Preparation method of nano silver powder in the manufacturing of nano conductive silver paste

Nano conductive silver paste, as a material with high conductivity and excellent conductivity, is widely used in electronic components, conductive tapes, conductive films and other fields. One of the key steps in its manufacturing process is the preparation of nano silver powder. This article will provide a detailed introduction to the preparation method of nano silver powder and combine it with the research of Advanced Institute (Shenzhen) Technology Co., LtdResearch Platinum Brand YB8602 Nano Conductive Silver PasteProvide an explanation.

Preparation method of nano silver powder

1. Physical methods

Physical method preparationnano-silverIt has the advantages of high purity and excellent performance, but it requires high equipment and relatively high cost. Common physical methods include gas-phase method, sputtering method, mechanical ball milling method, laser burning method, ultrasonic method, and irradiation method.

• Gas phase method: by evaporating silver raw materials into hot steam under high temperature conditions, and then depositing nano-sized silver powder in an inert atmosphere.
• Sputtering method: using high-energy particles to bombard silver target material, causing it to sputter and deposit on the substrate to formnano-silver.
• Mechanical ball milling method: Place multiple grinding balls of different sizes in a sealed container isolated from air, vibrate and rotate the container, and obtain nano-sized silver powder through the stirring and grinding action of the grinding balls.
• Laser burning method: Using a high-energy laser beam to irradiate the metal surface to prepare pure nanoscale metal sol.
• Ultrasonic method: using high-frequency oscillation of ultrasonic waves to cause bubbles in water or other liquids to explode in microseconds, producing a high temperature and high pressure state, and reducing to prepare nano silver powder.
• Radiation method: By ionizing radiation, such as high-energy gamma rays, water is ionized and excited, generating reducing particles H free radicals to reduce Ag to nano silver powder.

2. Chemical methods

The preparation of nano silver powder by chemical methods has the advantages of simple operation and low cost, but may involve the treatment of toxic and harmful substances. Common chemical methods include reduction method and sol gel method.

• Reduction method: Silver salt (such as silver nitrate) is added to a solvent, and then a reducing agent (such as glucose, sodium borohydride, etc.) is added to reduce the silver salt to nanoscale silver particles. By controlling the reaction conditions and concentration of the reducing agent, the particle size and morphology of silver nanoparticles can be regulated.
• Sol gel method: dissolve silver salt in solvent, then add appropriate complexing agent and gel agent to form sol, and then obtain nano silver powder through drying and heat treatment.

Research Platinum Brand YB8602 Nano Conductive Silver Paste

Advanced Institute (Shenzhen) Technology Co., LtdResearch Platinum Brand YB8602 Nano Conductive Silver PasteIt has won widespread recognition in the market for its outstanding performance. This product has excellent conductivity and low resistivity, which can meet the needs of high-precision electronic applications.

• Particle size control: The nano silver powder particles in the YB8602 nano conductive silver paste of Yanbo brand are controlled at the nanometer level to achieve better conductivity and dispersibility. The smaller the particle size, the larger the surface area and the better the conductivity.
• Selection of dispersant: Add an appropriate amount of dispersant to improve the dispersibility and stability of nano silver powder, and prevent its aggregation and precipitation.
• The use of other additives: According to actual needs, viscosity enhancers, antioxidants, etc. are added to further improve the viscosity and prevent oxidation of conductive silver paste.

The solid content of YB8602 nano conductive silver paste from Yanbo brand is as high as 85 ± 1%, ensuring the compactness and durability of the conductive material. The viscosity is set to 100 Pa · s, which ensures the fluidity of the conductive adhesive during the coating process and avoids uneven distribution caused by excessive flow. Its curing temperature range is between 130-150 ℃, and the curing time only takes 30-60 minutes, greatly improving production efficiency. In addition, the electrical resistivity of the product is less than 2 × 10 ^ -4 Ω· cm, the electrode thickness is controlled at 8-10 µ m, and the shear strength reaches 120N/cm ². These indicators indicate that the conductive silver paste has extremely high application value in high-precision electronic applications.

conclusion

The preparation of nano silver powder is one of the key steps in the manufacturing process of nano conductive silver paste. Nano silver powder with high conductivity and excellent properties can be prepared through physical and chemical methods.Advanced Institute (Shenzhen) Technology Co., LtdYB8602 nano conductive silver paste from the research platinum brand has become an indispensable material in high-precision electronic applications due to its excellent performance and wide application prospects. In the future, with the continuous advancement of electronic technology, the market prospects of nano conductive silver paste will be even broader, injecting new vitality into the development of the electronics industry.

The above data is for reference only, and specific performance may vary due to production processes and product specifications.