Ceramic with spatial three-dimensional conductive network structure and preparation method thereof

A technology of network structure and ordered structure, which is applied in the field of preparation of composite conductive ceramic materials, can solve problems such as mismatching of mechanical properties and electrical conductivity, reduction of mechanical properties of composite materials, improvement of electrical conductivity of non-conductive network lines, etc.

Active Publication Date: 2018-11-06
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current traditional production process is to add a large amount of graphite to the ceramic powder and then mix and cast it. This not only reduces the mechanical properties of the composite material compared with the original matrix material, but

Method used

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  • Ceramic with spatial three-dimensional conductive network structure and preparation method thereof
  • Ceramic with spatial three-dimensional conductive network structure and preparation method thereof
  • Ceramic with spatial three-dimensional conductive network structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Al provided 2 O 3 , CuO, MgO powder, SiO 2 Powder, TiO 2 The purity of the raw materials of the powder is greater than 99.0%. The mass fraction of graphite is 15%-25% of the ceramic powder, the purity of the graphite is greater than 99.85%, and the particle size is less than or equal to 50 μm.

[0024] 1) Preparation of graphite skeleton: the flake graphite powder, SiC powder and bonding powder are mixed in a ratio of 6:1:3, and the laser sintering 3D printer is used to print the graphite skeleton drawing according to the designed three-dimensional ordered structure of graphite. The skeleton is a diamond structure, with good stability and strength, and good three-dimensional hierarchical connection. The frame size is 1mm (diameter), the side length is 4mm, the structure is like figure 1 , image 3 Shown. Then the graphite skeleton is impregnated with phenolic resin and epoxy resin to increase the strength and carbonization of the graphite skeleton to improve its stability...

Embodiment 2

[0031] Al provided 2 O 3 , CuO, MgO powder, SiO 2 Powder, TiO 2 The raw material purity of the powder is greater than 99.0%. The mass fraction of graphite is 15%-25% of the ceramic powder, the purity of the graphite is greater than 99.85%, and the particle size is less than or equal to 50 μm.

[0032] 1) Preparation of graphite skeleton: the flake graphite powder, SiC powder and bonding powder are mixed in a ratio of 6:1:3, and the laser sintering 3D printer is used to print the graphite skeleton drawing according to the designed three-dimensional ordered structure of graphite. The skeleton is composed of three basic layers. The three basic layers are arranged by graphite structures on different sides, which are superimposed to form a honeycomb structure. A single Y-shaped frame has a size of 1mm (width), a height of 1mm, and a side length of 2mm, such as figure 2 , 4 and 5. Then the graphite skeleton is impregnated with phenolic resin and epoxy resin to increase the strength a...

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Abstract

The invention discloses a ceramic with a spatial three-dimensional conductive network structure and a preparation method thereof, and belongs to the field of preparation of conductive materials. The preparation method mainly includes four steps of designing and strengthening treatment of a graphite framework three-dimensional structure, preparation of ceramic slurry, pouring process and drying andsintering process. A graphite/alumina ceramic composite material prepared by the method can be directly prepared by control of the composition, the size structure and post-treatment of the graphite and the improvement of the sintering process and the drying process. Under the premise that the conductivity is improved, the mechanical properties are guaranteed to achieve on-demand distribution of the graphite. The graphite/alumina ceramic composite material can have the conductivity of the graphite and structure characteristics of the ceramic, such as chemical stability, high temperature resistance, oxidation resistance, radiation resistance, corrosion resistance and the like, thereby having broad application prospects.

Description

Technical field [0001] The invention belongs to the field of conductive material preparation, and specifically relates to a method for preparing a composite conductive ceramic material. Background technique [0002] Conductive carbon materials such as carbon nanotubes, graphene, carbon fibers, etc. are good conductors of electricity, and have acid and alkali resistance, high melting point, non-toxic, radiation resistance, sufficient raw materials, and low prices. In recent years, it is a commonly used conductive filler for conductive composite materials. Therefore, the composite material made of graphite and alumina ceramics can have graphite conductivity and the structural characteristics of ceramics, such as stable chemical properties, high temperature resistance, corrosion resistance, oxidation resistance, etc., which has broad prospects. However, the current traditional production process is made by adding a large amount of graphite to the ceramic powder and then mixing and ...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/78
CPCC04B35/10C04B35/78C04B2235/3201C04B2235/3206C04B2235/3232C04B2235/3281C04B2235/3418C04B2235/425C04B2235/602C04B2235/6562C04B2235/96
Inventor 叶喜葱林咸参肖克强曹如心吴海华
Owner CHINA THREE GORGES UNIV
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