Uses Of Niobium

Niobium is used as an additive in iron-, nickel- and zirconium-based superalloys to improve their strength properties. Niobium is used in the atomic energy industry as a structural material for reactors and as a sheath material for nuclear fuel, as well as a thermal protection and structural material in the aviation and aerospace industries. Niobium capacitors are similar to tantalum capacitors, but due to the small density of niobium, the capacitance per unit volume is larger. Niobium-titanium, niobium-zirconium alloys and niobium-tin, niobium-aluminum-germanium and other compounds of superconducting materials, in addition to being used for power transmission, power generation, the manufacture of superconducting magnets, control of nuclear fusion, but also used in cosmic vehicles in the navigation device, high-speed diving vessels electromagnetic propulsion equipment and superconducting super-class high-speed trains. Niobium has better acid corrosion resistance than zirconium, but not as good as tantalum, and can be used as heat exchangers, condensers, filters, stirrers and so on. Niobium carbide can be used alone or with tungsten carbide, molybdenum carbide, for hot forging molds, cutting tools, jet engine turbine blades, valves, tail skirts and rocket nozzle coating. Alloy steel containing niobium has high strength, good toughness, resistance to cold quenching, and is widely used in oil pipelines. Lithium niobate single crystals are used in color televisions. The nature of niobium niobium is a kind of steel gray luster refractory rare metal, its melting point of 2467. C, density of 8.6 g / cm 3. Niobium has a good low-temperature plasticity, can be cold pressure processing into a variety of semi-finished products. It is high temperature resistant and strong, and still has sufficient strength, plasticity and thermal conductivity above 1000.C. It is superconductive at very low temperatures. Superconductivity at very low temperatures is the best, such as at minus 260.C or so its resistance is close to zero. Resistant to chemical corrosion and atmospheric corrosion below 150.C. At room temperature to many acids and salt solutions are stable, but soluble in hydrogen brittle. Generates a stable oxide film when anodized. Niobium in minerals in nature. Generates a stable oxide film when anodized. In nature minerals niobium, tantalum symbiosis, containing niobium and tantalum minerals are: burnt chlorite, niobium-tantalite, brown yttrium niobium ore, niobium-containing titanium-iron rutile, rhodochrosite, as well as niobium-tantalum salt-containing sand ore. Certain steelmaking slag and tin smelting slag are also important resources for the extraction of niobium. Classification of niobium ore or tantalum ore is mainly based on the amount of niobium or tantalum contained in the mineral. Niobium three tin superconducting magnetic properties to reach the international level Baoji Rare Nonferrous Metals Processing Research Institute with self-produced wire trial production success of the inner diameter of 23.5 mm inserted multi-core niobium three tin superconducting magnets. This magnet and conventional magnets than the small size, light weight, high magnetic field strength; if the power closure operation, the long-term operation does not require power supply. After the Chinese and French scientific and technological personnel in the French National Center for Scientific Research high-field laboratory together with the test, in -286.96 ℃, the magnet center field strength of 154,000 gauss, the performance has reached the international level.