Nano metal powders have broad application prospects in fields such as electronics, magnetic materials, automotive industry, military industry, and powder metallurgy. For example, nano materials such as iron, aluminum, zinc, titanium, nickel, chromium, tantalum, cobalt, and so on have been produced. The most important factor in achieving optimal performance of nanometallic powders is the uniform dispersion of nanometallic powders. Due to the small particle size and high surface energy of nano metal powders, there is a tendency for spontaneous aggregation. Therefore, how to improve the dispersion of nano metal powder in the medium is the key technology in the application of nano powder materials.

One method is mechanical dispersion, which involves breaking the aggregation between metal powders and dispersing them into solvents through high-speed shear, pressure, magnetic force, and other methods. This method is suitable for metals with larger powder particles and higher hardness, such as iron, copper, aluminum, etc.

Another method is chemical dispersion, which uses chemical substances such as surfactants and dispersants to change the surface properties of the powder, reduce the attraction between particles, and disperse it into the solvent. This method is suitable for metals with small powder particles and easy oxidation, such as silver, gold, platinum, etc.

Another method is ultrasonic dispersion, which uses the mechanical action of ultrasound to break down powder aggregation and disperse it into solvents, and can complete the dispersion process in a short time, suitable for various metal powders.

Regardless of the method used, the preparation of dispersion requires mastering key factors such as the type, concentration, and dispersion time of the dispersant to ensure dispersion effect and stability