What is boron nitride ceramic material

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What is boron-nitride?
Boron Nitride crystal is part of the hexagonal crystal systems. It has a structure similar to graphite. Many similarities make it also known as “white graphite”.

Characteristics of Boron Nitride

It has excellent heat resistance, thermal stability and thermal conductivity. This makes it an ideal heat dissipation and high temperature insulation material. Boron Nitride is chemically stable, and it is resistant to corrosion from most molten metallics. It is also very self-lubricating. Boron nitride products can be machined up to 1/100mm accuracy and have a low hardness.



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boron nitride

Boron nitride can also be used to make crucibles that melt semiconductors and high temperature containers for metallurgy. It can also be used for the production of semiconductor heat-dissipating insulation pieces, high-temperature bearings and thermowells.

A graphite structure, also known by white graphite, is what boron Nitride is most commonly obtained. Another type is called diamond type. Like the conversion of graphite into a diamond, graphite type boron is also possible to be made into diamond-type Boron Nitride at high temperatures (1800degC), and high pressure (800Mpa). This boron-nitride’s B-N bond length (156pm), is comparable to that of diamond’s C/C bond length (154pm). It has the same density as diamond. It is similar in hardness to diamond, and it is more resistant to heat than diamond. It is a superhard material that can withstand high temperatures and is ideal for cutting tools, drills, and abrasives.

Boron Nitride Structure

Boron nitride has a hexagonal crystal. This is usually a graphite-type boron nitride. However, there are also amorphous varieties. Other than the hexagonal crystal form of boron carbide, there are other crystal forms. Graphene-like 2D boron nitride crystallines have also been found (similarly to MoS:2D crystals).

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