Blog Arşivi Molchem Technologies

What is copper powder?

What is copper powder?

Characteristics: Distinctive reddish color; ductile; excellent conductor of electricity. Complexing agent, coordination numbers 2 and 4. Dissolves readily in nitric and hot concentrated H2SO4, in HCl and dilute H2SO4 slowly but only when exposed to the atmosphere. More resistant to atmospheric corrosion than iron, forming a green layer of hydrated basic carbonate. Readily attacked by alkalies. A necessary trace element in human diet; a factor in plant metabolism. Essentially nontoxic in elemental form. Powder is combustible.

Derivation: With sulfide ores the steps may be
(1) concentration (of low grade ores) by flotation and leaching
(2) roasting
(3) formation of copper “matte” (40-50% Cu)
(4) reduction of matte to “blister” copper (96-98%)
(5) electrolytic refining to 99.9+% copper

Hazard: Toxic and flammable in finely divided form.
Tolerance (fume) 0.2 mg/m3; (dusts and mists) 1 mg/m3.


Using Copper Powders

Copper and copper alloy powders have been used in industrial applications for many years. Probably the best known is the self-lubricating bearing which was the first major application and still accounts for about 70% of the granular copper powder used. This application takes advantage of the ability to produce a component with controlled interconnected and surface-connected porosity. The production of metallic filters also takes advantage of this ability.

Pure copper powder is used in the electrical and the electronics industries because of its excellent electrical and thermal conductivities. Alloyed with tin, zinc, nickel and other elements, copper in powder form is used in structural parts and friction materials. Brasses, bronzes and other copper alloys produced by powder metallurgy methods have the physical and mechanical properties of their cast or wrought counterparts. Copper is used also as an alloying element in iron powder components to enhance the mechanical properties and control dimensional changes during sintering, the addition being made either by mixing or by infiltration.

In addition to the above applications of granular copper powder, a large quantity of copper and copper alloy powder is used in flake form,i.e., as a powder whose thickness is small in relation to its other dimensions. Such powders are used, for example, in antifouling paints, decorative and protective coatings and printing inks.

Copper and copper alloy powders are also used in such nonstructural applications as brazing, cold soldering, and mechanical plating, as well as for medals and medallions, metal-plastic decorative products and a variety of chemical and medical purposes.

What is Iron Powder ?

Iron is a metallic chemical element with the symbol Fe (Latin: ferrum) and atomic number 26. Iron is a group 8 and period 4 element and is therefore classified as a transition metal. Iron and iron alloys (steels) are by far the most common metals and the most common ferromagnetic materials in everyday use. Fresh iron surfaces are lustrous and silvery-grey in color, but oxidize in air to form a red or brown coating of ferric oxide or rust. Pure single crystals of iron are soft (softer than aluminium), and the addition of minute amounts of impurities, such as carbon, significantly strengthens them. Alloying iron with appropriate small amounts (up to a few percent) of other metals and carbon produces steel, which can be 1,000 times harder than pure iron.

Iron-56 is the heaviest stable isotope produced by the alpha process instellar nucleosynthesis;heavier elements than iron and nickel require a supernova for their formation. Iron is the most abundant element in the core of red giants, and is the most abundantmetal in iron meteorites and in the dense metal cores of planets such as Earth.

Iron powder is produced in many different grades for varieties of applications. We can help you select the best iron powder for your specific application. In case the iron powder you need is not a stock item, we will be glad to supply it based on the specifications you require.

High purity fine iron powders are used to manufacture sintered components, soft magnetic components, brazing, iron fortification, friction products, printing, surface coating, welding, chemistry and polymer filtrations.

The most common iron powders for msny of the above applications are high purity 100 mesh iron powders.

This is a very fine iron powder containing particles as small as 325 mesh. This is also the most cost effective product for many applications.

For very special applications we can supply other mesh sizes as required.We also offer cast iron powder with 90% metallic iron and small amounts of iron oxide, carbon, silicon, chromium and manganese. Cast iron powder is used in the manufacturing of specialty alloys and as an ingredient in pyrotechnic mixtures.

Other applications of the cast iron powder include production of iron chemical compounds such as Iron Sulfate, additive for animal food.

Cast iron powder has a brownish color due to the presence of iron oxides.