Hexagonal boron nitride is a high-temperature lubricant with an exceptionally low coefficient of friction, and it remains stable even in extreme heat—its performance does not increase as temperatures rise. This unique property gives it a natural advantage in high-temperature lubrication applications, which is why it has been increasingly adopted across a wide range of industrial settings requiring reliable lubrication under intense heat conditions.

　　In mechanical applications, hexagonal boron nitride, with its unique crystal structure, can be formulated into solid lubricants that are directly applied to the surfaces of mechanical components, significantly reducing friction between moving parts. Alternatively, it can be incorporated into liquid lubricants to create a durable lubricating film. This versatile application allows hexagonal boron nitride to maintain excellent lubrication performance even under high-temperature conditions, offering notable advantages in extending the lifespan of mechanical components and minimizing energy consumption. Additionally, when used as a solid lubricant, hexagonal boron nitride can be dispersed in heat-resistant lubricating oils, water, or solvents and applied to friction surfaces via spraying. Once the solvent evaporates, a dry lubricating film forms, providing long-lasting protection and smooth operation.

　　During the forging process of special alloys, a glass-based oxygen inhibitor is typically applied as a coating onto the billet itself. This not only helps minimize oxidation of the billet during heating but also serves as an effective lubricant for the forging operation. However, these glass-based inhibitors often fall short in providing optimal lubrication, prompting manufacturers to apply an additional layer of graphite onto the die to enhance lubrication during forging. Importantly, the solvents used in the application and removal of the glass-based oxygen inhibitors can pose significant environmental risks due to their potential to pollute the surrounding ecosystem. As a result, this conventional manufacturing process fails to align with the goals of sustainable, "green" production. To address this issue, researchers have proposed replacing the traditional glass-based oxygen inhibitors—and even the graphite—entirely with water-soluble hexagonal boron nitride. Not only does hexagonal boron nitride offer superior lubricating properties, but it also eliminates the need for harmful solvents altogether. Moreover, despite its higher initial cost compared to conventional materials, switching to hexagonal boron nitride actually keeps production costs stable. Ultimately, this innovative approach not only improves the working conditions in forging facilities by reducing exposure to hazardous substances but also positions the forging industry squarely within the realm of eco-friendly, green manufacturing practices.

　　Research on the friction and electrical properties of hexagonal boron nitride can be applied as a mold-release agent in metal forming, an insulator for high-voltage and high-frequency electricity and plasma arcs, an anti-stick coating for optical glass, a crucible for various aluminum-plating processes, a separation ring used in continuous steel casting in metallurgy, and a lubricant for metal wire drawing, among other applications. This highlights that in-depth studies of hexagonal boron nitride nanomaterials in related fields such as biotechnology, aerospace, energy, and electronics hold significant scientific value as well as substantial socio-economic importance.