Method of preparing isotropic carbon material and prepared carbon material

A technology for isotropic carbon and mesophase carbon microspheres is applied in the field of high-strength, high-density isotropic fine-structure carbon materials, which can solve the problems of low product yield and easy cracking of products, and achieve excellent performance. , The effect of reducing process links and production cycle reduction

Active Publication Date: 2009-06-24
NINGBO SHANSHAN NEW MATERIAL TECH
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Problems solved by technology

The above method still has the following disadvantages: the cold isostatic pressing method is adopted, and the fine-grained mesophase carbon microsphere powder is used in order to increase the density of the product, and the product is prone to cracks during molding and roasting, and the product yield is low

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  • Method of preparing isotropic carbon material and prepared carbon material

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Embodiment 1～10

[0021] The relevant raw materials and their amounts in each embodiment, as well as the relevant process parameters of preforming, hot isostatic pressing and graphitization are shown in Table 1.

[0022] Table 1

[0023]

[0024] The following takes Example 5 as an example to specifically illustrate the preparation process of the present invention: ① Using self-baking mesocarbon microsphere powder (particle size 5-20μm) as raw material, pre-molding in a molding machine with a molding pressure of 25MPa; ② Successively Put 1 part (by weight, the same below) of carbon block green body and 3 parts of pitch impregnating agent into a hot isostatic press, using argon gas medium, heating and pressurizing, and maintaining temperature at 800℃ calcination temperature and 80MPa pressure 3 hours, then cool down naturally; ③The carbonized carbon block is graphitized at 2500°C in a graphitization furnace. The properties of the isotropic carbon materials are shown in Table 2.

[0025] Among them...

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PUM

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Abstract

The invention discloses a preparation method of an isotropic carbon material, which comprises the following steps: ① preforming with self-baking mesophase carbon microspheres as the main raw material; ② hot isostatic pressing; ③ graphitization. The present invention is different from the production method of the prior art, does not need to use any kind of binder, integrates pressing, impregnation and roasting, reduces the process steps, the product yield is high, and the production cycle can be greatly reduced; and The isotropic carbon material prepared by the present invention, especially the isotropic fine structure carbon material product has high density and high strength, its volume density reaches above 1.95g / cm3, its flexural strength is not less than 70MPa, and its compressive strength is not less than 150MPa .

Description

Technical field [0001] The invention relates to a carbon material and a manufacturing method thereof, in particular to a preparation method of an isotropic carbon material and the prepared carbon material, in particular to the prepared high-strength, high-density, isotropic fine-structure carbon material. Background technique [0002] Isotropic carbon material is a newly emerging important industrial raw material. Because of its conductivity and high temperature resistance, it is widely used in various fields of manufacturing, such as graphite electrodes for EDM machine tools in the mold industry, and metal continuous casting graphite in the metallurgical industry. Crystallizer, graphite crucible for Czochralski silicon and graphite for optical fiber production, etc. Especially the finely isotropic carbon material has good isotropy, and its characteristics have nothing to do with size, shape, and sampling direction; the structure is more uniform, dense, high mechanical strength, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 谢秋生杨晓光刘铁军李杰池淑芬
Owner NINGBO SHANSHAN NEW MATERIAL TECH
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