Hexagonal boron nitride (h-BN) is an excellent lubricant and can be used for a variety of applications. This lubricant works very well in high-temperature conditions, and it is also highly resistant to vibration and noise and can protect against corrosion. It is a very useful material for various industries including aerospace, military technology, and manufacturing. The lubrication effect of hexagonal boron nitride enables machinery and equipment to operate more smoothly and efficiently. It also helps to improve the service life of engines and machinery.

Hex BN powders can be combined with liquid lubricants, like mineral oil, to create a lubricating dispersion. The h-BN nanoparticles settle in the gaps between the sliding surfaces, where they form a tribofilm that reduces friction and wear. The tribofilm also protects the sliding surface against oxidation and abrasion. Moreover, the lubricant is non-toxic, inert, and environmentally friendly.

Hex BN can be added to metal powders and sintered to make self-lubricating powder metallurgy products such as oil-free bearings, sliding materials, and contacts. It is suitable for use in many applications, including ceramics and semiconductors, where it can improve friction resistance and stability. Moreover, it can improve the performance of abrasion-resistant materials such as Si3N4 and improve its wear resistance. Compared to graphite, the lubricating properties of h-BN are more stable at high temperatures and are less sensitive to speed, pressure, and oxidation. The strong covalent bonding within the basal planes of h-BN and the weak interaction between them cause high anisotropy in its hardness, electrical conductivity, and thermal expansion properties.