Boron Nitride Powder

1. Meaning
Boron nitride crystals belong to the hexagonal crystal system, with a structure similar to graphite and many similarities in properties, so they are also called “white graphite”.
2. Performance
It has good heat resistance, thermal stability, thermal conductivity, and high-temperature dielectric strength, making it an ideal heat dissipation material and high-temperature insulation material. Boron nitride has good chemical stability and can resist corrosion from most molten metals. It also has good self-lubricating properties. Boron nitride products have low hardness and can be machined with an accuracy of 1/100mm.
3. Purpose:
Boron nitride can be used to manufacture crucibles for melting semiconductors, high-temperature containers for metallurgy, semiconductor heat dissipation insulation parts, high-temperature bearings, thermocouple sleeves, and glass forming molds.
The commonly produced boron nitride has a graphite type structure, commonly known as white graphite. Another type is diamond type, which is similar to the principle of graphite transforming into diamond. Graphite type boron nitride can be transformed into diamond type boron nitride at high temperature (1800 ℃) and high pressure (800Mpa). This boron nitride has a B-N bond length (156pm) similar to diamond’s C-C bond length (154pm) and a density similar to diamond. Its hardness is comparable to diamond, but its heat resistance is better than diamond. It is a new type of high-temperature resistant superhard material used in the production of drill bits, grinding tools, and cutting tools.