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Carbon material forming process and formed part

A molding process and carbon material technology, applied in the field of graphite, can solve problems such as no literature reports, low porosity, high electrical conductivity, etc., and achieve the effect of reduced porosity, low porosity, and excellent performance.

Active Publication Date: 2015-02-04
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, how to use the prepared graphene powder or film to form a graphene product with a certain shape, high electrical conductivity, high thermal conductivity, low porosity, and low cost is still a difficult problem to be solved.
And so far, there are no literature reports

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] (1) Apply an electric field near the mold of the injection molding machine with an electric field strength of 20kv / m; mix 100 parts of graphite powder with a particle size of 20 μm, 100 parts of barium powder with a particle size of 20 μm, and 200 parts of a binder to form The homogeneous feed is put into the injection molding machine for injection molding to obtain a graphite injection molding blank; wherein the binder is composed of 50 parts of paraffin wax and 50 parts of low-density polyethylene.

[0065] (2) Put the graphite injection molding blank in the furnace, heat at 200°C for 1 hour, and dewax;

[0066] (3) Under the protection of hydrogen, pre-fire the dewaxed graphite injection molded blank at three stages of temperature, keep it at 200°C for 180 minutes, heat it up to 300°C for 120 minutes, and heat it up to 600°C for 100 minutes; remove the graphite injection molded blank The remainder of the binder component is then heated up to 1000°C, kept for 2 hours,...

Embodiment 2

[0070] (1) Apply an electric field near the mold of the injection molding machine with an electric field strength of 100kv / m; mix 100 parts of conductive carbon black powder with a particle size of 10 μm, 50 parts of iron powder with a particle size of 10 μm, and 150 parts of binder Mixed into a homogeneous feed, then put it into an injection molding machine for injection molding to obtain a conductive carbon black injection molding; the binder is composed of 20 parts of polypropylene, 10 parts of paraffin wax, 68 parts of carnauba wax, and 1 part of stearic acid .

[0071] (2) Place the conductive carbon black injection molding blank in a furnace, heat at 170°C for 1 hour, and dewax;

[0072] (3) Under an argon protective atmosphere, pre-fire the dewaxed conductive carbon black injection molding preform at three stages of temperature, keep it at 250°C for 60 minutes, 400°C for 80 minutes, and 700°C for 100 minutes; remove the conductive carbon black for injection molding The...

Embodiment 3

[0076] (1) Apply an electric field near the mold of the injection molding machine with an electric field strength of 200kv / m; mix 100 parts of graphite powder with a particle size of 1 μm, 10 parts of manganese powder with a particle size of 1 μm, and 100 parts of binder to form Homogeneous feeding material is put into an injection molding machine for injection molding to obtain a graphite injection molding blank; the binder is composed of 10 parts of ethylene-vinyl acetate copolymer, 79 parts of paraffin wax, 10 parts of carnauba wax, and 1 part of stearic acid.

[0077] (2) Put the graphite injection molding blank in the furnace, heat at 170°C for 10h, and dewax;

[0078] (3) Pre-fire the dewaxed graphite injection molded blank at three stages of temperature, keep it at 300°C for 30 minutes, 500°C for 60 minutes, and 800°C for 180 minutes; remove the remaining binder components in the graphite injection molded blank;

[0079] (4) In an argon protective atmosphere, heat up t...

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Abstract

The invention discloses a carbon material forming process and a formed part. The carbon material forming process comprises the following steps: (1) mixing and granulating carbon material powder and a binding agent; (2) injection-molding to obtain an injection-molded carbon material blank; (3) conducting dewaxing treatment; (4) pre-sintering at 200-800 DEG C and completely removing the binding agent to obtain a pre-sintered blank; and (5) continuously warming up to 1000-2500 DEG C in a protective atmosphere and sintering the pre-sintered blank; and preserving heat for 1-10h to obtain a sintered part. The process disclosed by the invention, by conducting dewaxing treatment on the injection-molded carbon material blank firstly, then pre-sintering stably and slowly at temperature of three stages and completely removing the binding agent added to the carbon material, can improve subsequent sintering, reduce porosity of the part as well as improve heat conductivity, electrical conductivity and overall appearance quality of the part material.

Description

technical field [0001] The invention relates to the technical field of graphite, in particular to a carbon material forming process and a formed part. [0002] Background technique [0003] The common graphite is formed by stacking layers of planar carbon atoms arranged in a honeycomb order, while the interlayer force of graphite is weak, and it is easy to peel off each other to form thin graphite sheets. When the graphite sheet is peeled off into a single layer, this single layer with a thickness of only one carbon atom is graphene. Graphene has long been considered a hypothetical structure that cannot exist on its own. Until 2004, British physicists Andre Geim and Konstantin Roo Shlov successfully separated graphene from graphite in experiments, thus confirming that it can exist alone. Jointly awarded the 2010 Nobel Prize in Physics for groundbreaking experiments on two-dimensional graphene. [0004] The appearance of graphene has stirred up huge waves in the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/532C01B31/02C01B31/04
Inventor 杨桂生姚晨光李万里
Owner HEFEI GENIUS NEW MATERIALS
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