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Nano copper

Edit: Ccdanni 2020-02-10 Mobile

  Copper metal has a wide range of applications, so its consumption and production capacity in non-ferrous metallurgy rank second in the world, behind aluminum. Nano copper powder has good thermal conductivity, self-lubricity and high activity, making it play an important role in many fields, such as electricity, mechanics, chemistry and other fields. This all stems from the unique basic characteristics of nano copper powders: surface interface effects, quantum size effects and quantum tunneling effects. Macroscopically, the nano-copper powder is reddish-brown and has high activity, so it is susceptible to oxidation in the air and can be dissolved in hot sulfuric acid and nitric acid. At present, nano-copper powders are often used as catalysts, lubricants, and conductive coatings in the industry. At the same time, they are widely used in engineering structural materials, aerospace and biological engineering.

  2. Research Status

  Nano copper powder has a large specific surface area and a large number of surface active centers, and is an excellent catalyst in metallurgy and petrochemicals. In the hydrogenation and dehydrogenation reactions of high molecular polymers, nanometer copper powder catalysts have extremely high activity and selectivity. Nano-copper powder is an effective catalyst in the process of acetylene polymerization used to make conductive fibers. The use of nano-copper powder as a solid lubricant is one example of nano-material applications. Ultrafine copper powder is properly dispersed in various lubricants to form a stable suspension. This oil contains millions of ultrafine metal powder particles per liter, which are combined with the solid surface to form a smooth At the same time, the micro scratches are filled, which greatly reduces friction and wear, especially under the conditions of heavy load, low speed and high temperature vibration. Because of this, nano-copper powder lubricants have been sold abroad.

  Nano-copper powder can be used as a catalyst to partially replace the precious metals platinum and ruthenium in the process of automobile exhaust treatment, so that carbon monoxide can be converted into carbon dioxide. Adding nano-copper powder to non-conductive grease, the original non-conductive grease becomes conductive grease. This conductive grease will be used on high-current electrical contacts and high-current knife-gate switches.

  3. Application fields of nano copper

  Conductive paste

  100 nanometer copper powder is mixed with copper electronic paste, which can sinter only 0.6 micron-thick electrode for MLCC, miniaturize MLCC device, optimize microelectronic process, replace precious metal electronic paste such as silver and electricity, and greatly reduce the price. cost.

  Efficient catalyst

  Copper and its alloy nano-powders are used as catalysts with high efficiency and selectivity, and can be used as catalysts in the reaction process of carbon dioxide and hydrogen to methanol.

  Drug Additives

  Nano-copper powder is used as a raw material to make a drug (0.2-0.4% by weight), which has a significant reduction in MDA content, improves lipid peroxidation damage caused by oxygen free radicals, significantly increases sod content, enhances the body's sod level, and regulates it The characteristics of functional activity expression can delay the aging process of the human body, interfere with and delay the transformation of its body tissue structure into aging, and open up a new way of anti-aging in the field of life sciences. Some researchers have prepared anti-aging and cerebral ischemia, cerebral thrombosis sequelae and other therapeutic drugs, which have exact curative effects and are convenient and safe to take. More experts and professors are used to treat cancer, and after they have achieved amazing results, they turn around and explore the mechanism. Nano-copper powder can also be used as an additive for new specific drugs such as osteoporosis and bone hyperplasia.

  Nano copper powder dispersion strengthened copper alloy

  It can greatly increase the strength and hardness of copper alloys, greatly increase the softening temperature of copper alloys, and greatly improve the electrical and thermal conductivity of copper alloys.

  Ink conductive filler

  100nm copper powder has the unique field emission effect and quantum tunneling effect of nanomaterials. It can replace silver powder as a highly conductive filler in highly conductive ink, which can greatly reduce costs.

  Metal and non-metallic surface conductive coatings

  Nano-aluminum, copper and nickel powders have highly activated surfaces. Under oxygen-free conditions, coatings can be applied at temperatures below the melting point of the powders, which can be applied to the production of microelectronic devices.

  Metal Nano Lubricant Additive

  Adding 0.1-0.6% to lubricating oil and grease, during the process of friction, the surface of the friction pair will form a self-lubricating and self-repairing film, which significantly improves the anti-friction performance of the friction pair.

  With the rapid development of industry and economy, environmental issues related to human sustainable development have become major issues for human society. The quantum size effect and high value performance of nano metal particles have caused more and more attention to its theoretical research and application in catalytic technology. Because the resistance of metal is extremely low, only higher than silver, and the price is far lower than silver, so nano copper particles have excellent development prospects. At present, the preparation technology of nano copper particles is becoming more and more perfect, but the practical application research is not mature. With the comprehensive development of nanotechnology, nano copper particles will gradually enter people's lives.

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