Pyrolytic boron nitride ceramics are produced by a CVD process (chemical vapor deposition) where all boron nitride crystals grow parallel to the vapor-deposited surface.
PBN is also called chemical vapor deposition boron nitride.
PBN is formed by the reaction deposition of ammonia and boron halide under high temperature and high vacuum conditions. It can be deposited in sheet/strip form or directly onto PBN end products such as tubes, rings, and thin-walled containers (crucibles).
Compared to hot-pressed boron nitride (BN), the hot-pressed sintering process and binder are not used. The material purity is higher than HBN because the feedstock is a high-purity gas (BCl3 + NH3 –> BN + HCl), with a typical purity of 99.99% for PBN.
Excellent properties of Pyrolytic Boron Nitride (PBN) 
-Non-toxic and tasteless;
– High purity and density
– Does not react with acid, alkali, salt, and organic reagents at normal temperature, slightly corroded in molten salt or alkali solution, but can resist corrosion of many acids at high temperature;
– Does not react with most molten metals, semiconductors, and their compounds;
Good oxidation resistance below -1000℃;
– Good thermal shock resistance
– High operating temperature, no sublimation point, directly decomposes into B and N above 3000°C
Pyrolytic Boron Nitride (PBN) Applications
-An ideal vessel for elemental purification
-Widely used in aviation, aerospace, electronics, chemical industry, special metallurgy, medical treatment, and other fields.
– With its high density and purity, PBN is becoming a widely used material in vacuum processes.
-An ideal material for making crystal growth crucibles, especially for the preparation of next-generation compound semiconductors such as GaAs and InP.
Edgetech Industries Ceramics Division is a leading supplier of ceramic materials. We supply high-purity boron nitride products at competitive prices. Due to the CVD process, the thickness of PBN products is usually <3mm. Available PBN ceramic products include PBN crucibles (VGF / LEC / Conical / MBE / OLED), sheets, tubes, rods, discs, rings, machined and custom parts, etc.

PBN Products