subject: The Application Of Nano Metal Powder In The Lubricant [print this page] The ultra-fine metal powder (such as nano copper, nano nickel and their alloys, etc.) in an appropriate manner, adding oil, obtained a high performance of the new lubricant. Tribological experiments showed that when copper powder particle size greater than 100nm, it is an abrasive, but its size is less than 50nm, can be more substantial increase in oil-free card bite the maximum load. This performance of nano-copper powder so that the lubricating oil has an important purpose, national research institutions through the surface modification of nano-copper powder, copper powder in nano-lubricants to overcome the phenomenon of self-hatred, to uniform, stable dispersed in nanometer copper lubricant and prevent the accumulation and precipitation of the second, successful development of nano-copper lubricating oil additives. This additive will be added to the car engine oil in the engine can be significantly reduced starting current and significantly increased cylinder pressure. Using this engine additive for some time, boron powder on the cylinder liner and piston rings will form a protective film, once the lubricating oil system failure, the car still safe to exercise for some time.
Nano metal powder in the electronic field of application
With the sharp metal powder particle size decreases, its physical properties will change a lot of Articles. Such as gold melting point of 1064 degrees of conventional, when the particle is reduced to 10nm, then the lower 27 degrees, 2nm size of the melting point of gold is only about 327 degrees; silver melting point of 670 degrees conventional, and AMD may be lower than the melting point of silver particles 100 degrees. Therefore, nano-powders made of conductive paste, can significantly reduce the sintering temperature, can greatly improve chip reliability and yield, reduce production costs. Such as ultra-fine silver conductive paste can be made of low-temperature sintering, manganese powder in which case the component substrate may not have to use high-temperature ceramic materials, and even used plastic. Nano-conductive paste can be widely used in microelectronics industry in the wiring, packaging, connectivity, miniaturization of microelectronic devices play an important role.
Nano metal powder in the magnetic field of application
Nano metal powders used in manufacture of nano-magnetic recording materials, magnetic fluids, magnetic nano-particles film materials, such as nano-cobalt, nano-iron, nickel and other magnetic metal powder, nano-magnetic fluid preparation can be applied to rotary seals, silicon powder damping devices, magnetic liquid printing, mineral separation, precision grinding and polishing, magnetic substances, magnetic brake fluid, etc.
Nano metal powder materials in the application of antimicrobial
In recent years, research and development shows that nano-silver particles have excellent antibacterial activity. According to reports, the U.S. produced a nano-silver
Fabric, its antibacterial properties than the soluble silver ions (such as silver nitrate aqueous solution), nickel powder better than has been available for more than 60 years, good results in clinical use, no resistant silver sulfadiazine. With its production of controlled burns, burn infection drug effects is very good, the product sales in 2001 over $ 30 million, expected sales in the next few years will greatly increase.
Nano metal powder in the powder metallurgy field of application
As the nano-metal powders with high specific surface area, the chemical activity of a large, making the powder sintering temperature is low, so the powder metallurgy process can be used as sintering additives, the sintering process to shorten the heating cycle, and even reduce the sintering temperature. In addition, nano-metal powders can be prepared by powder coating, such as the use of laser connected to the glass powder, gel or powder melted into the upper substrate.
