Silver powder plays a core role in the silver conductive paste. Its morphology, particle size and distribution characteristics, loose and tap density, specific surface area, sintering performance, and corrosion resistance will all affect the performance of the paste. Appearance structure characteristics and granularity characteristics are the most critical characteristics, which directly or indirectly determine other properties.
Generally speaking, there are two classification methods for silver powder. First, according to the particle size, it can be divided into four types: fine, ultrafine, ultrafine and nano silver powder.
The first type: fine silver powder, average particle size 10-40um
The second type: very fine silver powder, average particle size 0.5-10um
The third type: superfine silver powder, the average particle size is less than 0.5um
The fourth type: Nano silver powder, the average particle size is less than 0.1um
Secondly, according to the appearance, it can be divided into spherical, flake, dendritic and mixed silver powder.
What are the silver powder preparation processes?
There are many kinds of silver powder preparation methods, such as mechanical ball milling method, evaporation condensation method, spray thermal decomposition method, chemical reduction method, electrochemical deposition method, microemulsion method and so on. Among the many preparation processes, chemical reduction has become the most widely used production method in industry due to its easy availability of raw materials, simple process, simple equipment and easy operation.
For more information about the application of silver powder, nano silver powder and silver powder in conductive paste, please contact us. Our company has a team of doctoral and graduate students with cutting-edge scientific research achievements, which can help companies solve more practical problems in practical applications.