Novel treatment method for anti-oxidation of carbon materials

A carbon material and treatment method technology, applied in the preparation/purification of carbon, graphite, etc., can solve the problems of unsatisfactory anti-oxidation performance, long impregnation time, low impregnation efficiency, etc., achieve good anti-oxidation effect, low cost, The effect of high impregnation efficiency

Inactive Publication Date: 2012-08-22
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Improving the oxidation resistance of carbon materials through the impregnation process has the advantage of simple operation, but the existing impregnation process has low impregnation efficiency, long impregnation time, unsatisfactory oxidation resistance and high energy consumption.

Method used

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  • Novel treatment method for anti-oxidation of carbon materials
  • Novel treatment method for anti-oxidation of carbon materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Boric acid (30%) is put into container, and vacuum heating boils, and vacuum degree is 0.9atm. After boiling, put the graphite anode with the size of 2000mm×150mm×2500mm into the impregnating melt, boil and impregnate for 30min, take out the carbon material and cool it down. The 750°C oxidation resistance of graphite anode after boiling impregnation is 100 times higher than that of unimpregnated graphite anode.

Embodiment 2

[0030] Boric acid (30wt%) is put into container, and concentration is that 20g / l sodium borate is put into boric acid, after stirring evenly, vacuum heating boils, and vacuum degree is 0.9atm. Put the carbon fiber into the impregnating melt, boil and impregnate for 30 minutes, take out the carbon fiber and cool it down. The 700°C oxidation resistance of impregnated carbon fiber is 120 times higher than that without impregnation.

Embodiment 3

[0032] Phosphoric acid (85wt%) was put into the container and heated to boil. After boiling, put the aluminum electrolytic carbon anode with a size of 2000mm×1000mm×2500mm into the impregnation solution, boil and impregnate for 60min, and then take out the carbon anode material and cool it down. The 900°C oxidation resistance of the impregnated carbon anode is 20 times higher than that of the unimpregnated carbon anode.

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Abstract

The invention relates to a novel treatment method for improving anti-oxidation of carbon materials, which is characterized by including the detailed steps: placing the carbon materials into water solution after the water solution is heated to boil, or individually heating solute to boil without solvent water prior to adding the carbon materials; impregnating the carbon materials in impregnating solution by means of boiling; and finally taking the carbon materials out for cooling. The novel treatment method has the advantages that perfect impregnating effect is achieved by means of combination of a porous structure and the boiling principle of the carbon materials, and is simple in process, high in impregnating efficiency, low in energy consumption and high in anti-oxidation effect.

Description

【Technical field】 [0001] The invention relates to the technical field of carbon materials, in particular to a novel anti-oxidation treatment method for carbon materials. 【Background technique】 [0002] Carbon materials are inorganic non-metallic materials dominated by carbon elements, usually composed of graphite microcrystals, layered crystals with hexagonal planar grids between carbon atoms. Because carbon materials have higher thermal conductivity than some metals, a much lower thermal expansion coefficient than metals, and high chemical stability, they are of great value in engineering. At room temperature, carbon materials do not react with various gases. When the temperature rises to 350°C, there is an obvious oxidation reaction of amorphous carbon, and the oxidation reaction of graphite also begins to occur when the temperature continues to rise to 400°C. As the temperature increases, the oxidation rate of graphite accelerates. The higher the degree of graphitizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50C01B31/00C01B32/05C01B32/21
Inventor 路贵民张灿于建国孙泽王榕艳岑吉祥宋兴福
Owner EAST CHINA UNIV OF SCI & TECH
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