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What is atomized powdered copper?
atomized Copper Powder will be further processed with electrolytic copper. It is a spherical or cylindrical powder that is irregularly shaped, rose red, and dendritic. It is easily oxidized in humid air. It can also be dissolved in hot sulfuric and nitric acid. Low bulk density. Good formability. Long storage time. Uses: Used in powder metal products, friction products, conductive inks electrical carbon products chemical contacts, diamonds products, electrical alloys, and other industries. Copper powders in spherical or spherical form have a very high bulk density. It is widely applied in industries such as injection molding and welding materials.
Atomized copper powder manufacturing process
Electrolytic copper plate-smelting-water (gas) atomization-vacuum drying-high temperature oxidation-crushing-reduction-crushing-classification
Smelt
Copper must be melted with impurities under strict control to achieve a powder that is fluid and has a high melting point.
Conductivity.
In an electric arc heater or intermediate frequency oven, the normal operating temperature is 1150-1200degC. Before the atomization, the smelting step is of paramount importance. Copper smelting is controlled to reduce the density of the powder.
Atomization
The industrial production of copper powder can be divided into two types, namely the gas atomization technique and the water atomization technique. The only difference between the two is that they use different atomizing agents, although the principle of powder production is the exact same. Air atomization or argon can be divided according to different gas media. Supersonic Atomization is also used to get finer powder.
In practice, water atomization has proven to have a better effect than gas atomization.
Reduction
The reduction process involves a relatively simple reduction. The temperature ranges from 400 to 600 degrees and the time period is between 60 and 120 minutes. During atomization, some oxygen is oxidized and gets into the particles. The other part turns to copper oxide. For oxygen to be removed, a high reduction temperature is required. This temperature will cause copper to naturally sinter, which means that large blocks of sintered copper must be ground. This new water mist method eliminates the need for the reduction stage, which saves energy and speeds up the process.
Antioxidant treatment
The surface of the powdered copper can absorb the water vapor from the air and form a thin water film. The thick film of water that is formed on the surface particles prevents oxygen from entering the space between the particles. This results in a low oxygen concentration and little oxygen infiltration. Copper powder is a result of this. The battery effect causes the copper powder to gradually oxidize. After being treated by antioxidants, copper powder’s surface is adsorbent and covered with film. This produces an antioxidation and can prolong the service life. Benzotriazole(BTA), gelatin, and the protein hydrolyzate are all good corrosion inhibitors for water atomized Copper powder.
(aka. Technology Co. Ltd., a global chemical materials supplier and manufacturer with more than 12 years experience, is a trusted source for high-quality nanomaterials and chemicals. The Copper powder that we produce is of high purity with a fine particle size. If you need lower, please call us.