Usually the electrical enclosure are made of resin plus carbon black paint spraying to form a smooth surface, due to the carbon black have conductive effect, so the surface of the coating have an electrostatic shielding effect.
Nano-electrostatic shielding materials used in household appliances and other electrical equipments have a good static shielding role.If it can not be static shielding, the electrical signal will suffer serious interference from external static. For example, the body close to the TV which have bad shielding effect, static electricity from the human body will produce serious interference to television images. In order to improve the performance of electrostatic shielding paint, Japan has successfully manufactured nano-coatings with good electrostatic shielding, the applied nanoparticles have Fe2O3, TiO2, Cr2O3, ZnO. Those having semiconductor characteristics nano-oxide particles at room temperature with higher conductivity characteristics than the conventional oxide, so that can play the role of electrostatic shielding, while the color of the oxide nanoparticles is different, TiO2, SiO2 nanoparticles are white, Cr2O3 is green, Fe2O3 is brown, so that it can by the composite to control electrostatic shielding paint colors. This nano electrostatic shielding paint not only has a good electrostatic shielding characteristics, but also overcome the carbon black electrostatic shielding paint only a single color monotonous synthetic clothes and chemical fibre carpet because of the friction generated by the electrostatic effect in the dark is likely to be observed, also easy to absorb dust, bring a lot of inconvenience to the user. From a security point of view to improve the quality of chemical fiber products to solve static problems is the most important, metal nanoparticles in order to solve this problem provides a new way, adding a small amount of metal nanoparticles in the chemical fiber products will greatly reduce the electrostatic effect. Germany and Japan are prepared the responding products. Add nanoparticles in chemical fiber products and textiles also have the role of removing the taste and sterilizing. Added Ag nanoparticles to the socks can remove foot odor, medical gauze put into the nano Ag particles have the disinfection and sterilization effect.
Conductive paste is an important raw material in the electronics industry, conductive coatings and conductive adhesive applications is very broad. Germany has already applied a patent, i.e. use nano Ag instead micron Ag to made conductive plastic can save 50% of Ag powder, use this conductive adhesive weld metal and ceramic, the coating does not need too thick, and the coating surface is smooth, much welcomed by users. In recent years, people have begun to try to use nanoparticles to make conductive paste, insulation paste and dielectric paste, are playing a role in the microelectronics industry. The melting point of the ultra fine particles is usually less than the coarse grain objects. For example, according to metal powder supplier, the melting point of silver is about 9000, and ultrafine silver powder’s melting point can reduce to 1000. Therefore use silver powder made of conductive paste can be sintered at a low temperature, the substrate is not necessarily to use high temperature resistant ceramic material, and even can be used plastics and other low temperature materials.
Nanoparticles are also the effective accelerant. For example, add about 1wt% superfine aluminum or sickle particles in solid fuel propellant rocket launchers, every per gram of the fuel’s combustion heat is increased by 1 times; ultrafine boron powder, high chromate plating powder can use as explosives’ accelerant; the nanoscale iron powder can also be used as solid fuel accelerant. Some nanomaterials have the function to stop burning, can be used as flame retardants added into flammable building materials to improve the fire resistance of construction materials.
The initial application of nanoparticles in industry shows its superiority. Researchers added nano- A12 to the rubber to improve the abrasion resistance and dielectric properties of the rubber. Japan was added A12O3 nanoparticles to the ordinary glass, and significantly improves the brittleness of the glass. Chinese researchers added the A12O3 nanoparticles while preparing Al alloy, results in the crystalline grain significantly refine, strength and toughness are improved. Inorganic nanoparticles have good fluidity, utilizing this characteristic can be prepared a solid lubricant.
Source:http://www.mhcmp.com
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