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Method and device for continuous preparation of graphene powder

A graphene powder and equipment technology, applied in the field of continuous graphene powder preparation, can solve the problems such as inability to achieve continuous preparation, unsatisfactory graphene powder purity, crystallinity, and defect convenience, and achieve less defects, good crystallinity, high purity effect

Inactive Publication Date: 2019-01-29
WUHAN PUDI VACUUM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The graphite arc method prepares graphene powder by applying a large current between two graphite electrodes to form a plasma arc discharge, which generates a high temperature of more than 3000 degrees in the arc area, so that the graphite electrode is gasified, and the gaseous carbon atoms undergo a series of chemical and physical processes. process, the graphene powder material is generated on the inner wall of the discharge chamber, but the purity, crystallinity, and defect convenience of the graphene powder prepared in the prior art are not ideal, and continuous preparation cannot be realized. Therefore, we propose a continuous graphene powder Powder preparation method and equipment thereof

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  • Method and device for continuous preparation of graphene powder

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Effect test

Embodiment 1

[0029] The present invention also provides a continuous graphene powder preparation method, comprising the steps of:

[0030] S1. First, evacuate the double-layer water-cooled vacuum chamber 1 to 0.8 Pa, open the second gas valve 25, and pass the required working gases hydrogen and helium into the gas mixing chamber through the hydrogen replenishment pipe 23 and the helium replenishment pipe 24 2, use the third air valve 31 equipped with the cavity vacuum interface 12 to adjust the pumping speed, so that the pressure in the cavity is maintained at -70KPa;

[0031] S2. After completing S1, open the first gas valve 22 and the fourth gas valve 41, and turn on the gas circulation pump 4 to circulate the gas inside the double-layer water-cooled vacuum chamber 1. This operation makes the gas inside the double-layer water-cooled vacuum chamber 1 More evenly, at the same time, the cooling water inlet 15 outside the double-layer water-cooled vacuum chamber 1 is connected to the tap wat...

Embodiment 2

[0035] The present invention also provides a continuous graphene powder preparation method, comprising the steps of:

[0036] S1. First, evacuate the double-layer water-cooled vacuum chamber 1 to 1Pa, open the second gas valve 25, and pass the required working gases hydrogen and helium into the gas mixing chamber 2 through the hydrogen replenishment pipe 23 and the helium replenishment pipe 24 Inside, use the third air valve 31 equipped with the cavity vacuum interface 12 to adjust the pumping speed, so that the pressure in the cavity is maintained at -75KPa;

[0037] S2. After completing S1, open the first gas valve 22 and the fourth gas valve 41, and turn on the gas circulation pump 4 to circulate the gas inside the double-layer water-cooled vacuum chamber 1. This operation makes the gas inside the double-layer water-cooled vacuum chamber 1 More evenly, at the same time, the cooling water inlet 15 outside the double-layer water-cooled vacuum chamber 1 is connected to the tap...

Embodiment 3

[0041] The present invention also provides a continuous graphene powder preparation method, comprising the steps of:

[0042] S1. First, evacuate the double-layer water-cooled vacuum chamber 1 to 1.2Pa, open the second gas valve 25, and pass the required working gases hydrogen and helium into the gas mixing chamber through the hydrogen replenishment pipe 23 and the helium replenishment pipe 24 2, use the third air valve 31 equipped with the cavity vacuum interface 12 to adjust the pumping speed, so that the pressure in the cavity is maintained at -80KPa;

[0043] S2. After completing S1, open the first gas valve 22 and the fourth gas valve 41, and turn on the gas circulation pump 4 to circulate the gas inside the double-layer water-cooled vacuum chamber 1. This operation makes the gas inside the double-layer water-cooled vacuum chamber 1 More evenly, at the same time, the cooling water inlet 15 outside the double-layer water-cooled vacuum chamber 1 is connected to the tap wate...

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Abstract

The invention relates to the technical field of preparation of carbon nanometer materials, specifically to a device used in a method for continuous preparation of graphene powder. The device comprisesa double-layer water-cooled vacuum cavity, wherein the top part of the double-layer water-cooled vacuum cavity is fixedly connected with a gas mixing chamber; the top part of the gas mixing chamber is provided with an internal gas circulating interface; the bottom part of the double-layer water-cooled vacuum cavity is connected with a vacuum pump and a gas circulating pump; the gas outlet end ofthe gas circulating pump is connected with the internal gas circulating interface; two sides of the double-layer water-cooled vacuum cavity are respectively penetrated by a cathode graphite rod and ananode graphite rod; the outer end of the cathode graphite rod is fixedly provided with a cathode electrical connection element; the outer end of the anode graphite rod is fixedly provided with an anode electrical connection element; and the lower parts of the cathode electrical connection element and the anode electrical connection element are respectively provided with an automatic feeding mechanism. The invention also provides the method for continuous preparation of the graphene powder. The graphene powder prepared by using the device and the method provided by the invention has high purity, good crystallinity and few defects, and realizes continuous preparation of the graphene powder.

Description

technical field [0001] The invention relates to the technical field of carbon nanomaterial preparation, in particular to a continuous graphene powder preparation method and equipment thereof. Background technique [0002] Since its appearance in 2004, graphene has attracted great interest and widespread attention from scientists. The graphene powder prepared by the arc method has the characteristics of high cost performance, simple equipment operation, high purity and few defects. [0003] The graphite arc method prepares graphene powder by applying a large current between two graphite electrodes to form a plasma arc discharge, which generates a high temperature of more than 3000 degrees in the arc area, so that the graphite electrode is gasified, and the gaseous carbon atoms undergo a series of chemical and physical processes. process, the graphene powder material is generated on the inner wall of the discharge chamber, but the purity, crystallinity, and defect convenience...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184
CPCC01B32/184C01B2204/30
Inventor 周焱文
Owner WUHAN PUDI VACUUM TECH CO LTD