Boron Nitride Protective Tubes

Boron nitride ceramic material is also known as white graphite. The mechanical properties of hBN are close to isostatic graphite, while BN is an excellent insulator. BN has high dielectric constant and is resistant to arc corrosion. This makes it an ideal material to make components in PVD equipment.
The composite of boron nitride and aluminum nitride AlN-BN has higher much mechanical strength and higher thermal conductivity than pure boron nitride. Although BN components made by these composite materials are more expensive and difficult to process, their service life is significantly longer in a lot of circumstance.
For insulators, the typical boron nitride insulators are smaller than 12" dia x 16" length due to the limitation of our equipment and stocked materials. Large BN insulators could be built by connecting shorter tubes together, with staged joint presented below or threaded joint.

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