Boron nitride composite combines the excellent properties of boron nitride with other materials, featuring high hardness and wear resistance, high thermal stability, good chemical inertness, excellent electrical insulation, good thermal conductivity, good self-lubricity, and good creep resistance. The following is a detailed introduction to its characteristics:
High Hardness and Wear Resistance: Boron nitride itself possesses high hardness, second only to diamond. Composite boron nitride materials inherit this characteristic, offering excellent wear resistance. They are suitable for manufacturing cutting tools, abrasives, and can significantly enhance tool lifespan and processing efficiency.
High thermal stability: The heat resistance of boron nitride can reach 1400~1500°C, almost double that of diamond (700~800°C). Composite boron nitride materials maintain stable properties under high-temperature environments, suitable for high-temperature processing and metallurgical industries.
Excellent Chemical Inertness: Boron nitride does not wet nor react with most metal melts, offering good chemical stability. Composite boron nitride materials also inherit this property, maintaining stability in harsh chemical environments, suitable for manufacturing crucibles and boats for melting and evaporating metals.
Excellent electrical insulation: Boron nitride boasts high electrical insulation properties, making it suitable for insulators in high-voltage, high-frequency electrical applications and plasma arcs, as well as insulators for various heaters. Composite boron nitride materials also exhibit good electrical insulation characteristics, which are ideal for manufacturing electronic devices.
Excellent thermal conductivity: Boron nitride boasts high thermal conductivity, allowing for rapid heat transfer. Composite boron nitride materials excel in applications requiring heat dissipation, such as semiconductor package heat sinks and phase shifter heat bars.
Excellent self-lubricating properties: Hexagonal boron nitride has a layered structure similar to graphite, with weak bonding between layers, allowing easy sliding between adjacent layers, thereby providing lubrication. Composite boron nitride materials also exhibit excellent self-lubricating properties, suitable for manufacturing high-temperature lubricants.
Excellent creep resistance: Under high-temperature loads, the boron nitride interfaces in the composite boron nitride materials can form a thick liquid boron oxide, which has self-healing properties. It effectively prevents oxygen atoms from diffusing into the material and fibers, protecting the fibers and significantly enhancing the material's creep resistance and lifespan.
