Hexagonal boron nitride (h-BN) is an advanced ceramic material composed of boron and nitrogen atoms arranged in a layered hexagonal lattice. It shares a similar crystal structure with graphite, which gives it the nickname "white graphite". However, unlike graphite, h-BN exhibits outstanding thermal and chemical stability, making it a unique and valuable material in both research and industry. Its high thermal conductivity, electrical insulation, and lubricating properties have made it a popular choice for various applications across electronics, coatings, composites, and high-temperature environments.
Structural Characteristics
The crystal structure of h-BN consists of alternating boron and nitrogen atoms in a two-dimensional honeycomb arrangement. The strong covalent bonds within the layers give h-BN excellent in-plane strength, while weak van der Waals forces between layers allow easy sliding, providing solid lubrication properties. This layered structure also contributes to its outstanding thermal stability, with decomposition temperatures above 1000 °C in air and up to 3000 °C in inert atmospheres.
Exceptional Physical Properties
h-BN possesses a combination of exceptional physical properties that distinguish it from many other materials. It exhibits high thermal conductivity, surpassing that of most ceramics, while remaining an excellent electrical insulator. Its low coefficient of friction and high lubricity make it suitable for use in harsh environments where traditional lubricants fail. In addition, h-BN is lightweight, non-toxic, and has good machinability, allowing it to be shaped into components for specialized applications.
Typical Applications
Due to its unique combination of properties, h-BN is widely applied in advanced technological fields. In electronics, it is used as a substrate material and dielectric layer in high-performance devices, particularly in next-generation semiconductor applications. Its high thermal conductivity enables efficient heat dissipation in electronic circuits and LEDs. In the aerospace and defense industries, h-BN is employed in thermal shielding and insulation materials. It also serves as a solid lubricant in bearings, gears, and seals operating in extreme temperature environments where conventional oils or greases cannot be used.
Beyond traditional applications, h-BN has gained growing attention in the field of nanotechnology and materials science. Its two-dimensional nanosheets, often referred to as "white graphene", exhibit remarkable mechanical strength, chemical resistance, and flexibility. These nanosheets are being explored for use in energy storage, flexible electronics, and composite reinforcement. Additionally, h-BN coatings enhance surface properties such as wear resistance and corrosion protection, extending the lifespan of industrial components.
What We Offer
Alfa Chemistry has the capability to supply high-quality h-BN powder to meet the diverse needs of customers across multiple industries. The products we can offer are as follows:
| Catalog Number | Purity | Granularity | Boron Oxide | Total Oxygen | Carbon | Specific Surface Area |
| ALCM-BN-01 | >98.5% | 2–75 μm | <0.8% | <1.0% | <0.12% | 2-32 m2/g |
| ALCM-BN-02 | >99.0% | 2–75 μm | <0.4% | <0.7% | <0.1% | 2-32 m2/g |
| ALCM-BN-03 | >99.3% | 2–75 μm | <0.2% | <0.25% | <0.05% | 2-32 m2/g |
| ALCM-BN-04 | >99.6% | 2–75 μm | <0.08% | <0.18% | <0.03% | 2-32 m2/g |
With outstanding thermal stability, chemical resistance, and lubricating properties, our products can be applied across numerous industries. Should you have any requirements, please feel free to contact us.
