What is atomized powdered copper?
The atomized 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 acids. Low bulk density. Good formability. Long storage time. Widely used by powder metallurgy and friction products. Also, in electrical carbon products, chemical contact products, diamond products, electrical alloys, electrical alloys, etc. Copper powder is available in spherical or spherical shapes. They have a very high 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 most important step is smelting. 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 the gas medium. 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 60 to 120 minutes. During the process of atomization, some of the oxygen is converted to copper oxide on the surface. The other portion penetrates inside the particle and becomes oxidized. For oxygen to be removed, a high reduction temperature is required. This temperature will cause copper to naturally sinter, which is why it’s necessary to grind large quantities of sintered blocks. 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 water vapour in the atmosphere to 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 poor concentrate as a consequence. 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 effect, 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 trusted global chemical materials supplier & manufacture with more than 12 years experience in providing super-high quality chemicals and Nanomaterials. The Copper powder that we produce is of high purity with a fine particle size. If you need lower, please call us.