1. Application of ultrafine copper powder on MLCC internal electrodes
Copper has the advantages of small resistivity, small electromigration speed, and low price. It is an ideal substitute for silver-palladium internal electrodes, but its chemical properties are more active. In air, powdered copper with large specific surface area is easily Oxidation, the surface will form a film of Cu2O and CuO, causing its conductivity to drop rapidly and even become non-conductive. The inner electrode of the chip type multilayer ceramic capacitor prepared by the ultra-fine copper powder prepared by the phase reduction method overcomes the above disadvantages, and has the advantages of good dispersibility, high sphericity, uniform particle size, etc., and is sure to become an excellent choice for the MLCC.
2. Application of ultrafine copper powder in conductive coatings
Conductive coatings are a kind of functional coatings that have been rapidly developed along with advances in science and technology. At present, the main fillers are carbon, silver, copper, nickel and composite. As a conductive filler in electromagnetic wave shielding coatings, copper powder has high electrical conductivity, relatively low price, easy availability of materials, and there is no advantage that silver powder may cause “silver migration” in the coating to affect coating performance. However, copper is easily oxidized, and its oxide conductivity is low, resulting in a decrease in the electrical conductivity of the coating. Therefore, research and development of low-price, metal-resistant copper powder composite conductive coatings have received increasing attention.
3. Application of ultrafine copper powder on lubricant
Ultrafine copper powder is dispersed in various lubricating oils in a suitable manner to form a stable suspension, which can be an excellent lubricant, which greatly reduces the wear and friction of materials and equipment, especially at heavy loads and low speeds. It plays a more significant role in high-temperature vibration and plays an extremely important role in protecting materials and equipment. For example, copper sulphate pentahydrate is used as the main raw material to prepare nano-copper powder. Its anti-wear and anti-friction performance is stronger than traditional lubricating oil, and it has become an anti-wear and anti-friction additive for a new generation of lubricating oil.
4. Application of ultrafine copper powder on catalyst
Ultrafine copper powder is fine and uniform in particle size and has a high surface activity. One of its characteristics is used to manufacture high-efficiency catalysts. For example, in the process of automobile exhaust gas purification, ultrafine copper powder partially replaces precious metals such as platinum and rhodium as a catalyst, converting toxic carbon monoxide into carbon dioxide and converting nitrogen monoxide into nitrogen dioxide. Ultrafine copper powder has high catalytic activity and is also used as a catalyst in the reaction process of carbon dioxide and hydrogen synthesis of methanol. The nano copper particles catalyzed the polymerization of acetylene and achieved satisfactory results.
5. Application of ultrafine copper powder in other aspects
Ultrafine copper powder is used to prepare nano-copper material, which can obtain copper material with good ductility, good strength and plasticity, which is very beneficial to the processing of materials and the manufacture of micro-machines.
In addition, due to the low melting point of copper, ultrafine copper powder is often used in the aerospace field to make rocket nozzles. In terms of medical treatment, ultrafine copper powder also plays an important role in the treatment of diseases such as osteoporosis and fracture.
It can be said that ultrafine copper powder has many excellent properties different from conventional materials of the same composition due to its small size effect, surface interface effect, quantum scale effect and quantum tunneling effect, and is widely used in mechanics. In the fields of electricity, chemistry, etc., with the further development of science and technology, it will surely show more potential application prices and play a greater role in a broader field.