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Preparation method of carbon-graphite composite material

A composite material, carbon-graphite technology, applied in the field of carbon-graphite composite material preparation, can solve the problems of low flexural and impact-resistant mechanical properties

Active Publication Date: 2015-05-27
SHANXI LIANGYU CARBON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another characteristic of brittle materials, high compressive strength, but low flexural and impact mechanical properties

Method used

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  • Preparation method of carbon-graphite composite material
  • Preparation method of carbon-graphite composite material
  • Preparation method of carbon-graphite composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example serves as a comparative example without adding chopped carbon fibers.

[0026] The ingredients are: ≤1mm microcrystalline graphite 5%, ≤0.075mm calcined petroleum coke 28%, 1~4mm calcined petroleum coke 15%, 4~l0mm electric calcined anthracite 10%, 10-16mm electric calcined anthracite 5%, 10-16mm Calcined pitch coke 15%, acetylene carbon black 2%, coal tar pitch 20%. Plus 1% T300PAN chopped carbon fiber (diameter 12μm, length 10mm).

[0027] (1) Ingredients and kneading, first add carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcined pitch coke into the kneader, the dry mixing time is 35 minutes, and the dry mixing temperature is 120°C; When the dry mixing temperature reaches the set time and temperature, add coal tar pitch at 175°C for wet mixing, the wet mixing time is 30 minutes, and the kneading temperature is 160°C to form a composite plastic body;

[0028] (2) Molding, the ...

Embodiment 2

[0039] The ingredients are: ≤1mm microcrystalline graphite 5%, ≤0.075mm calcined petroleum coke 28%, 1~4mm calcined petroleum coke 15%, 4~l0mm electric calcined anthracite 10%, 10-16mm electric calcined anthracite 5%, 10-16mm Calcined pitch coke 15%, acetylene carbon black 2%, coal tar pitch 20%. Plus 1% T300PAN chopped carbon fiber (diameter 12μm, length 10mm).

[0040] (1) Ingredients and kneading, first add carbon black, natural graphite, calcined petroleum coke powder, calcined petroleum coke, electric calcined anthracite and calcined pitch coke into the kneader, and then add chopped carbon fiber for dry mixing after an interval of 5-6 minutes , the dry mixing time is 35 minutes, and the dry mixing temperature is 120°C; when the dry mixing temperature reaches the set time and temperature, add coal tar pitch at 175°C for wet mixing, the wet mixing time is 30 minutes, and the kneading temperature is 160°C , forming a composite plastic body;

[0041] (2) Molding, the compos...

Embodiment 3

[0052] Using the same ingredients as in Example 2, plus 2% T300PAN chopped carbon fiber (diameter 12 μm, length 10 mm), the process is the same as in Example 1, and the measured performance indicators of the sample are shown in Table 3.

[0053] Table 3 The carbon material and graphite composite material quality index that embodiment 3 makes

[0054]

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Abstract

The invention relates to a preparation method of a carbon-graphite composite material. The preparation method is characterized in that the carbon-graphite composite material is prepared from the following raw materials in percentage by weight: 1.5-2.5% of carbon black, 5%-8% of graphite with the particle size smaller than or equal to 1mm, 25%-30% of calcined petroleum coke powder with the particle size smaller than or equal to 0.075mm, 15%-20% of calcined petroleum coke with the particle size of 1mm-4mm, 10%-15% of electric calcined anthracite with the particle size of 4mm-10mm, 5%-10% of electric calcined anthracite with the particle size of 10mm-16mm, 5%-15% of calcined pitch coke with the particle size of 10mm-16mm, 18%-20% of coal pitch and short carbon fiber, wherein short carbon fiber is equal to 1%-3% of total weight of the raw materials. The carbon-graphite composite material is prepared by the steps of material preparation, mixed kneading, forming, roasting and graphitization and is excellent in performance, high in breaking strength, relatively good in thermal shock resistance and relatively low in expansion factor; the carbon-graphite composite material does not crack and break and has good stability.

Description

technical field [0001] The invention relates to a method for preparing a carbon-graphite composite material, which belongs to the technical field of special inorganic non-metallic materials. Background technique [0002] Carbon graphite materials have a series of excellent characteristics such as low density, high strength, high temperature resistance, chemical corrosion resistance, radiation resistance, fatigue resistance, high electrical conductivity, high thermal conductivity, ablation resistance, small thermal expansion, and good physiological compatibility. There are more and more applications in all walks of life. [0003] Inorganic non-metallic materials are basically brittle materials, such as bricks, stones, ceramics, glass, cement concrete, and carbon materials. Another characteristic of brittle materials is high compressive strength but low flexural and impact mechanical properties. Most inorganic non-metallic materials (including carbon graphite materials) have...

Claims

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Application Information

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IPC IPC(8): C01B31/04
Inventor 张红亮
Owner SHANXI LIANGYU CARBON CO LTD
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