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Preparation Method of Superfine Silver Powder and Nano Silver Powder

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Property of ultrafine and nano-silver powder:
Ultrafine particle morphology Silver powder Includes spherical (dendritic), flake, cube, and microcrystalline. Once the silver nitrate has been combined with ammonia water it can be obtained by adding dispersant and adding hydrazine. Average particle size is about 0.5mm. Specific surface area is 0.015m2/g. The silver oxide reduction process with formaldehyde is another option. Convert silver nitrate in silver carbonate and add triethanolamine for molecular reduction.

Ultrafine Silver Powder is an indispensable material for the electronic and electrical industries. It is also a popular type of precious metal dust widely used by the electronics industry. Nanosilver particles Due to their unique structure they exhibit small sizes, quantum-size effects, surface effects, macro-quantum Tunnelling effects and other effects. These nanosilver particle are essential for fundamental theoretical research and play a prominent role in fields such as surface enhancement of Raman spectroscopy or surface-enhanced reflection scattering.

High surface activity, high catalytic and wide use of nanosilver in catalysts is a common reason for using it. Because of its unique physical-chemical properties, nanosilver powder has been widely used in immunoassays as well as sensor development and molecular electronic research. Addition of nanosilver to chemical fiber can enhance the properties and sterilize products. The ultrafine-silver powder can be classified into a variety of shapes, including spherical or flake-like, as well as flocculent, dendritic, and dendritic.
How to prepare superfine silver powder or nano silver powder

Methods of preparation Ultrafine silver Powder These include the gas phase method (liquid phase), reliable phase method, and the gas phase method. Low yield, large investments and high energy consumption are the main disadvantages of the gas-phase method. However, the reliable phase method produces ultrafine powder with a very large particle size. Liquid phase chemical reduction is a popular method that allows for small batch production at a low cost.

To prepare ultrafine silver powder, you will need a liquid phase chemical reduce method. This involves using a reducing agents to remove silver from salt or complex organic solutions or systems. The most common reducing agents are formaldehyde (or ascorbic acid), glycerin or organic amines, unsaturated alks, sodium citrate and hydrazine. Hydrazine is generally used. An additive nitrate (or silver ammonia aqueous) is also added. To obtain silver powders with various particle sizes, an additive nitrate is added to the solution. You can use one or more nitrate additions. It is up to you how much. This process produces silver powder that is small in size with good reproducibility and wide distribution.

(aka. Technology Co. Ltd. (aka. We produce superfine silver dust with high purity, appropriate particle sizes and low impurities. You can get lower purity by contacting us. Get in touch if necessary.

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