Product Name: Niobium nitride (NbN)

Specification: 0.8-10um (D50)

Shape: irregular

Color: Black gray

Features: high temperature superconductivity, ‌ high hardness, ‌ good wear resistance and corrosion resistance, ‌ excellent optical properties, ‌ high temperature stability, ‌ low specific gravity

Applications: Superconducting electronics, ‌ machining, ‌ optoelectronics, ‌ thermoelectric materials, ‌ aerospace and other fields

Niobium nitride 

CAS：24621-21-4 

chemical formula: NbN 

Purity: ≥ 99.5% 

Crystal: cubic 

Color: Black 

Relative density: 8.47 

Molecular weight: one hundred and six point nine one three 

Melting point: 2300 ℃; Generate heat -237 8kj/mol 

Mohs hardness: 8 

Microhardness: 14.3GPa 

Electrical resistivity: 200u. cm. Its superconducting transition critical temperature 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. 

2.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. 

Storage method: This product should be sealed and stored in a dry and cool environment. It should not be exposed to air for a long time to prevent moisture from causing aggregation, affecting dispersion performance and usage effect. In addition, it should be avoided from heavy pressure and not in contact with oxidants. It should be transported as ordinary goods.