Niobium is a grey-white metal with melting point of 2468℃, boiling point of 4,742 ℃, and density of 8.57g/cm3. Niobium is stable in air at room temperature, and cannot be fully oxidized in oxygen even when it’s hot and turns red; it can directly compound with sulfur, nitrogen, and carbon at high temperature, can form alloys with titanium, zirconium, hafnium, and tungsten. It has no chemical action with inorganic acids or alkali; it is not dissolved in aqua regia, but can be dissolved in hydrofluoric acid. Niobium has oxidation states of -1, + 2, + 3, +4 and +5, in which +5 compound is most stable.
Basic Characteristics
Chemical symbol: Nb
Atomic number: 41
Atomic weight: 92.91
Density: 8.55g/cm3 at 20°C
Melting point: 3017°C
Boiling point: 5505°C
Specific heat capacity: 140J/kg x K at 20°C
Heat conductivity: 57.5W/m x K at 20°C
Atomic number: 41
Atomic weight: 92.91
Density: 8.55g/cm3 at 20°C
Melting point: 3017°C
Boiling point: 5505°C
Specific heat capacity: 140J/kg x K at 20°C
Heat conductivity: 57.5W/m x K at 20°C
Quality Assurance
Our study on refractory metals for decades enables us to fully understand their characteristics and features. We are your best choice as a provider for both pure niobium and niobium alloy products. From purchase of raw materials until the final production, we employ the most advanced testing equipment to ensure delivery of flawless and top quality products to you; our experienced technicians can also meet your demanding requirements on product details.
Application
Semiconductor industry, and electronic industr
Niobium and niobium alloy bars, wire are widely used in chemical, electronics, aviation and aerospace fields because of its high melting point, corrosion resistance, good cold working properties and other characteristics. The density of niobium is 8.57g/cm3. Niobium and niobium alloy bars are used for the structural materials of aircraft engines, internal components and sheath materials for rocket nozzles, reactor, and a variety of corrosion-resistant parts for resisting the nitric acid, hydrochloric acid or sulfuric acid. Adding zirconium into niobium can significantly improve the oxidation resistance and strength of the material. Niobium and niobium-zirconium alloy wire are extensively used to manufacture high-pressure sodium lamps and electrolytic capacitor anode lead.
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