Method for preparing boron nano material through arc discharge

An arc discharge and nanomaterial technology, applied in the field of arc discharge preparation of boron nanomaterials, can solve the problems of low preparation efficiency, poor product purity, low yield, etc., and achieve the effects of simple process, high product purity, and large production.

Inactive Publication Date: 2016-07-06
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problems of poor product purity, low preparation efficiency and low output in the existing method for preparing nanomaterials by arc discharge, and to provide a method for preparing boron nanomaterials by arc discharge

Method used

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  • Method for preparing boron nano material through arc discharge

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Effect test

Embodiment 1

[0019] A method for preparing boron nanomaterials by arc discharge in this embodiment comprises the following steps:

[0020] (1) Prepare powder mixture: mix boron powder and tungsten powder in a volume ratio of 4:1 to obtain a powder mixture;

[0021] (2) Install a pure tungsten cathode and a mixed anode in the reaction chamber of the arc discharge device, and the mixed anode and the pure tungsten cathode are all connected to a power supply; the powder mixture prepared in step (1) is packed into a tungsten crucible, and the Hybrid electrodes made by machine compaction;

[0022] (3) evacuate the reaction chamber so that the air pressure in the reaction chamber is lower than 0.0001Pa, and then feed argon gas;

[0023] (4) Turn on the power supply for arc discharge, first adjust the initial current to 10 amperes, then adjust the distance between the pure tungsten cathode and the mixed anode, so that when the distance between the pure tungsten cathode and the mixed anode is 8mm,...

Embodiment 2

[0027] A method for preparing boron nanomaterials by arc discharge in this embodiment comprises the following steps:

[0028] (1) Prepare the powder mixture: mix boron powder and tungsten powder in a volume ratio of 1:1 to obtain a powder mixture;

[0029] (2) Install a pure tungsten cathode and a mixed anode in the reaction chamber of the arc discharge device, and the mixed anode and the pure tungsten cathode are all connected to a power supply; the powder mixture prepared in step (1) is packed into a tungsten crucible, and the Hybrid electrodes made by machine compaction;

[0030] (3) evacuate the reaction chamber so that the air pressure in the reaction chamber is lower than 0.0001Pa, and then feed argon gas;

[0031] (4) Turn on the power supply for arc discharge, first adjust the initial current to 10 amperes, then adjust the distance between the pure tungsten cathode and the mixed anode, so that when the distance between the pure tungsten cathode and the mixed anode is ...

Embodiment 3

[0034] A method for preparing boron nanomaterials by arc discharge in this embodiment comprises the following steps:

[0035] (1) Prepare the powder mixture: mix boron powder and tungsten powder at a volume ratio of 10:1 to obtain a powder mixture;

[0036] (2) Install a pure tungsten cathode and a mixed anode in the reaction chamber of the arc discharge device, and the mixed anode and the pure tungsten cathode are all connected to a power supply; the powder mixture prepared in step (1) is packed into a tungsten crucible, and the Hybrid electrodes made by machine compaction;

[0037] (3) evacuate the reaction chamber so that the air pressure in the reaction chamber is lower than 0.0001Pa, and then feed argon gas;

[0038] (4) Turn on the power supply for arc discharge, first adjust the initial current to 10 amperes, then adjust the distance between the pure tungsten cathode and the mixed anode, so that when the distance between the pure tungsten cathode and the mixed anode is...

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Abstract

The invention relates to a method for preparing a boron nano material through arc discharge, and belongs to a method for preparing a nano material. The invention mainly aims to solve the technical problems of poor product purity, low preparation efficiency and low production of the existing method for preparing a nano material through arc discharge. The technical scheme of the invention is that the method for preparing the boron nano material through arc discharge comprises the following steps: (1) mixing boron powder and high-boiling-point metal powder according to a volume ratio of (1-10):1 to prepare a powder mixture; (2) installing a pure tungsten negative electrode and a mixed positive electrode in a reaction cavity of an arc discharge device, wherein the mixed positive electrode and the pure tungsten negative electrode are connected with a power supply, and the mixed positive electrode is a mixed electrode prepared from a powder mixture and a tungsten crucible; (3) performing evacuation on the reaction cavity, and then introducing a working gas; (4) switching on a power supply to perform arc discharge, and keeping the discharge current and the voltage stable during discharge; and (5) after discharge, collecting a product in the reaction cavity under the protection of argon gas.

Description

technical field [0001] The invention relates to a method for preparing boron nanomaterials by arc discharge, which belongs to a method for preparing nanometer materials. Background technique [0002] Arc discharge is a commonly used method for preparing nanomaterials. Compared with laser ablation and chemical deposition, it is cheap and suitable for mass production, and has become the preferred method for preparing nanomaterials. At present, it has been widely used in the preparation of high-boiling carbon nanomaterials, including fullerenes, metallofullerenes, and carbon nanotubes. In the process of preparing carbon nanomaterials by arc discharge, conductive graphite electrodes or mixed graphite electrodes are used as carbon sources. In the arc discharge, the graphite electrode is used as a consumable anode and is vaporized and deposited under the high temperature generated by the arc to generate carbon nanomaterials. [0003] However, for boron materials with a high boi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/02B82Y40/00
CPCC01B35/023C01P2004/64
Inventor 吕海港陈强田文娟刘辉李思殿
Owner SHANXI UNIV
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