Characteristics and application fields of boron nitride powder BN

Characteristics and application fields of boron nitride powder BN Boron Nitride BN is a high-performance ceramic material with unique structure and properties, and is known as "white graphene". According to the different crystal structures, boron nitride is mainly divided into hexagonal boron nitride (h-BN) and cubic boron nitride (c-BN), which are significantly different in performance and application. Main characteristics of boron nitride powder Hexagonal boron nitride (h-BN) -graphite-like layered structure, low friction coefficient (0.2~0.4), and still maintain lubrication performance at high temperature. -The melting point is about 3000℃, and it can be used stably above 1000℃ (up to 2800℃ in inert atmosphere). -Resistant to acid and alkali corrosion (except strongly oxidizing acids), and does not wet most metal melts (such as aluminum and copper). -High resistivity (> 10¹⁴ Ω·cm) and high dielectric strength, suitable for high-temperature insulation environment. High thermal conductivity (30 ~ 60 W/m k) and anisotropic (better thermal conductivity along the layer direction). -The low density is about 2.27 g/cm³, and the advantage of light weight is obvious. Cubic boron nitride (c-BN) -Ultra high hardness -Oxidation resistance -Wear resistance Production mode of boron nitride powder Preparation of hexagonal boron nitride (h-BN) -chemical vapor deposition (CVD) 2. Preparation of cubic boron nitride (c-BN) -High temperature and high pressure method (HPHT) Application field of boron nitride powder Application of hexagonal boron nitride (h-BN) -High temperature lubricant -Release agent to prevent adhesion in glass and metal casting. -Thermal conductive filler, which enhances the thermal conductivity of plastics and rubber (such as LED heat dissipation substrate). -Electrical insulating materials, insulating layers in high-voltage equipment and semiconductor packages. -Cosmetic additives to enhance skin feeling, used for high-end foundation and loose powder. 2. Application of cubic boron nitride (c-BN) -superhard cutting tools -Abrasive abrasives -Wear-resistant coating -Heat dissipation of electronic devices -Neutron absorbing material -Quantum materials Nano-boron nitride * can improve the properties of composites (such as enhancing polymer mechanics/thermal conductivity). With its unique performance combination, boron nitride plays an irreplaceable role in high-end manufacturing, electronics, energy and other fields, and its application scope will be further expanded with technological progress in the future.