Production Process of Atomized Copper Powder

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What does atomized copper powder mean?

Further processing of the atomized Copper powder involves electrolytic copper. The powder can be described as a light red, dendritic and irregularly packed, spherical, or spherical. It can be easily oxidized in humid air. Good formability, low bulk density, and long shelf life. This product is used extensively in powder metallurgy, friction, inks and electrical carbon products. It can also be used for chemical contacts, powder metallurgy, electronic alloys and diamond products. High bulk density is a characteristic of spherical or spherical Copper powder. It’s widely used in electronic manufacturing, injection molding and welding.

Process for producing atomized copper powder

Electrolytic copper plate-smelting-water (gas) atomization-vacuum drying-high temperature oxidation-crushing-reduction-crushing-classification


Controlling the impurities during the copper melting process is essential to assure that the final powder exhibits good fluidity.


Heat to 1150-1200degC with an intermediate frequency furnace, electric arc furnace, or in a normal setting. The most critical step before the atomization is smelting. It is possible to control the copper smelting procedure and reduce bulk density.

There are two main types of industrialized production methods for atomizing copper powder: the gas and water atomization methods. There is a difference in the atomizing media used, however the process of creating powder remains the same. You can divide it into two types depending on which gas media you use: argon or air atomization. To obtain finer powder, supersonic Atomization is also used.

The effect of water-atomization on gas atomization was proven superior to that of gas atomization.


Reduction is simple. It takes 60 to 120 minutes, with a temperature range of 400 to 600. Part of the oxygen in the atomization reaction is converted to copper oxide on the surface. This copper oxide penetrates inside the particles. It is necessary to reduce the temperature very quickly in order to remove oxygen. Copper will naturally sintered under this temperature, so grinding large quantities of sintered block is required. New water mist-oxidation methods can now eliminate the reduction step. It saves time and energy.
Antioxidant treatment

Thermodynamically, copper can be unstable in the atmosphere. Copper powder, particularly in humid conditions, will eventually oxidize in the environment. Because copper’s surface is easily absorbed water vapor from the air to create a water film, Because of the thick water film that forms on the surface, very little oxygen can be absorbed and thus the oxygen concentration is lower, it is a microanode. A micro-cathode occurs in the area with easy oxygen access. The copper powder exhibits a very low concentration. Due to the battery effect, copper powder gradually becomes oxidized. Antioxidants are applied to the copper powder, and the film is absorbed and coated. This creates an anti-oxidation effect, and extends the life of the material. Benzotriazole and soap liquid (BTA), gelatin and protein hydrolyzate are all good at inhibiting corrosion in water atomized from copper powder.
Buffalotours (aka. Buffalotours advanced materials. We are a global supplier of chemical materials and manufacturers with more than 12 year’s experience in manufacturing super-high quality chemicals. High purity, small particles size, and low impurity are the hallmarks of the Cu powder that our company produces. We can help you if your requirements are lower.

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