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Xi'an Zhiyue Material Tech. Co., Ltd.
Xi'an Zhiyue Material Tech. Co., Ltd.

Niobium Diboride Powder (NbB2)

Niobium diboride powder, as a high covalent refractory ceramic material with a hexagonal crystal structure, has shown wide application value in multiple fields due to its unique physical and chemical properties. Its melting point is as high as 3050 ° C, and its density is relatively low, about 6.97g/cm ³， Simultaneously possessing good high-temperature strength, it has become an ideal candidate material for high-temperature aerospace applications. In addition, niobium diboride powder also has high superconducting transition temperature performance, which is outstanding in superconducting materials. In the field of biomedicine, it has become a high-quality material for CT scanning and X-ray therapy due to its high density, high absorption rate, and good X-ray transparency. In summary, as a type of boride powder, niobium diboride powder provides strong support for modern technology and industrial development due to its excellent performance and wide range of applications.


purity: ≥ 99.9% 

Particle size: -325 mesh

CAS: 12045-19-1

  • niobium diboride powder
  • niobium diboride powder

Product Overview

  • Chemical Formula: NbB₂

  • CAS Number: 12007-29-3

  • Purity: ≥99.5% or ≥99.9%

  • Particle Size Options: 1–5 µm, 5–10 µm, nano grade (<100 nm), custom mesh sizes

  • Appearance: Dark gray to black crystalline powder

  • Packaging: Vacuum-sealed aluminum foil bags or inert-gas-filled containers

  • Synthesis Method: Carbothermal reduction / solid-state reaction



Key Advantages of Zhiyue’s NbB₂ Powder

PropertyPerformance Benefit

Ultra-High Melting Point (~3050 °C)

Ideal for aerospace, reentry systems, and hypersonic vehicle coatings.

Excellent Thermal Conductivity

Promotes rapid heat dissipation in high-temperature composites.

Oxidation Resistance

Forms a self-healing boron oxide (B₂O₃) layer above 1000 °C, extending material service life.

High Hardness (~28–32 GPa)

Enhances wear resistance in cermets, tooling, and protective coatings.



Where Is Niobium Diboride Used?

NbB₂ powder is widely used in the following application areas:

  • Ultra-High Temperature Ceramics (UHTCs)
    Commonly combined with ZrB₂, SiC, or HfB₂ in TPS tiles, leading edges, and combustion liners in aerospace systems.

  • Thermal Spray & PVD Coatings
    Niobium diboride is used as a feedstock for coatings requiring thermal shock resistance and surface protection at extreme temperatures.

  • Advanced Sintered Components
    Utilized in hard-facing materials, nozzles, or crucibles subjected to high thermal flux and corrosive environments.

  • Composite Reinforcements
    Added to metal or ceramic matrices to improve mechanical performance, oxidation resistance, and electrical conductivity.


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