Niobium Nitride Powder

Niobium Nitride (NbN) is light gray and yellowish. Its melting point is 2300°C and heat of formation is -237. 8 kJ/mol. Its Mohs hardness is 8 and microhardness is 14.3 GPa. The resistivity of Niobium nitride is 200 µΩ·cm. The critical temperature of superconducting transition is 15.6 K. It is insoluble in hydrochloric acid, nitric acid and sulfuric acid, but dissolves in concentrated acid solution of hydrofluoric acid and sulfuric acid, also in hot alkali or high concentration alkali solution, and releases ammonia. When heated to 500-800°C in air, niobium pentoxide is formed and nitrogen is released. Niobium nitride decomposes into niobium in vacuum. It can form solid solution with titanium carbide, zirconium carbide, vanadium carbide and tantalum carbide.

Niobium nitride has high thermal and chemical stability, neutron irradiation resistance and is an excellent superconducting thin film material. It is prepared by sputtering in the mixture of argon and nitrogen. It is used to fabricate highly stable superconducting quantum devices.

Preparation

1. Niobium nitride can be prepared by direct method using niobium and nitrogen as raw materials. The comminuted metal niobium is sent into a nitriding furnace, and nitrogen or ammonia gas is introduced to make it react at 700-1100°C for 1-2 h to obtain niobium nitride. Nb + N → NbN.
2. In the presence of carbon, niobium pentoxide and nitrogen can also be used as raw materials to prepare niobium nitride. The reaction formula is as follows: Nb₂O₅ + 2N + 5C → 2NbN + 5CO. Carbon powder is added into the crushed metal niobium powder, fully mixed and sent into the reduction furnace. Then hydrogen and nitrogen are introduced, and niobium nitride is obtained by reduction reaction at 1250°C for 2h.

NCE provides Niobium Nitride (NbN) Powder with different particle sizes. Please contact us for more details. Get a Quote Now! For other ceramic materials, please check our Ceramics catalog page.

Typical Applications:

Niobium nitride can be used as an additive for cemented carbide and can also be used to make high-purity niobium.

Niobium nitride is a popular superconducting material because its “critical temperature” is relatively high in terms of its “body shape”. The critical temperature is the turning point from ordinary metal to superconductor. But like most superconductors, when deposited on nanodevices as thin films, the critical temperature is lower.

* Special requirements for the particle size is available.

Inquiries and orders should include the following information:

1. Quantity
2. Purity
3. Particle size (-325 mesh, or others on request)

Standard Packing: Packed in bags and loaded in drums. Special package is available on request.