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Transition Metal Borides

Transition-metal borides (TMBs) are intermetallic compounds formed by bonding boron atoms with transition-metal elements such as magnesium, tantalum, niobium and chromium. They combine the exceptional hardness and high melting-point properties of ceramics with the excellent electrical and thermal conductivity of metals. These materials generally feature ultra-high melting points (some above 3000 °C), extreme hardness, outstanding wear- and corrosion-resistance, and high-temperature chemical stability. They carry critical strategic application value in superconducting technologies, ultra-high-temperature ceramics (UHTCs), thermal protection for extreme-environment conditions, and cutting-edge electronics.

BoronHub specializes in R&D and high-purity custom manufacturing of the core transition-metal boride products listed below:

Magnesium Diboride (MgB₂) CAS-No.: 12007-25-9; Melting point: 830 °C; Density: 2.57 g/cm³; Crystal structure: hexagonal system. A practical mid-temperature superconducting material with a critical temperature of approximately 39 K. It plays a central role in helium-free MRI medical-imaging systems, superconducting wires for wind-power generators, superconducting power-transmission lines, and high-energy-physics electronic components.

Tantalum Diboride (TaB₂) CAS-No.: 12007-35-1; Melting point: approx. 3040 °C; Density: approx. 12.7 g/cm³. A representative ultra-high-temperature ceramic (UHTC) and ultra-hard structural material. Boasting an extremely high melting point and excellent erosion resistance, it is widely deployed in thermal-protection systems for hypersonic vehicles, aerospace nozzles, and special-purpose coatings operating under highly corrosive extreme environments.

Niobium Diboride (NbB₂) CAS-No.: 12007-29-3; Melting point: approx. 3050 °C; Density: approx. 6.97 g/cm³. A special ceramic material with superior high-temperature stability, electrical conductivity and corrosion resistance. It is commonly used as a reinforcing additive phase in ultra-high-temperature composites, wear-resistant coatings for extreme environments, and key structural material for civil-nuclear-energy applications.

BoronHub can reliably supply high-purity transition-metal boride powders with customizable particle-size distributions (from micron down to nanometer scale), as well as corresponding high-density sintered parts. We fully support manufacturing requirements across global high-tech sectors including aerospace, medical superconductivity, newenergy and state-of-the-art electronics.

99.9% Purity Magnesium Diboride (MgB₂) Cas No.12007-25-9
Magnesium diboride (MgB₂) is a hexagonal intermetallic compound with a superconducting transition temperature of approximately 39 K, ranking among the highest critical temperatures of all metallic-compound superconductors, with practical operating temperatures of 20–30 K. Its alternating layers of magnesium and boron offer abundant resources, low cost, high electrical conductivity and ease of synthesis and processing, and it can be manufactured into thin films and wires. BoronHub supplies micron-grade spherical magnesium diboride powder with 99.9% purity and particle sizes covering 1–5 μm and 5–10 μm; nano-scale, ultra-fine and spherical powders can also be customised on request. The material is compatible with vacuum sintering, magnetron sputtering and powder metallurgy, and is widely used in superconducting materials, electronic ceramics, conductive composite materials and cutting-edge scientific research.
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99.9% Tantalum Diboride (TaB₂) Cas No.12007-35-1
Tantalum diboride (TaB₂) is a ceramic material featuring high hardness, an ultra-high melting point and good electrical conductivity. It melts at approximately 2,900–3,040 °C, has a density of 9.14 g/cm³, and appears as grey, metallic-lustre crystals. It offers excellent oxidation resistance, chemical stability and corrosion resistance, while retaining good electrical and thermal conductivity. BoronHub supplies high-purity TaB₂ powder with purity up to 99.9% and above, no impurity phases detected by XRD, narrow particle-size distribution and customizable grades. The product is widely used in ultra-high-temperature ceramics (UHTCs), hard materials, composite reinforcements, spacecraft coatings, the electronics industry and civilian protective applications.
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99.9% Niobium Biboride(NbB₂) Cas No.12007-29-3
Niobium Biboride (NbB₂) is a high-covalency refractory ceramic material with a hexagonal crystal structure, belonging to the family of Ultra-High-Temperature Ceramics (UHTC). It has a melting point as high as 3050 °C and a density of approximately 6.97 g/cm³. It combines high hardness, good metallic-type electrical and thermal conductivity, outstanding resistance to molten-metal corrosion, superconductivity and irradiation resistance. BoronHub supplies high-purity niobium diboride powder with purity up to 99.99%. XRD testing detects no impurity phases. The powder features a narrow particle-size distribution, irregular particle morphology and a dark-grey colour. This product is widely used in advanced fine ceramics, superconducting materials, gold brazing fillers, nuclear-waste treatment and microelectronic manufacturing. It is a critical material for aerospace, nuclear engineering and high-end electronics industries.
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