Method and device for preparing carbon-coated copper nano-particles by metal wire electric explosion method

Abstract

The invention discloses a method and device for preparing carbon-coated copper nano-particles by a metal wire electric explosion method. The method comprises the following steps: winding a carbon rodwith a copper wire with a certain length and a certain diameter uniformly; and applying high voltage and large current to the metal wire in argon atmosphere so that the electric explosion of metal wire occurs, and collecting the carbon-coated copper nano-particles. A copper metal is heated to cause phase transition in an electric explosion process; the copper metal is subjected to the processes ofmelting, gasifying, plasma and the like successively, and produces copper atoms under the high-temperature heating of the plasma; part of carbon atoms can be formed by the carbon rod after high current is applied, and then the copper atoms and the carbon atoms nucleate and condense into atom clusters spontaneously and uniformly from a gas phase and form initial small droplets; the droplets grow continuously, and then a carbon-coated layer is formed through two mechanisms, namely, internal carbon atom separating out and external carbon atom precipitation; and finally, the carbon-coated coppernano-particles are formed through cooling. The new method for preparing the carbon-coated copper nano-particles is provided, and has great application value in industrial production and scientific research.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of preparation of carbon-coated copper nanoparticles, and relates to a method and a device for preparing carbon-coated copper nanoparticles by using a wire electric explosion method. [0003] 【Background technique】 [0004] Metal nanoparticles have many advantages. However, due to their high energy content, they can easily react with gases and liquids in the environment or form clusters, which loses the advantages of nanoparticles. Therefore, after the carbon coating is introduced, the multi-layer graphite will be tightly coated on the periphery of the nano-metal particles, and the nano-metal is at the core position, that is, a new type of nano-carbon / metal composite material is formed through this shell / core structure, which can protect the metal nanoparticles. In addition to the original characteristics, endowed with unique electrical, optical, and magnetic properties, it has great application valu...

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Problems solved by technology

Most of these methods require complex production equipment, require high energy, and the products have many impurities or are dangerous, so they are greatly limited in practical application.

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