Boron nitride is a crystal composed of nitrogen and boron atoms in a variety of variants, and has a wide range of applications in fields such as electrical engineering, metallurgical industry, chemical industry, aerospace, automotive industry, nuclear industry, healthcare and laser technology. Boron nitride has excellent properties, such as high thermal conductivity, electrical insulation, corrosion resistance, abrasion resistance and lubricity, which make it play an important role in different fields.