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PBN Crucible, Pyrolytic Boron Nitride Crucible

PBN Crucible, Pyrolytic Boron Nitride Crucible

PBN crucible, also known as pyrolytic boron nitride crucible, is a type of high-performance crucible made of pyrolytic boron nitride (PBN) material. PBN crucibles are characterized by their high thermal conductivity, high purity, and excellent chemical resistance. They are commonly used in high-temperature and high-vacuum applications such as semiconductor, aerospace, and defense industries.

The manufacturing process of PBN crucibles involves pyrolyzing a gas mixture of boron trichloride and ammonia at high temperatures to form a thin film of boron nitride on a graphite substrate. The substrate is then dissolved, leaving behind a pure PBN crucible.

PBN crucibles have several advantages over other types of crucibles, such as graphite and quartz. They have a high thermal shock resistance, allowing them to withstand rapid temperature changes without cracking or breaking. They also have a low coefficient of thermal expansion, which makes them less prone to warping or deformation at high temperatures. Additionally, PBN crucibles have a low outgassing rate, making them suitable for use in high-vacuum environments.

PBN crucibles are available in various sizes and shapes, including cylindrical, rectangular, and custom designs. They can also be coated with graphite or other materials to enhance their properties.

Boron Nitride Ceramics Specification

CG Material production formulations are developed to address the varied application problems in which ceramic components are commonly used. Many industrial applications push the envelope on specific requirements leading to the development of new formulations to successfully address them.

Item No. Description Purity Lot Size
CG-NI05-98 Boron Nitride Powder
Particle Size: 3 µm, 200 mesh or 325mesh
BN > 98 %,
B2O3 < 0.6%,
Ca < 0.015%,
Si < 0.12%
100 kg
CG-NI05-99 Boron Nitride Powder
Particle Size: 3 µm, 200 mesh or 325mesh
BN > 99 %,
B2O3 < 0.4%,
Ca < 0.01%,
Si < 0.10%
100 kg

Comparison of Boron Nitride Ceramics

Compositions BN>98% BN+SiC+ZrO2 BN+AIN
Binder B2O3 / AlBO3
Density 2.1-2.2 g/cm3 2.3-3.0 g/cm3 2.5-2.6 g/cm3
25°C Volume Resistivity >1013 Ω·cm >1012 Ω·cm >1014 Ω·cm
Max. Service Temp. (°C)
Inert Gas;
High Vacuum










Flexural Strength 75 Mpa 100 Mpa 130 Mpa
Compressive Strength 100 Mpa 300 Mpa 250 Mpa
Coefficient of Thermal Expansion
2.0 x 10–6/K 4.0 x 10–6/K 4.5 x 10–6/K
Thermal Conductivity 30 W/mK 40 W/mK 60 W/mK


Pyrolytic Boron Nitride Crucible Specification

Catalog No. PBN0922
Size 5ml~5L
Material PBN, Pyrolytic Boron Nitride
Standard LEC, MBE, VGF
Purity 99.99%


Product Available size
Liquid Encapsulated Czochralski, PBN LEC crucibles 50ml~5L
Molecular Beam Epitaxy, PBN MBE crucibles 5ml~300ml
Vertical Gradient Freeze, PBN VGF crucibles 0.2L~5L

Pyrolytic Boron Nitride Crucible Applications

Pyrolytic Boron Nitride Crucible from CG Material can withstand high temperature in high vacuum environment, plus, it has excellent thermal conductivity, corrosion resistance and electrical resistance. 

Available Pyrolytic Boron Nitride Crucible Products

The PBN crucible product code is composed as follows:

Abbreviations and code:

C conical-shaped crucibles
D double-wall crucibles
Ø lip

 PBN-1-12  PBN-1-14
Code: PBN 1
Capacity:1 cm³
Code: PBN 2
Capacity:1 cm³
 PBN-1-20  PBN-2-16
Code: PBN 3
Capacity: 1.5 cm³
Code: PBN 4
Capacity: 2cm³
 PBN-C2-22  PBN-5-16
Code: PBN 5
Capacity : 2 cm³
Code: PBN 6
Capacity : 5 cm³
 PBN-C5-27  PBN-C5-29
Code: PBN 7
Capacity : 5 cm³
Code: PBN 8
Capacity :5 cm³
 PBN-C8-27  PBN-10-22
Code: PBN 9
Capacity : 8 cm³
Code: PBN 10
Capacity: 10 cm³
 C12-36  C12-37
Code: PBN 11
Capacity: 12 cm³
Code: PBN 12
Capacity: 12 cm³
 C16-36  C25-33
Code: PBN 13
Capacity: 16 cm³
Code: PBN 14
Capacity: 25 cm³
 C25-51  C10-22
Code: PBN 15
Capacity: 25 cm³
Code: PBN 16
Capacity: 10 cm³
 35-34  C40-51
Code: PBN 17
Capacity : 35 cm³
Code: PBN 18
Capacity : 40 cm³
 C60-54  PBN60-37
Code: PBN 19
Capacity : 60 cm³
Code: PBN 20
Capacity : 60cm³
 PBN-C70-60  C75-77
Code: PBN 21
Capacity : 70 cm³
Code: PBN 22
Capacity : 75 cm³
 C80-54  C82-71
Code: PBN 23
Capacity : 80 cm³
Code: PBN 24
Capacity : 82 cm³
 85-41  125-54
Code: PBN 25
Capacity : 85 cm³
Code: PBN 26
Capacity : 125 cm³
 130-54  150-60
Code: PBN 27
Capacity : 130 cm³
Code: PBN 28
Capacity : 150 cm³


 155-60  160-60
Code: PBN 29
Capacity : 155 cm³
Code: PBN 30
Capacity : 160 cm³
 C200-84  200-58
Code: PBN 31
Capacity : 200 cm³
Code: PBN 32
Capacity : 200 cm³
 200-102  420-84
Code: PBN 33
Capacity : 200 cm³
Code: PBN 34
Capacity : 420 cm³


We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.



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