High purity Niobium sheet（Nb)3N5, The price is for reference only, please contact customer service for quotation.
element ： Nb
purity ： 3N5
shape ： Sheet
weight ： 1Kg
Package ： Vacuum packaging, carton, wooden box
Formal invoices are provided for all orders, and formal quotations and contracts are provided according to customer needs
Market reference price: $80/ Kg, The price is for reference only, please contact customer service for quotation.
Product Name: Niobium sheet
CAS No.: 7440-3-1
EINECS No.: 231-113-5
Melting point: 2468 ℃
Boiling point: 4742 ℃
Density: 8.57 g / cm ³
Specifications: various specifications and sizes can be customized according to customer requirements
Physical and chemical properties:
Niobium is a gray white metal with melting point of 2468 ℃, boiling point of 4742 ℃ and density of 8.57g/cm3. Niobium is a gray metal with luster and paramagnetism. High purity niobium metal has high ductility, but it will harden with the increase of impurity content
niobium is stable in air at room temperature, and is not completely oxidized when it is red hot in oxygen. It can be directly combined with sulfur, nitrogen and carbon at high temperature to form alloys with titanium, zirconium, hafnium and tungsten. It does not interact with inorganic acids or bases, nor is it soluble in aqua regia, but it is soluble in hydrofluoric acid
niobium metal is extremely stable in air at room temperature and does not interact with air. Although it has a higher melting point (2468 ° C) in the elemental state, its density is lower than that of other refractory metals. Niobium can also resist various erosion and form a dielectric oxide layer
the electropositivity of niobium is lower than that of zirconium on its left. Its atomic size is almost the same as that of tantalum atom below it, which is caused by lanthanide shrinkage effect. This makes the chemical properties of niobium very similar to that of tantalum. Although its corrosion resistance is not as high as that of tantalum, it is cheaper and more common. Therefore, it is often used to replace tantalum in the case of low requirements, such as coating material in chemical plant chemical tank
Niobium is a lustrous gray metal. High-purity niobium metal is more ductile, but hardens with increasing impurity content. Niobium has a very low capture cross section for thermal neutrons, so it is quite useful in the nuclear industry. Superconducting applications, superalloys, niobium-based alloys, medical applications, steel applications, electrical ceramics,
Others: Niobium (or doped with 1% zirconium) is a sealing material for high pressure sodium lamp arc tubes because the thermal expansion coefficient of niobium is very similar to that of sintered alumina arc lamp ceramic materials. This ceramic for sodium lamps resists chemical attack and does not react with the high temperature sodium liquid and gas inside the lamp. Niobium is also used in arc electrodes to weld certain stabilized stainless steels. In the cathodic protection system of some large water tanks, niobium is used as the anode material, and the anode is generally plated with a layer of platinum.