The Advantages And Uses Of Boron Nitride Products
Dec 15, 2022
BN is usually in the hexagonal crystal form (similar to graphite), which can be transformed into a cubic crystal form (similar to diamond superhard material) under high temperature and ultra-high pressure. It has excellent thermal shock stability, good acid and alkali corrosion resistance, and can be machined. It can reach 2800°C when used in an inert atmosphere.
1.Because BN has high thermal conductivity, electrical insulation, low density, high reflectivity performance, and excellent dry lubrication performance
Good mold compatibility for synthesis, extrusion and injection molding processes allows it to be formulated into many thermoplastics, elastomers, thermosets and adhesives. They help dissipate heat in consumer electronics and improve thermal management efficiency in high-capacity batteries, LEDs, and automotive applications. BN fill compounds functionally combine thermal management with electrical insulation, while also enabling lighter, simpler component designs that can reduce overall system cost.
2. In the electronics industry, it is used as a transmission window for radar by using its thermal conductivity and penetrating performance to microwave radiation.
3. The thermal conductivity of hot-pressed hexagonal BN is equivalent to that of stainless steel, and does not change much with temperature, and its thermal conductivity is better than BeO below 900 °C. Hexagonal BN has a low thermal expansion coefficient and elastic modulus, so it has excellent thermal stability and can be used under repeated rapid cooling and rapid heating conditions from 1500 ° C to room temperature.
4. BN has good corrosion resistance to acid, alkali and glass slag, and is neither wet to most molten metals such as Fe, Al, Ti, Cu and Si, etc., as well as gallium arsenide, cryolite and glass melt. It also does not react, so it can be used as crucibles, vessels, pipes, delivery pumps and other parts for melting non-ferrous metals, precious metals and rare metals. It can also be used as boron single crystal melting vessels, glass forming molds, horizontal continuous casting separation rings, thermoelectric Couple protection tubes, etc., can also be used to manufacture containers for semiconductor materials such as zinc arsenide, gallium phosphide, and indium phosphide, heat dissipation bottom plates for various semiconductor packages, and P-type diffusion sources for semiconductors and integrated circuits.
5. The boron nitride thermocouple protection tube is used to replace the conventional alumina protection tube. Because the thermal conductivity of the boron nitride thermocouple protection tube is better, the temperature control accuracy is improved, the power saving effect of the kiln is remarkable, and the product qualification rate is improved. , can bring better economic benefits to the enterprise.
6. Due to the existence of boron atoms, boron nitride has a strong ability to absorb seeds. It is used in the atomic energy industry in combination with various plastics and graphite, and can be used as a shielding material for atomic piles.
7. BN is stable under ultra-high pressure and can be used as a container for pressure transmission materials. BN is the lightest ceramic material, which is very beneficial for high-temperature structural materials of aircraft and spacecraft
