Copper powder is one of the Extension Cord important raw materials of metallurgy industry, its consumption
is in second place after the iron powder. Except used as raw materials for the
powder metallurgy materials, the directly application of copper powder is very
extensive, its consumption is only second to aluminum powder. Industry produce
copper powder methods are mainly have three kinds: (1) electrolytic method, the
powder with high purity, large range of applications, is the main production
method that most countries still used today, but there is large power
consumption, environmental pollution and other shortcomings; (2) oxide
reduction method, the United States atomization granulationoxidizedreduction
process as representation, the powder properties, varieties can be replaced by
copper powder, meet the application requirements, and overcomes the
disadvantages of electrolysis; (3) Water metallurgy method, have leaching-high
pressure hydrogen reduction, leaching-replacement or electrolysis process. Often
used for low-grade copper material utilization. The consumption of copper
powder accounts for most in industrial applications, because most powder
metallurgy copper parts are still suitable for used cold process-sintering pre-mixed
powder (copper powder adding elements powder such as tin, lead, zinc powder and
mechanical mixing), or part of the pre-alloyed powder (the mixed powder through
heat-treated to make diffusion alloying) to produce, such as used for
oil-bearing tin bronze powder.
Tin
powder, lead powder and zinc powder is mainly used atomization method to produce.
Tin, lead, zinc and copper-based alloys is the main alloying elements, so that
in the extensive use of copper powder to produce copper-based powder metallurgy
materials and products should also add tin powder, lead powder and zinc powder
as a raw material component. In addition, it also directly applied in preparing
solder flux, rubber and plastic additives, fireworks, metallic pigments and so
on.
Tungsten,
molybdenum rods, plates, wire is used tungsten, molybdenum powder as raw
material to further purify, process to form, also can be through tungsten,
molybdenum powder metallurgy process directly produce tungsten and molybdenum
shaped products. Tungsten powder also the important raw materials of cemented
carbide industry prepare tungsten carbide powder. Tantalum powder is mainly
used in manufacturing capacitor, is prepared by potassium tantalum fluoride by
thermal reduction of sodium metal. After tantalum powder made of bars though electron beam melting purified
and then by hydrogenation, crushing, dehydrogenation process can be prepared
high purity tantalum powder and tantalum alloy powder. Niobium powder is made
from aluminum thermal reduce niobium oxide and then hydride, crushing,
dehydrogenation process the resulting niobium metal. Titanium powder is
generally produced by sodium or magnesium thermal reduction method, obtained
spongy titanium (titanium sponge) can be further purified, processing titanium
and titanium alloy materials, can also be hydrogenated, crushing, dehydrogenation
to make of titanium powder. Manganese powder generally produced by mechanical crushing method and used materials
are electrolytic manganese metal, industrial application methods include
milling method, ultrafine grinding method, vertical mill grinding method and so
on.
Noble metal powders are mainly the silver powder applications. Silver powder used for
manufacturing battery electrodes and silver-based electrical contact materials,
used for the electronics industry conductive inks, ointments and adhesives,
etc., also used in dental amalgams, water purification and catalyst. The
electricity, electronics industrial silver powder is produced by chemical
precipitation method, with high purity, fine grain size and other characteristics,
a small amount is also produced by atomization. The production method of gold,
platinum and palladium powder are similar to silver powder, mainly used as conductive
material in the electronics industry.
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