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Graphene and oxide ceramic composite material and preparation method

A technology of oxide ceramics and composite materials, which is applied in the field of graphene and oxide ceramic composite materials and preparation, can solve the problems of interface bonding and other problems, and achieve the effects of enhanced strength, low preparation cost, and simple preparation process

Inactive Publication Date: 2012-07-25
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Traditional ceramic composite materials are based on fiber materials such as carbon fiber, glass fiber and silicon carbide as reinforcements. These fiber materials generally have a diameter of several microns or tens of microns, and there are problems such as interfacial bonding with the ceramic matrix.

Method used

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  • Graphene and oxide ceramic composite material and preparation method
  • Graphene and oxide ceramic composite material and preparation method
  • Graphene and oxide ceramic composite material and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Prepare high-purity graphite oxide (G.I.Titelman, V.Gelman, S.Bron, et al.Characteristics and microstructure of aqueous collagen dispersions of graphite oxide) with improved Hummer method. Weigh 4g of zirconia powder and 0.3g of graphite oxide, add them to 40ml of absolute ethanol, and disperse them ultrasonically for 1 hour to obtain a dispersion of graphite oxide and zirconia. Ball mill them at a speed of 800r / min for 6 hours. After ball milling, pour the mixture into a beaker for 65 ℃ water bath for 24 hours to obtain a free-flowing powder, which was ground to obtain a powder. Weigh ~0.4g, and dry press with 60MPa pressure to obtain a green body. Put the green body into a vacuum tube furnace (Shenyang Kejing Equipment Manufacturing Co., Ltd., GSL-1600X), maintain an argon atmosphere, heat up to 1300°C for 2 hours at 5°C / min, cool down to room temperature naturally, take out the graphene and oxidize Zirconium ceramic composite. Using scanning electron ...

Embodiment 2

[0025] Embodiment 2: Using the same method as in Example 1, the addition of graphite oxide is 0.5g, and pyrolyzed to obtain graphene and zirconia ceramic composite material. The measured conductivity is 429.26S / m.

Embodiment 3

[0026] Embodiment 3: Using the same method as in Example 1, the addition of graphite oxide is 0.8g, and pyrolyzed to obtain graphene and zirconia ceramic composite material.

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Abstract

The invention relates to a graphene and oxide ceramic composite material and a preparation method. Graphite oxide is used as a graphene precursor, the graphite oxide is mixed with zirconium oxide ceramic powder according to a certain proportion, and the mixture is molded and sintered so as to form the graphene and oxide ceramic composite material. The graphene and oxide ceramic composite material has a nanometer composite structure with network connections, nanometer layered graphene is uniformly distributed on a ceramic matrix to form the nanometer composite structure, the nanometer composite structure is conductive to strengthening of strength of the ceramic and endows the ceramic with the functional characteristics of semiconductor, electric conduction, heat conduction, electrochemistry, and the like, and the composite material can be used for developing sensors, electromagnetic shielding, electric heating devices, heat conduction materials, energy-storage electrodes, and the like and is used for the fields of aerospace, electronics, chemical engineering and energy sources. The graphene and oxide ceramic composite material is formed by one step in the sintering process, does not need the processes of functionalizing, mixing and the like, is simple in preparation process and is suitable for large-scale production.

Description

technical field [0001] The invention relates to a graphene and oxide ceramic composite material and a preparation method, belonging to the technical field of material preparation. Background technique [0002] Ceramic matrix composites have low density, high hardness, oxidation resistance, wear resistance, corrosion resistance and excellent high temperature performance. As light high temperature materials, wear resistance and corrosion resistance materials, catalyst carriers, etc. It has a wide range of applications in the fields of chemical industry, energy and environment. Graphene is a two-dimensional nanomaterial composed of graphite layers connected by hexagonal carbon atoms. It has high specific surface area, high strength, high modulus, high electrical conductivity, high thermal conductivity, electrochemical performance and other functional properties. Its unique two-dimensional nanostructure , Excellent mechanical, physical and functional properties make it have imp...

Claims

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Application Information

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IPC IPC(8): C04B35/01C04B35/48C04B35/622
Inventor 李亚利殷正娥张赫
Owner TIANJIN UNIV
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