Tantalum is also a kind of rare metal is steel gray luster, melting point 2980 ℃, the density of 16.6 g/cm 3.Tantalum is similar to niobium and is a very stable chemical element. Only fluorine, hydrofluoric acid, acidic solution containing fluoride and sulfur trioxide can react with tantalum. It reacts with a concentrated solution at room temperature and is dissolved in a molten base. The density of tantalum in mild oxidation to the start of the 200 ℃.Tantalum has good low temperature plasticity, tantalum alloy even in - 196 ℃ can keep the ductility. Tantalum also has the ability to absorb hydrogen, nitrogen, etc, and it is in 200-300 ℃ under the suction, high temperature 800-1200 ℃ under the condition of vacuum and precipitation. Under natural conditions, tantalum and niobium are symbiotic, and the minerals containing tantalum and niobium are: tantalum niobium and tantalum niobate. Smelting furnace slag is also an important resource for the extraction of tantalum. The classification of tantalum or niobium mainly depends on the amount of tantalum or niobium in the mineral. Tantalum can be used as a solid electrolytic capacitor with large capacity, small volume and stable performance. It is used in radar, missile, supersonic aircraft and electronic computer. But it can also produce oil and chemical heat exchangers, heaters, concentrators and reactor slots, towers, pipes and valves. But it is also used for electronic transmitting tube and high power tube parts. Tantalum alloy can be used for supersonic aircraft combustion chamber and high temperature resistant material. Tantalum tungsten alloy nozzle of missile under 1650 ℃ still has the strength of the 8 kg/was. Tantalum carbide can be used alone or in conjunction with other carbides for forging, cutting tools, jet engine turbine blades, valves and rocket nozzles. The hardness of tantalum carbide is similar to that of diamond and is widely used in the manufacture of cemented carbide. Tantalum can also be used as a surgical prosthesis and artificial bone, which can be used as bone plate, screw, magnesium rod and suture needle etc.
Tag:Tantalum , Niobium
