Introduction to Pyrolytic Boron Nitride (PBN)

by Izzy X. Product specialist

Pyrolytic Boron Nitride, abbreviated as Pyrolytic BN or PBN, also known as Chemical vapour-deposited Boron Nitride, Chemical Vapour-deposition of Boron Nitride or CVD-BN, etc.

Recommended Features

(1) Non-toxic and tasteless;
(2) High purity, reaching over 99.999%;
(3) It does not react with most molten metals, semiconductors and their compounds;
(4) The oxidation resistance is good under 1000;
(5) High resistance and good electrical insulation performance;

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The structure and morphology of PBN
Pyrolytic Boron Nitride (PBN) belongs to the hexagonal system and is a typical layered material. The inter-layer and intra-layer atomic distances are quite different, the inter-layer atomic distance is 3.33 , and the intra-layer atomic distance is 1.45 . The structure of PBN consists of B and N atoms arranged alternately in the layer and along the C axis, and the stacking method is ababab. It can be observed under a high-power microscope that PBN exhibits stacking faults, which causes its average interlayer spacing to be greater than the theoretical interlayer spacing. Since PBN grows along the C axis during the deposition process, it exhibits a high level of layer orientation, and the preferred orientation direction is the C axis.
PBN performance characteristics
PBN is an advanced material with excellent properties. It is deposited by the reaction of ammonia and boron halides under high temperature and high vacuum conditions. It can be deposited into PBN sheet materials or directly deposited into PBN final products such as tubes, rings or thin-walled containers. It is different from ordinary hot-pressed boron nitride (BN). It does not need to go through the traditional hot-pressed sintering process and does not add any sintering agent.

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