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High-strength carbon-based material based on combustion synthesis of graphene and preparation method of high-strength carbon-based material

A technology for combustion synthesis and carbon-based materials, applied in the field of carbon-based materials, it can solve the problems of poor mechanical properties of materials and complex preparation processes, and achieve excellent isotropy, high reactivity, and rich edges.

Active Publication Date: 2022-07-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention aims to solve the problems of complex preparation process and poor mechanical properties of existing carbon-based materials, and provides a method for preparing isotropic high-strength carbon-based materials based on combustion synthesis of graphene

Method used

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  • High-strength carbon-based material based on combustion synthesis of graphene and preparation method of high-strength carbon-based material
  • High-strength carbon-based material based on combustion synthesis of graphene and preparation method of high-strength carbon-based material
  • High-strength carbon-based material based on combustion synthesis of graphene and preparation method of high-strength carbon-based material

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Experimental program
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Effect test

Embodiment 1

[0058] The reactants were weighed according to the weight ratio of magnesium powder and calcium carbonate at 24:50, mixed evenly, and put into a ceramic boat. According to 0.5L.s -1 The flow rate is passed into the protective atmosphere of carbon dioxide, and after the protective gas is filled, ignition starts to cause a self-propagating combustion reaction. The ignition device adopts a DC voltage stabilized power supply with a resistance wire, and the self-propagating combustion reaction is caused by setting the current of the DC voltage stabilized power supply to make the end of the resistance wire heat up. After the combustion synthesis reaction is completed, the introduction of carbon dioxide gas is stopped, cooled to room temperature, the reaction product is taken out, the combustion powder is repeatedly washed with hydrochloric acid, and dried to obtain combustion synthesis graphene powder. In parts by weight, weigh 6 parts of burning synthetic graphene, put it into a z...

Embodiment 2

[0060] The reactants were weighed according to the weight ratio of magnesium powder, calcium carbonate, and phosphorus pentoxide at 24:50:6, mixed evenly, and placed in a ceramic boat. According to 0.5L.s -1 The flow rate is passed into the protective atmosphere of carbon dioxide, and after the protective gas is filled, ignition starts to cause a self-propagating combustion reaction. After the combustion synthesis reaction is completed, the introduction of carbon dioxide gas is stopped, cooled to room temperature, the reaction product is taken out, the powder after combustion is repeatedly washed with hydrochloric acid, and dried to obtain phosphorus-doped combustion synthesis graphene powder.

[0061] In parts by weight, weigh 10 parts of phosphorus-doped combustion-synthesized graphene, and put it into a zirconia tank together with 90 parts of zirconia balls. Ball milled for 48 hours at 300 rpm. After the ball milling is completed, the zirconia balls are screened out to ob...

Embodiment 3

[0063] Weigh urea, magnesium powder and calcium carbonate in a weight ratio of 8:24:50, mix them evenly, and put them into a ceramic boat after mixing them evenly. According to 0.5L.s -1 The flow rate is passed into the protective atmosphere of carbon dioxide, and after the protective gas is filled, ignition starts to cause a self-propagating combustion reaction. After the combustion synthesis reaction is completed, the introduction of carbon dioxide gas is stopped, cooled to room temperature, the reaction product is taken out, the powder after combustion is repeatedly washed with hydrochloric acid, and dried to obtain a nitrogen-doped combustion synthesis graphene powder. In parts by weight, 5 parts of nitrogen-doped and combusted graphene were weighed and sintered by vacuum hot pressing, the sintering temperature was 1400° C., the sintering pressure was 40 MPa, and the sintering time was 10 min to prepare a carbon-based composite material. The flexural strength was tested t...

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Abstract

The invention discloses a high-strength carbon-based material based on combustion synthesis of graphene and a preparation method, and belongs to the field of carbon-based materials. The invention aims to solve the problems of complex preparation process and poor mechanical property of the existing carbon-based material. Graphene or doped graphene prepared by a high-temperature self-propagating combustion synthesis method is used as a raw material, and the isotropic high-strength carbon-based material is prepared through high-temperature sintering. The method disclosed by the invention is relatively simple to operate and easy for batch production, and the prepared carbon-based material has the advantages of high strength, electric conduction, heat conduction, light weight and the like, and can be used as nuclear graphite, a tool electrode for electric spark machining, a structural material for rocket technology, an ultrahigh-power electrode, a high-heat-conduction heat dissipation component, a high-performance crucible, a high-temperature high-performance mold and the like.

Description

technical field [0001] The invention belongs to the field of carbon-based materials, and in particular relates to a high-strength carbon-based material based on combustion-synthesized graphene and a preparation method. Background technique [0002] Carbon-based materials are materials with carbon as the main component, which can be divided into two categories: pure carbon materials (such as graphite, diamond, carbon fiber, etc.) and carbon-based composite materials (such as resin carbon or vapor-deposited carbon, graphite, etc. as the matrix) , carbon fiber, carbon nanotube, graphene, diamond, etc. are carbon composite materials made of reinforcements, etc.). Graphene is a two-dimensional nanomaterial composed of carbon atoms. It has ultra-high mechanical properties, Young's modulus and tensile strength as high as 1TPa and 130GPa, respectively, superior electrical and thermal conductivity, and large specific surface area. Therefore, graphene materials have great potential f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/528C04B35/622
CPCC04B35/522C04B35/622C04B2235/425C04B2235/666C04B2235/6581C04B2235/656C04B2235/6567C04B2235/96
Inventor 王黎东李杰王永康刘斌费维栋
Owner HARBIN INST OF TECH
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