12045-19-1

Basic information

• Product Name: NIOBIUM BORIDE
• Synonyms: COLUMBIUM MONOBORIDE;COLUMBIUM BORIDE;COLUMBIUM BORIDE CBB;NIOBIUM BORIDE;NIOBIUM MONOBORIDE;niobiumboride(nbb);boranylidyneniobium;borylidyneniobium
• CAS NO: 12045-19-1
• Molecular Formula: BNb
• Molecular Weight: 103.72
• EINECS: 234-958-8
• Product Categories: Borides;Ceramics;Metal and Ceramic Science
• Mol File: 12045-19-1.mol
• Article Data: 7

Chemical Properties

• Melting Point: 2270°C
• Appearance: /gray orthorhombic crystals
• Density: 7.500
• CAS DataBase Reference: NIOBIUM BORIDE(CAS DataBase Reference)
• NIST Chemistry Reference: NIOBIUM BORIDE(12045-19-1)
• EPA Substance Registry System: NIOBIUM BORIDE(12045-19-1)

Safety Data

• Hazard Codes: Xi
• Statements: 36/37
• Safety Statements: 26-36
• WGK Germany: 3
• Hazardous Substances Data: 12045-19-1(Hazardous Substances Data)

Usage

Description

Niobium Boride, also known as Niobium Diboride (NbB2), is a refractory compound with a gray powder appearance and an orthorhombic crystal structure. It has a lattice parameter of a=0.3298 nm, b=0.872 nm, and c=0.3166 nm. Niobium Boride exhibits a resistivity of 64.5μΩ·cm at 25°C and is commonly prepared by hot-pressing boron with niobium or niobium hydride.

Uses

Used in Electronics Industry:
Niobium Boride is used as a sputtering target for producing wear-resistant and semiconductor films due to its high purity (99.5%) and unique properties.
Used in Nuclear Industry:
Niobium Boride is used as a neutron-absorbing layer on nuclear fuel pellets, taking advantage of its refractory nature and ability to absorb neutrons effectively.
Used in Aerospace Industry:
Due to its high melting point and resistance to wear, Niobium Boride is utilized in the aerospace industry for various high-temperature applications and components that require durability and resistance to wear.
Used in Ceramic Industry:
Niobium Boride's refractory properties make it suitable for use in the ceramic industry, where it can be employed in the production of high-temperature resistant materials and components.
Used in Metallurgy:
In the field of metallurgy, Niobium Boride is used to enhance the properties of certain alloys, such as increasing their high-temperature strength and resistance to wear.

InChI:InChI=1/B.Nb/rBNb/c1-2

Upstream product

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Relevant articles and documents

Synthesis and characterization of ternary layered Nb2SB ceramics fabricated by spark plasma sintering

In this paper, B-containing MAX phase of Nb2SB ceramics with high purity of 96 wt% (4 wt% NbB impurity) was successfully synthesized using the molar ratio of Nb: S: B = 2: 1.3: 1 by spark plasma sintering at 1350 °C under 30 MPa. The reaction path, microstructure, physical and mechanical properties were systematically studied. It is found that the formation of Nb2SB is from the combination of Nb, NbS2, and Nb5B6, or NbB and NbS. The full dense sample (RD 99.7%) possesses the fine grains about 6 μm in length and 3.6 μm in width. The grains of Nb2SB show a layered structure, which is same to other MAX phases. The thermal expansion coefficient is 7.1 × 10?6 K?1 in the range of 24–1100 °C. In the temperature range of 25–800 °C, the thermal diffusivity of Nb2SB ceramic increases from 5.58 mm2/s to 7.07 mm2/s. At 25 °C, the heat capacity is 0.36 J·g?1·K?1, the thermal conductivity is 13.79 W·m?1·K?1, and the electrical conductivity is 1.17 × 106 Ω?1·m?1. Additionally, the obtained Nb2SB ceramics exhibit excellent mechanical properties of Vickers hardness of 11.89 GPa (10 N load), flexural strength of 249 MPa, fracture toughness of 4.76 MPa·m1/2, and compressive strength of 1157 MPa.

Synthesis of niobium boride powder by solid state reaction between niobium and amorphous boron

Niobium boride powders were synthesized by solid state reaction between niobium metal powder and amorphous boron powder. The formation of niobium borides was found to be dependent on temperature. Single phases of the stable borides, NbB and NbB2, were formed by heating mixed powders corresponding to the stoichiometric compositions at 1000°C for 60 min. A single phase of Nb3B4 was obtained at a higher temperature of 1800°C as a result of the promoted diffusion of boron atoms in niobium metal. All synthesized powders were well dispersed and had particle sizes of 5 - 10 μm.