Boron-Nitride-Coating Grade B
• high temperature release agent for pressure sintering
• produces diffusion barriers
• yields non-wetting surfaces
• for the coating of graphite
• prevents carbide formation with the production of hard materials
• contains "white graphite"


Boron-Nitride-Coating Grade B is a special coating on the basis of boron nitride for the coating of sinter graphites. This coating shows is easily applied and shows a good adhesion even on could sinter moulds. It is used for the production of hard metals and diamond tools. Boron-Nitride-Coating Grade B forms diffusion barriers and suppresses effectively the formation of carbides. As a quick drying version the product Boron-Nitride-Coating Grade E is available.


• Resuspend or shake Boron-Nitride-Coating Grade B prior to use. Dilute with distilled water if necessary.
• Application on clean surfaces is possible by painting or spraying. Additional layers may be applied after drying. Small components can be also dipped. Porous grphites should be damped before applying this coating.
• A thin coating application (50-150µm) is favourable. Thick layers may crack during use and chip off.

Storage-Container Size

Boron-Nitride-Coating Grade B must be protected against frost. A storage temperature of >5°C (>41°F) is recommended. The containers should be kept closed. Boron-Nitride-Coating Grade B is available in 1kg-containers.

Technical Data



Ceramic Constituent

Boron nitride

Solid Content (boron nitride)



1.1 g/cm³

Temperature (max. Application)

1000°C (1832°F) (at air)

1800°C (3272°F) (under inert gas)


© 2023 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst

These recommendations are believed to be correct. However, no guarantee of their accuracy is given. Therefore, purchasers shall make their own tests to determine suitability for their use. These products are offered for industrial and related uses (e.g. research and development) only. However the user must take the necessary precautions appropriate for products containing chemicals. This description does not imply the absence of any patents, the responsibility whatsoever solely rests with the user.