein the matrix ceramic includes a member selected from the group consisting of an oxide, a carbide, a nitride, a boride, and combinations thereof. ### Claim 3 (depends on 1) The graphene/ceramic nanocomposite powder of claim 1, wherein the graphene is interposed between ceramic particles of the matrix ceramic to be uniformly dispersed with being bonded to the ceramic particles. ### Claim 4 (depends on 1) The graphene/ceramic nanocomposite powder of claim 1, wherein an amount of the graphene dispersed in the matrix ceramic is in a range of from more than about 0 vol % to about 50 vol %. ### Claim 5 (depends on 1) The graphene/ceramic nanocomposite powder of claim 1, wherein the matrix ceramic includes a ceramic particle having a size in a range of from about 1 nm to about 10 μm. ### Claim 6 (depends on 1) The graphene/ceramic nanocomposite powder of claim 1, wherein the matrix ceramic is formed by calcining a metal salt. ### Claim 7 (depends on 6) The graphene/ceramic nanocomposite powder of claim 6, wherein the metal salt includes a salt of a metal selected from the group consisting of Al, Cu, Co, Ni, Sn, Cr, Mg, Zn, Si, Ti, Zr, Hf, V, Nb, Ta, Mo, W, Ag, Pt, Au, Pd, and combinations thereof. ### Claim 8 (depends on 1) A graphene/ceramic nanocomposite material comprising a sintered material of the graphene/ceramic nanocomposite powder according to claim 1. ### Claim 9 A preparation method of graphene/ceramic nanocomposite powder, comprising: (a) dispersing graphene oxide in a solvent; (b) introducing a metal salt which can be converted into a matrix ceramic, into the solvent in which the graphene oxide is dispersed to obtain a reaction mixture; and (c) performing a heat treatment of the reaction mixture to reduce the graphene oxide to calcine the metal salt to form graphene/ceramic nanocomposite powder including the graphene dispersed in the matrix ceramic. ### Claim 10 (depends on 9) The preparation method of graphene/ceramic nanocomposite powder of claim 9, wherein an amount of the graphene dispersed is in a range of from more than about 0 vol % to about 50 vol %. ### Claim 11 (depends on 9) The preparation method of graphene/ceramic nanocomposite powder of claim 9, wherein the metal salt includes a salt of a metal selected from the group consisting of Al, Cu, Co, Ni, Sn, Cr, Mg, Zn, Si, Ti, Zr, Hf, V, Nb, Ta, Mo, W, Ag, Pt, Au, Pd, and combinations thereof. ### Claim 12 (depends on 9) The preparation method of graphene/ceramic nanocomposite powder of claim 9, wherein the heat treatment is performed in a reducing environment at from about 300° C. to about 1,000° C., in the step (c). ### Claim 13 (depends on 9) The preparation method of graphene/ceramic nanocomposite powder of claim 9, further comprising: drying the reaction mixture at a temperature in a range of from about 70° C. to about 100° C. prior to the step (c). ### Claim 14 (depends on 9) A preparation method of a graphene/ceramic nanocomposite material, comprising: sintering the graphene/ceramic nanocomposite powder prepared according to the method of claim 9 at a temperature in a range of from about 50% to about 80% of the melting point of the matrix ceramic to form a bulk material.