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Tantalum powder. Brand chemical composition.

Tantalum powder. Brand chemical composition.

General characteristics

Tantalum powder is a finely divided mass is obtained by mechanical or chemical means. Used for the production of jewelry, heat-resistant alloys and capacitors, as an alloying component material for nuclear boilers.

The physical qualities That
Atomic (molar) mass, g/mol 180,948
Atomic number 73
The density of The metal [g/cm3] 16,65
The melting temperature t°C 3020°C
The degree of oxidation 5
The thermal conductivity K [W/(m·K)] 10,9
Molar volume cm3/mol 57,5

Production

The powder That is produced from waste tantalum sheet brand TN-3 method of processing in a sealed furnace in an atmosphere of purified hydrogen. In addition to the required looseness technology provides on the metal surface no traces of oxides. Then the powder is sent to a concentration table for blasting, where a mixture of hydrochloric and nitric acid in a porcelain tank, remnants of an electrolyte when heated are separated together with the impurities. The powder is then washed with water and thoroughly dried. The powder That produces the electrolysis of salt melt composed of potassium fortuntate — K2 TaF7, pentoxide TA2 O5, chloride and potassium fluoride.

Properties

Powder That is black in color, depending on the dispersion, but most of the factions — the bright and bluish-steel color. The powder in pure form is very malleable and ductile, possesses extraordinary resistance to corrosion, even under the action of concentrated acid. In the process of heating the hydrogen absorbed by the hydrogen, and the tantalum is converted into a black powder of the hydride. First pressing, it is administered in alcohol or glycerin solution, which in the sintering process is completely removed.

Tantalum powder. Percentage composition.

Class N Mo Ti Al O W Co Na Cu Cr Ta
1, 2A, 2B, 3, 4A, 4B 0.012 0.01 0.0008 0.0008 0.15 0.01 0.0001 0.0003 0.002 0.0008  
5A 0.012 0.001 0.0008 0.0003 0.25 0.003 0.0001 0.0003 0.001 0.0005  
5B 0.012 0.001 0.0008 0.0003 0.3 0.003 0.0001 0.0003 0.001 0.0005  
VV-1, VV-2, VV-3 0.012 0.001 0.0008 0.0005 0.15 0.003 0.0001 0.0003 0.001 0.0005  
Tapa, TAPB 0.012 0.001 0.0008 0.0003 0.35 0.003 0.0001 0.0003 0.001 0.0005  
Tapm 0.01 0.01 0.01 0.01 0.9 0.02 0.0005 0.0005 0.01 0.008  

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