Tantalum is a rare element in the earth’s crust. It is a heavy refractory metal similar to rhenium. The temperature of The melting point 2996 °C, t° boiling point of 5300 °C, the metal Is steel-gray hue, almost as heavy as gold has a density of 16.6 g/cm3. Pure tantalum is very ductile despite the hardness Under normal conditions, it is possible to roll to thin thread. The metal at the same time increases the ductility and toughness of the alloys. Up to 1000 °C, its specific strength is higher than heavy tungsten. Tantalum is resistant to oxidation in air at ordinary temperatures. Oxidation starts at 200−300°C. the Peculiarity of this metal is its ability to absorb gases when heated: nitrogen, hydrogen, and oxygen, impurities which affect its performance. The so absorbed hydrogen informs metal fragility, Tantalum absorbs nitrogen at 600 °C. the tantalum Nitrite has t° melting 3087 °C. the Tantalum little resistant to alkalis. With hot alkaline solutions, it forms a salt. f
Tantalum is the basis of high-temperature and corrosion-resistant alloys, which are used for the manufacture of chemical laboratory glassware, filerow, crucible for melting rare earth elements; heat exchangers in nuclear power. Tantalum of all known materials is the most stable in pairs, molten 133-cesium. This metal is biologically inert Tantalum wire and ribbon fasten surgeons ligaments, nervous tissue, from a sheet made of bone prostheses. Alloys of tantalum indispensable tool for Metalworking. Carbide of tantalum and tungsten (t° melting almost 3900 °C) to produce super-hard alloys «TT», for percussion rotary drilling. Tantalum shirt heat shells improves armor penetration. Of tantalum and niobium to produce energy-intensive electrolytic capacitors. Tantalum wire serves as the basis of the filaments, meshes, cathode ray tubes, mass spectrometers, etc. similar devices. Oxides of tantalum to form on the surface of the jewelry durable film of pure spectral colors. Beryllide tantalum, superhard material, are used in the exploration and the military-industrial complex. Tantalum pentoxide absorbs ionizing radiation, it is added to the special glass used in radiology and nuclear energy.
Circle section 5 — 50 mm, wire cross section 0.5 — 5 mm. tape with thickness of 0.1 mm and a width up to 150 mm. sheet thickness up to 1 mm format mm. 650x1350 On the valid samples of insignificant defects, the risks, the traces of broach, shrinkage irregularities, which fall within the boundaries specified by the standard deviations. On the cut sheet and the ribbon must not contain foreign inclusions. The surface must be clean, free of cracks, burrs. Rolled in original packaging stored in closed warehouses. It can be transported by any transport. When transporting the semi-finished products must be protected from mechanical damage, moisture, dirt, corrosive substances.
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