Copper powder is inexpensive and has a wide range of uses. Recently, many customers have inquired about copper powder, so how to choose copper powder? What kind of copper powder is more appropriate? The key is to look at the required performance and application. Commonly used copper powders can be roughly divided into spherical and quasi-spherical copper powders, dendritic copper powders, flake copper powders, nano copper wires and other copper powders with special morphologies.

The copper powder obtained by most methods of preparing copper powder is generally spherical/quasi-spherical (we define the powder with a certain distance from the periphery of the powder to the center as spherical/quasi-spherical powder), and spherical/quasi-spherical copper powder has low porosity And relative sliding friction coefficient, good expansion and ductility, good miscibility when mixed with other materials.

Dendritic copper powder refers to copper powder with a dendritic morphology. It has a more complex geometric structure and a larger surface roughness, so it has a larger specific surface area. The number of contact points where the copper powder particles contact each other is obvious. Increase, therefore, the use of the smallest amount of filler material can maximize the conductivity of the paste.

Flake copper powder is called flake copper powder. When copper powder is used as a conductive coating, the flake copper powder on the surface is more conducive to the conduction of electric charges, and the smooth surface can increase the contact area, thereby improving the conductivity.

Copper nanowires refer to nano-copper materials with an aspect ratio greater than 1000. The copper nanowires have a large aspect ratio and high catalytic activity. They have broad application prospects in petrochemical, fuel cell and other fields. For example, making copper nanowires into thin films as touch screens can reduce the cost of smart products.

In the application process, copper powders of different forms, such as spherical, branched, and flake, are usually mixed and matched to give play to their respective advantages and achieve better performance effects.

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