Pyrolytic Boron Nitride Plate | PBN Plate

Pyrolytic boron nitride (PBN) sheets are made using a chemical vapor deposition (CVD) process. The process involves the thermal decomposition of a gas mixture containing boron and nitrogen under controlled conditions. The process starts by placing a substrate, typically a graphite or silicon carbide material, into a reaction chamber. The substrate is heated to a high temperature, usually above 1800°C, and a gas mixture containing boron and nitrogen is introduced into the chamber. The gas mixture can include boron trichloride (BCl3) and ammonia (NH3), which react to form boron nitride (BN).
As the gas mixture flows over the substrate, the boron and nitrogen atoms react to form a thin film of boron nitride on the substrate surface. The process is repeated multiple times to build up the thickness of the boron nitride film to the desired thickness.

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