Hexagonal boron nitride (h-BN) is also known as white graphite. It is the only boron nitride phase in nature that belongs to the hexagonal system. As an isoelectronic body of graphite, h-BN has excellent insulation, thermal conductivity, and thermal stability. In addition, the high temperature resistance, chemical corrosion resistance, pressure resistance, anti-oxidation property and good neutron radiation shielding performance of h-BN also make it a new material with excellent performance and great development potential.
Figure 1. Top view and side view of h-BN .
- h-BN is a good lubricant at both low and high temperatures (up to 900°C, even in an oxidizing atmosphere). It can be used to reduce friction and wear in a variety of mechanical systems. In addition, since the lubricity of h-BN does not require water or gas molecules to be trapped between layers, h-BN lubricants can be used in a vacuum environment.
- Due to its excellent dielectric and thermal properties, h-BN is used as a substrate for semiconductors, a microwave transparent window, a heat conductive but electrically insulating filler in thermal pastes, and a structural material for seals.
- Due to the high electronegativity of nitrogen, h-BN is an electrical insulator with a large band gap. Therefore, the possibility of galvanic corrosion between h-BN and the underlying metal substrate is very low. h-BN has become a better alternative to anticorrosion coatings.
- h-BN can be added to ceramics, plastics, resins, rubbers, alloys and other materials to give them self-lubricating properties.
- h-BN is also used in the manufacture of cosmetics, dental cement, paints, pencil leads and so on.
|Chemical Name||Hexagonal Boron Nitride (h-BN) Powder|
|Formula Weight||24.82 g/mol|
|Particle Size||8-10 μm|
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- Satawara, A. M.; et al. Structural, electronic and optical properties of hexagonal boron-nitride (h-BN) monolayer: An Ab-initio study. Materials Today: Proceedings. 2021, 47: 529-532.