The,application,analysis,metal business, insurance The application analysis of metallic nickel and their oxides
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Nickel is closed to silvercolor, element symbol is Ni, is a hard and malleable and has ferromagnetic propertymetal element. It can be highly polished and resist corrosion, and has good mechanicalstrength and ductility, refractory, thermostability, and have high chemicalstability, can not be oxidized in the air and other features, it is a veryimportant rare metal materials used to manufacture steel.Accordingto metal powdersupplier, nickel deposits can bedivided into sulphide deposits and laterite deposits, mining sulphide deposits costlow and have many by-products, by-products including copper, iron, chromium,cobalt, manganese, gold, silver, etc., so in the past 50 years, global nickelproduction have a large proportion is refining from the sulphide deposit. Thetop three global nickel ore reserves countries are Australia, Russia, NewCaledonia and other countries, the total output of these three countries was overhalf of global output. In the part of refining nickel, Japan is rather special,because Japan is not a nickel-mining country, but because of special steelproducts with high demand, so it imports a lot of nickel ore to refine, Japan'srefining production accounts for about 13%, only inferior to Russia.Theuse of nickel is in stainless steel, special steel, plate, magnetic materials,non-ferrous alloy, batteries, catalysts, etc., mainly used in petrochemicalplants, automotive, industrial equipment, household appliances, electronicequipment, communications equipment and petroleum refining. The nickel demanddivided into low-purity nickel, ferronickel, nickel oxide, nickel powder fields. Among them, the largest use of nickel is in makingstainless steel, accounting for about 65% of the total consumption.The applicationfield of nanometer NiO is broad, the following will mainly describe itsrelatively extensive applied research in several areas: due to the nano nickeloxide having a large specific surface area, in many transition metal oxide,nickel oxide catalyst has good catalytic properties, and when the nickel oxidenanoparticles combined with other materials, its catalytic role can be furtherstrengthened. It was used with a regular hollow silica skeleton wrapped NiO compositesresearch nickel oxide catalytic and oxidized organic amine obtain betterresults. Because of this nano-nickel oxide particles with the features of highspecific surface area and silica surface rich pores, so the contact area of the catalytic reaction and diffusionefficiency have been significantly strengthened.Inexpensivemetal oxides such as NiO, Co3O4 and MnO2 can replace other precious metaloxides such as RuO2 as electrode material supercapacitors, of which nickel oxidepreparation method is simple, inexpensive, so attach public attention. Preparationof Nano-nickel oxide electrode capacitance can often reach 300F/g or so, the number of cycles up to500 to 1000 times.Due toNiO in the optical absorption spectra showed selective light absorption, thismaterial in optical switches, optical computing, optical signal processing andother fields have their application value. Studies used porous anodic aluminumoxide as template prepared about length 60¼m, outer diameter about 200nm nickeloxide nanotubes, the light absorption bandwidth narrower than the pure largecrystals nickel oxide, thereby exhibiting a better selective light absorptioncharacteristic.SinceNiO is a semiconductor material, use gas adsorption make the conductivity vary canbe manufacturing gas resistance. It was developed to use nano-composite nickeloxide thin film making sensors, it can monitor the indoor toxic gases - formaldehyde.It was also have someone used nickel oxide thin films prepared gas sensor whichat room temperature can operate H2. NiO in the optical, electrical,magnetic, catalytic, biological and other fields will also be further developed.Source:http://www.mhcmp.com
The,application,analysis,metal