Silver powder dispersants in application of sliver powder
Silver powder dispersants play a crucial role in the preparation and application of silver powder. The following are the specific functions of silver powder dispersants:
Preventing silver powder agglomeration: Dispersants can coat the surface of silver crystals or silver powder particles to form a protective film, reducing the interfacial tension of silver powder and effectively preventing agglomeration between silver powder particles. This helps to obtain silver powder products with higher dispersion and more uniform particle size.
Influence on silver powder particle size: By adjusting the type and amount of dispersant, the particle size of silver powder can be affected. For example, certain dispersants can prevent further growth of silver crystals, thereby reducing the average particle size of silver powder. Meanwhile, dispersants can also affect the morphology of silver powder, making it more regular.
Improving the performance of silver powder: The use of dispersants can improve the wetting and affinity between silver powder and carrier, as well as the leveling and printing properties of the slurry. This is crucial for the preparation of high-performance conductive plastics, conductive coatings, and conductive adhesives.
Improving production efficiency: In the preparation process of silver powder, the use of dispersants can optimize reaction conditions and improve production efficiency. For example, by reducing the reaction temperature and time, production efficiency can be improved while ensuring product quality.
Common silver powder dispersants include polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), sodium dodecyl sulfate (DBS), gelatin, oleic acid, Arabic gum, etc. These dispersants have good solubility in water and can play a good dispersing role in the preparation process of silver powder.
In summary, silver powder dispersants play multiple important roles in the preparation and application of silver powder, and are of great significance for improving the quality and performance of silver powder products.