Pyrolytic Boron Nitride (PBN)

Pyrolytic Boron Nitride (PBN)

 

Pyrolytic boron nitride ceramic is prepared by CVD process (chemical vapor deposition), with all the boron nitride crystals grow parallel to the surface of which the vapor is deposited on. PBN is also called chemical vapor deposition boron nitride.

PBN is deposited by the reaction of ammonia and boron halide under high temperature and high vacuum conditions. It can be deposited to sheet / strip form, it can also be directly deposited to PBN final products such as tubes, rings and thin-walled containers (crucibles).

Compare to hot-pressed boron nitride (BN), no hot-press sintering process & binder are engaged. The material purity is higher than HBN since the raw material is high purity gas (BCl3 + NH3 –> BN +HCl), typical purity for PBN is 99.99%.

 

PBN is an advanced material with excellent properties, including

 

-Non-toxic and odorless;

-High purity & density

-No react with acid, alkali, salt and organic reagents at room temperature, and slightly corroded in molten salt or alkali solution, but it can resist corrosion of various acids at high temperature;

-No react with most molten metals, semiconductors and their compounds;

-The oxidation resistance is good below 1000 °C;

-Good thermal shock resistance

-The use temperature is high, there is no sublimation point, and it is directly decomposed into B and N above 3000 °C

 

Pyrolytic Boron Nitride (PBN) Applications

 

-Ideal container for elemental purification

-Widely used in aviation, aerospace, electronics, chemical, special metallurgy, medical and other fields.

-With its high density & purity, PBN is becoming a widely used material in vacuum processes.

-Ideal material to make crucibles for crystal growing, especially for the preparation of next-generation compound semiconductors such as GaAs, InP, etc.

Edgetech Industries Ceramics Division is a leading supplier of ceramic materials. We offer boride nitride products of high purity and with competitive price. Due to the CVD process, the thickness for PBN products are usually <3mm. Available PBN ceramic products includes: PBN crucibles (VGF / LEC / Conical / MBE / OLED), sheet, Tubes, strips, discs, ring, machined & custom parts, etc.

 

PBN Products