Technology and equipment for preparing magnetic carbon nanometer tube by plasma

A magnetic carbon nanotube and plasma technology, which is applied in the direction of plasma, inductor/transformer/magnet manufacturing, electrical components, etc., can solve the problems of high arc temperature and hinder the stable progress of the reaction system, so as to achieve cheap equipment and avoid structural defects , Environmentally friendly effect

Inactive Publication Date: 2004-11-17
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high arc temperature, the produced carbon nanotubes are sintered into one body, resulting in more defects
Moreover, it uses graphite rods as electrodes, and the distance between the electrodes must be constantly adjusted during the experiment, which hinders the stable progress of the reaction system.

Method used

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  • Technology and equipment for preparing magnetic carbon nanometer tube by plasma
  • Technology and equipment for preparing magnetic carbon nanometer tube by plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, the cooling water is passed into the cooling water pipe 2 at the top of the plasma reactor, flows through the cooling water jacket 7, and finally is discharged from the cooling water pipe 2 at the lower end of the plasma reactor. Argon gas is introduced into the plasma reactor from the inlet pipe 12 . A magnetic coil 10 is attached outside the reactor 9, and its magnetic field strength is kept at 70G. Turn on the power supply and adjust the current to 70A, and the discharge between the cathode 1 and the anode 4 will break down the argon gas flowing into the plasma reactor to generate a plasma jet. The plasma jet junction passes through the ceramic ring 5 and is bounded by the discharge channel 6 and extends into the reactor 9 . Methane is introduced into the reactor 9 from the hydrocarbon raw material inlet pipe 8, and the volume ratio of argon and methane is fed in at a ratio of 16:1. Methane fully contacts with the plasma jet in the reactor 9 under the oxygen...

Embodiment 2

[0019] Using the aforementioned manufacturing device, the cooling water is first passed into the cooling water pipe 2 at the top of the plasma reactor, flows through the cooling water jacket 7, and finally is discharged from the cooling water pipe 2 at the lower end of the plasma reactor. Argon gas is introduced into the plasma reactor from the inlet pipe 12 . A magnetic coil 10 is attached outside the reactor 9, and its magnetic field strength is kept at 100G. Turn on the power supply and adjust the current to 85A, and the discharge between the cathode 1 and the anode 4 will break down the argon gas flowing into the plasma reactor to generate a plasma jet. The plasma jet junction passes through the ceramic ring 5 and is bounded by the discharge channel 6 and extends into the reactor 9 . Methane is introduced into the reactor 9 from the hydrocarbon raw material inlet pipe 8, and the volume ratio of argon and methane is fed in at a ratio of 25:1. Methane fully contacts with t...

Embodiment 3

[0021] Using the aforementioned manufacturing device, the cooling water is first passed into the cooling water pipe 2 at the top of the plasma reactor, flows through the cooling water jacket 7, and finally is discharged from the cooling water pipe 2 at the lower end of the plasma reactor. Argon gas is introduced into the plasma reactor from the inlet pipe 12 . A magnetic coil 10 is attached outside the reactor 9, and its magnetic field strength is kept at 150G. Turn on the power supply and adjust the current to 90A, and the discharge between the cathode 1 and the anode 4 will break down the argon gas flowing into the plasma reactor to generate a plasma jet. The plasma jet junction passes through the ceramic ring 5 and is bounded by the discharge channel 6 and extends into the reactor 9 . Methane is introduced into the reactor 9 from the hydrocarbon raw material inlet pipe 8, and the volume ratio of argon and methane is fed in at a ratio of 30:1. Methane fully contacts with t...

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PUM

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Abstract

The invention is a technology for using plasma to produce the magnetic carbon nano pipe. The argon is blown into the plasma generator, there forms the plasma efflux under the effect of the current; the methane is blended with the plasma in condition without oxygen, it is ionized and decomposed into nano grade active carbon particles, and enters the reactor whose magnetism intensity if 70-200G, and uses the nickel sieve carrying load iron powder or ferric oxide powder to generate the magnetic carbon nano pipe. The structure is simple, the device is cheap, and it can avoid the structure deficiencies.

Description

Technical field: [0001] The invention belongs to a technology for preparing carbon nanotubes, in particular to a technology and device for preparing magnetic carbon nanotubes with plasma. Background technique: [0002] At present, there are many methods for preparing carbon nanotubes in the world, such as: ion or laser sputtering method, pyrolysis polymer method, solid-phase pyrolysis method, etc., and there is also a newly reported method of using solar energy to prepare carbon nanotubes. However, in the current relatively mature process chemical vapor deposition method, the proportion of tubular structure products in the crude carbon nanotube products prepared by this process is not high, the tube diameters are not uniform, and there are many crystal defects. At the same time, people also use the DC arc plasma method to prepare carbon nanotubes (such as "Massproduction of single-wall carbon nanotubes by the arc plasma jet method" Chem. Phys. Lett. 323 (2000) 580-585), on t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08H01F41/00H05H1/00
Inventor 王浩静梁新宇晁兵周立公
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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