Hexagonal boron nitride (h-BN) ceramic powders have been widely used in various fields due to their excellent properties, including high-temperature resistance, insulation, lubricity, thermal conductivity, and chemical stability. The following is a brief introduction to their main application areas:

1. High-Temperature Lubrication and Mold Release

• High-Temperature Lubricants: h-BN powder has a layered structure, resulting in weak interlayer bonding and a low coefficient of friction. It also resists oxidation and decomposition at high temperatures (up to 900°C), making it suitable for use as a solid lubricant in high-temperature environments. It is suitable for lubricating high-temperature mechanical components in aerospace engines, metallurgical equipment, and other applications.

• Mold Release Agents: Due to their high chemical inertness, h-BN powders do not react with materials such as metals, glass, and ceramics and are released. They are commonly used as a release agent in processes such as metal casting, glass molding, and composite molding to reduce adhesion between the mold and the workpiece. 

2. Electronics and Semiconductors

• Heat Dissipation Materials: h-BN powder has a high thermal conductivity (up to 300–400 W/m·K in the planar direction) and excellent insulation properties (bandgap approximately 6 eV), making it an ideal heat dissipation filler for electronic packaging. Compounding it with polymers can produce highly thermally conductive and insulating electronic packaging materials for heat dissipation in devices such as chips and 5G base stations.

• Insulating Coatings: High-temperature insulating coatings can be applied to the surface of high-temperature electronic components to ensure their insulation performance at high temperatures, such as in high-temperature sensors and thermocouples.

• Semiconductor Substrates: h-BN has a high lattice match with graphene, a smooth surface, and excellent chemical stability. It can serve as a substrate for graphene growth, facilitating the development of two-dimensional semiconductor devices. 

3. Ceramic Material Preparation

• h-BN Ceramic Products: h-BN powder can be used as a raw material and sintered to produce h-BN ceramics. These ceramics feature high-temperature resistance (operating temperatures exceeding 2000°C), excellent thermal shock resistance, and superior dielectric properties. They can be used in high-temperature crucibles, thermocouple protection tubes, radar antenna covers, and other applications.

• Composite Ceramic Reinforcement: h-BN powder can be combined with other ceramics (such as alumina and silicon nitride) to improve the toughness, thermal shock resistance, and lubricity of the material, enabling the preparation of high-performance structural ceramics.

4. Other Applications

• Cosmetic Additives: h-BN powder exhibits excellent lubricity and gloss, is chemically inert, and is safe. It can be added to cosmetics (such as foundation and eyeshadow) to enhance the product's smooth application and gloss.

• Nuclear Industry: h-BN has a low neutron absorption cross-section and is resistant to high temperatures and corrosion, making it suitable as a moderator and structural material in nuclear reactors. In short, hexagonal boron nitride ceramic powder has shown important application value in many fields, such as high temperature, electronics, ceramics, and the chemical industry, due to its unique properties, and its application scope is constantly expanding with the development of technology.