1. Utilizing the good high temperature resistance and insulation properties of boron nitride products, they can be used as electrical insulation materials at high temperatures and have excellent thermal shock resistance.
2. In the electronics industry, its thermal conductivity and penetration of microwave radiation are used as the transmission window of radar.
3. Boron nitride products can be used as high-temperature metal smelting crucibles, heat-resistant materials, heat sinks and thermal conductive materials due to their high melting point, small thermal expansion coefficient and almost stability to molten metal.
4. The thermal conductivity of hot-pressed hexagonal boron nitride is equivalent to that of stainless steel, and does not change much with temperature. The thermal conductivity is better than BeO below 900°C. Hexagonal boron nitride has low thermal expansion coefficient and elastic modulus, so it has excellent thermal stability and can be used under repeated rapid cooling and heating conditions from 1500°C to room temperature.
5. Boron nitride has good corrosion resistance to acids, alkali and glass slag, and is not resistant to most molten metals such as Fe, Al, Ti, Cu and Si, as well as gallium arsenide, cryolite and glass melt. It does not react when wetted, so it can be used as crucibles, vessels, pipes, transfer pumps and other components for melting non-ferrous metals, precious metals and rare metals. It can also be used as boron single crystal melting vessels, glass forming molds, and horizontal continuous casting separation rings. , thermocouple protection tubes, etc., and can also be used to manufacture containers for semiconductor materials such as zinc arsenide, gallium phosphide, and indium phosphide, heat dissipation bottom plates for semiconductor packages, and P-type diffusion sources for semiconductors and integrated circuits.
6. After replacing the conventional alumina protective tube with a boron nitride thermocouple protection tube, due to its good thermal conductivity and increased temperature control accuracy, the kiln has a significant energy saving effect and increases the product qualification rate, which brings benefits to the enterprise. Better economic benefits.
7. Boron nitride is both a good conductor of heat and an insulator of electricity. Its breakdown voltage at high temperatures is 4-5 times that of alumina, and its dielectric constant is one-half that of alumina. It is still an electrical insulator at 2000°C and can be used as a high-temperature insulating material. Boron nitride is transparent to microwaves and infrared rays and can be used as a window that transmits infrared and microwaves (such as a radar window).
8. Due to the existence of boron atoms, boron nitride has strong seed absorption ability. It is mixed with plastic and graphite in the atomic energy industry and can be used as a shielding material for atomic piles.
9. Boron nitride has stable performance under high pressure and can be used as a container for pressure transmission materials. Boron nitride is a lightweight ceramic material that is advantageous as a high-temperature structural material for aircraft and spacecraft.
