Boron nitride is a synthetic ceramic with crystal structures similar to carbon. Saint‑Gobain manufactures hexagonal boron nitride, a graphite‑like form that appears as a white, lubricious powder. This structure gives BN a unique combination of thermal, electrical, chemical, and mechanical properties.
About Boron Nitride
What is hBN?
Thermal Properties
Boron nitride offers exceptionally high thermal conductivity while remaining electrically insulating. It also provides excellent thermal shock resistance. As a powder, BN improves heat dissipation in polymers for thermal management. In solid form, its stability and inertness enable use in high‑temperature and molten metal processes.
Electrical Properties
Boron nitride is an outstanding electrical insulator with high dielectric strength and very low dielectric loss. These properties make it ideal as a dielectric cooling filler in polymer compounds used in LEDs, power electronics, and high‑frequency or RF applications where reliability and performance are critical..
Chemical Properties
Strong covalent bonding gives boron nitride excellent chemical stability. It resists oxidation and corrosion, even in demanding high‑temperature environments such as steel processing and ceramic manufacturing. BN is also non‑toxic, enabling its use in cosmetics and non‑contact food‑grade lubricant applications.
Mechanical Properties
Boron nitride combines low friction, non‑abrasive behavior, and oxidation resistance. These features make it effective as a release agent, lubricant additive, and machining material. Its low hardness allows precise machining of components such as nozzles, break rings, and side dams used in metal processing.
Optical Properties
Boron nitride enhances the optical appearance of coatings, varnishes, and cosmetic formulations. Platelet size can be selected to control opacity and finish, from matte to glossy. BN also absorbs oil and provides optical blurring to reduce the appearance of fine lines or surface defects.
