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A method of preparing carbon-coated aluminum nanoparticles using wire electric explosion method

A nanoparticle, electric explosion technology, applied in metal processing equipment, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as reducing the safety of device operation, and achieve high product generation rate and energy utilization rate. , Simple preparation, less by-products

Active Publication Date: 2021-08-13
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main way to prepare carbon-coated nanoparticles by silk explosion is electric explosion in carbon-containing medium. For example, an atmosphere containing a certain proportion of methane is used, but the explosion product will be mixed with hydrogen, which greatly reduces the safety of device operation.

Method used

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  • A method of preparing carbon-coated aluminum nanoparticles using wire electric explosion method
  • A method of preparing carbon-coated aluminum nanoparticles using wire electric explosion method
  • A method of preparing carbon-coated aluminum nanoparticles using wire electric explosion method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 (in single mode)

[0045] Step 1: Place the aluminum wire at the center of the carbon tube 1 with an inner diameter of 14mm, and fix the aluminum wire and the carbon tube 1 on the upper and lower electrodes of the electric explosion chamber;

[0046] Step 2: Seal the electric explosion chamber; after the electric explosion chamber is evacuated to a vacuum, it is filled with argon, and the air pressure is 100kPa;

[0047] Step 3: Charge the capacitor to the set voltage, trigger the switch, and discharge the capacitor through the metal wire 2 and the carbon tube 1;

[0048] Step 4: Place the aluminum wire in the carbon tube 1, and conduct an electric explosion experiment in an inert gas environment to obtain carbon-coated nanoparticles. The diameter of the carbon tube 1 is 14 mm; the argon gas in the electric explosion chamber is discharged, and the nanoparticles It is collected on the microporous filter membrane; multiple electric explosion experiments are car...

Embodiment 2

[0049] Example 2 (in single mode)

[0050] Step 1: Place the aluminum wire at the center of the carbon tube 1 with an inner diameter of 20mm, and fix the aluminum wire and the carbon tube 1 on the upper and lower electrodes of the electric explosion chamber;

[0051] Step 2: Seal the electric explosion chamber; after the electric explosion chamber is evacuated to a vacuum, it is filled with argon, and the air pressure is 100kPa;

[0052] Step 3: Charge the capacitor to the set voltage, trigger the switch, and discharge the capacitor through the metal wire 2 and the carbon tube 1;

[0053] Step 4: Place the aluminum wire in the carbon tube 1, and conduct an electric explosion experiment in an inert gas environment to obtain carbon-coated nanoparticles. The diameter of the carbon tube 1 is 20mm; discharge the argon gas in the electric explosion chamber, and the nanoparticles It is collected on the microporous filter membrane; multiple electric explosion experiments are carried ...

Embodiment 3

[0054] Example 3 (in single mode)

[0055] Step 1: Place the aluminum wire at the center of the carbon tube 1 with an inner diameter of 25mm, and fix the aluminum wire and the carbon tube 1 on the upper and lower electrodes of the electric explosion chamber;

[0056] Step 2: Seal the electric explosion chamber; after the electric explosion chamber is evacuated to a vacuum, it is filled with argon, and the air pressure is 100kPa;

[0057] Step 3: Charge the capacitor to the set voltage, trigger the switch, and discharge the capacitor through the metal wire 2 and the carbon tube 1;

[0058] Step 4: Place the aluminum wire in the carbon tube 1, and conduct an electric explosion experiment in an inert gas environment to obtain carbon-coated nanoparticles. The diameter of the carbon tube 1 is 25 mm; discharge the argon gas in the electric explosion chamber, and the nanoparticles It is collected on the microporous filter membrane; multiple electric explosion experiments are carried...

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Abstract

The invention discloses a method for preparing carbon-coated aluminum nanoparticles by using a metal wire electric explosion method. During the electric explosion process, the aluminum wire is heated and undergoes phase transformation, and successively undergoes processes such as melting, gasification, and plasma, and undergoes processes such as melting, gasification, and plasma. Aluminum atoms are produced under high-temperature heating, and some carbon atoms will also be formed after the carbon tube is passed through a high current. As the explosion products expand and cool, carbon and aluminum atoms jointly nucleate and grow through condensation and coagulation. During this process, carbon atoms are continuously precipitated from the grown aluminum-carbon mixed droplets, solidified on the particle surface, and finally form carbon-coated aluminum nanoparticles. At the same time, metal wires and carbon tubes are used to manufacture carbon-coated nanoparticles, and the wire-feeding mechanism can also be used to continuously feed wires to the middle of carbon tubes for electric explosion experiments, and carbon-coated nanoparticles can be prepared in repeating frequency mode. This method proposes a new method for preparing carbon-coated aluminum nanoparticles, which has great application value for industrial production and scientific research.

Description

technical field [0001] The invention belongs to the technical field of preparation of carbon-coated aluminum nanoparticles, and relates to a method for preparing carbon-coated aluminum nanoparticles by using a metal wire electric explosion method. Background technique [0002] Metal nanoparticles exhibit excellent properties in optical, electrical, magnetic, mechanical and other aspects, and have broad application prospects. However, for some metal materials with active chemical properties, such as aluminum and iron, contact with air during storage will cause rapid oxidation and greatly reduce their usability. Carbon coating of metal nanoparticles is a feasible way to enhance their oxidation resistance and achieve surface modification. Carbon-coated metal nanoparticles are a new type of nanoparticles composited by carbon and metal. By coating a layer of carbon atoms with a certain thickness on the metal nanoparticles, the two can form a unique shell / core structure. For so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/14B82Y40/00B82Y30/00
CPCB22F9/14B82Y40/00B82Y30/00B22F1/16
Inventor 吴坚李旭东石桓通刘超鹏陈立李兴文邱爱慈
Owner XI AN JIAOTONG UNIV
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