Tantalum

What do we know about tantalum suppliers and its product? Tantalum is steel-grey color metal with a bit of a bluish shade. Tantalum is stable in air at normal temperatures. Oxidation begins at a temperature of approximately 200 to 300 degrees. After 500 degrees tantalum quickly begins to oxidize, and formed oxide.

Characteristic property of tantalum (tube) is the ability to absorb gases: nitrogen, hydrogen and oxygen. Minor impurities data elements influence on the electrical and mechanical characteristics of metal.

Hydrogen is absorbed very slowly at low temperatures, with a maximum speed of it is absorbed at a temperature of almost 500 degrees, it is not only adsorption, but are formed by the chemical hydrides. Absorbed hydrogen informs metal fragile properties, but in the process of heating of more than 600 degrees in a vacuum is allocated almost all the hydrogen, and restored the old mechanical characteristics.

The absorption of nitrogen tantalum is observed at 600 degrees, at higher temperatures is formed nitrite, melting at a temperature of 3087 degrees.

Tantalum tube and tantalum pipe is less stable in alkalis. Hot solutions of caustic alkalis eaten away by the metal, in soda and molten alkali he rapidly oxidized with formation of the sodium salts of tantalum acid.

For the first time tantalum applied in 1900-1903, (tantalum suppliers began to wide their dealing) the production of thread filaments for light bulbs, later it was replaced by wolfram.

Extensive use of tantalum tube and tantalum pipe is associated with the promotion of electric vacuum equipment, including production of radar, radio and x-ray instruments.

Tantalum is a combination of the important characteristics (high emission ability, high melting point and ability to absorb gases), which helps to use it for the production of parts electrovacuum devices. Ability to absorb gases is used to support deep vacuum in radio valves and other electric vacuum technologies.

Tantalum suppliers notice that coverage of tantalum is the same attractive, as of chromium and nickel. And not only outwardly. Developed methods to help cover layer of tantalum of different thickness great product (pipes, crucibles, sheets, rocket nozzle), the coating can be applied on different materials - steel, copper, graphite, etc. It is interesting, that the strength of the coating, Brinell, is equal to 180-200 kg/mm2, whiles the strength of the technical tantalum in the form of sheets and annealed bars - 50-80 kg/mm2.