boron nitride solid is the ideal material for many applications due to its exceptional properties. It has outstanding thermal and mechanical strength combined with excellent electrical isolation, making it a superior choice for high temperature components. It can withstand temperatures up to 2000degC in an inert atmosphere and up to 985degC in an oxidizing atmosphere.

Hexagonal boron nitride, also known as "white graphite," is the most widely used polymorph. It is the most commonly machinable and has excellent physical, thermal, and electrical properties.

Cubic boron nitride (c-BN) is similar in crystalline structure to diamond, and has many of the same properties. It is often used as a heat sink in semiconductor lasers and can be sintered or machined into many different shapes.

Wurtzite boron nitride is a very hard form of BN that has the same properties as cubic BN, but has much higher hardness. It is often used as a cutting tool for hardened steel, thermal spraying materials, and other tough applications.

Pyrolytic boron nitride, or PBN, is an ultra-high purity boron nitride that is grown by a Chemical Vapor Deposition process. It is suitable for the most demanding applications and can be produced in custom shapes, including crucibles for semiconductor and crystal growth applications.

Besides being a high purity boron nitride, it is chemically inert, non-wetting by glass and salts, and self-lubricating. This makes it an ideal material for a wide range of applications, such as Hall Effect Thrusters and refractory materials.