Name: Niobium nitride
CAS: 24621-21-4
English name: NIOBIUM NITRIDE
Chemical formula: NbN
Purity: ≥99.5%
Crystal: cubic
Color: Black
Relative density: 8.47
Molecular weight: 106.913
Melting point: 2300℃; Heat of formation -237.8 kJ /mol
Mohs hardness: 8
Microhardness: 14.3GPa
Resistivity: 200u.cm. The critical temperature of superconducting transition is 15.6K.
Water soluble: insoluble in soluble and concentrated acid solution, but also soluble in hot alkali or high concentration lye, and release ammonia gas. When heated to 500 ~ 800℃ in the air, niobium pentoxide is generated and nitrogen is released.

Product Name: Niobium Nitride 
CAS：24621-21-4 
English name: NIOBIUM NITIDE 
Chemical formula: NbN 
Purity: ≥ 99.5% 
Crystal: cubic 
Color: Black 
Relative density: 8.47 
Molecular weight: 106.913 
Melting point: 2300 ℃; Generating heat -237.8kj/mol 
Mohs hardness: 8 
Microhardness: 14.3GPa 
Electrical resistivity: 200u. cm. The critical temperature for superconducting transition is 15.6K. 
Water solubility: insoluble in concentrated acid solutions, but also soluble in hot or high concentration alkaline solutions, and releases ammonia gas When heated to 500-800 ℃ in air, niobium pentoxide is generated while releasing nitrogen. 
Synthesis process: 
Send the crushed niobium metal into a nitriding furnace using niobium metal and nitrogen gas as raw materials, and introduce nitrogen or ammonia gas for reaction at 700 to 1100 ° C to directly synthesize niobium nitride. 
Purpose: 
1. Used as an additive for hard alloys and can also be used to produce high-purity niobium. When heated to 500-800 ℃ in air, niobium pentoxide is generated while releasing nitrogen. Niobium nitride decomposes into metallic niobium in vacuum. Niobium nitride can form solid solutions with titanium carbide, zirconium carbide, vanadium carbide, tantalum carbide, etc. 
Niobium nitride is a popular superconducting material because its "critical temperature" is relatively high in terms of its "shape", with a superconducting critical temperature of 17.3K. The upper critical magnetic field is 43T. The critical current density Jc (4.2K, 20T) is as high as 2 × 106A/cm2. High thermal and chemical stability, resistance to neutron irradiation, and excellent superconducting thin film materials. The critical temperature is the transition point from ordinary metals to superconductors, but like most superconductors, the critical temperature is lower when depositing thin films on nanodevices. Add superconducting material niobium nitride (two-dimensional crystalline layer) onto a nitride semiconductor substrate and directly grow niobium nitride NbNx thin film on an aluminum nitride AlN layer. When the temperature is below about 16 degrees above absolute zero, niobium nitride can become a superconducting material. 
3. Used for producing highly stable superconducting quantum instrument devices. 
Packaging and storage: This product is packaged in an inert gas filled plastic bag, sealed and stored in a dry and cool environment. It should not be exposed to air to prevent moisture from causing oxidation and aggregation, which may affect dispersion performance and usage effectiveness; The packaging quantity can be provided in separate packages according to customer requirements.