CG MATERIAL
PBN Machined Products, Pyrolytic Boron Nitride
PBN Machined Products, Pyrolytic Boron Nitride
Pyrolytic Boron Nitride (PBN) is a type of high-purity ceramic material with excellent thermal and electrical properties. PBN is made through a chemical vapor deposition (CVD) process where boron and nitrogen gases are heated to high temperatures and deposited onto a substrate, creating a thin layer of PBN. This layer can then be removed and machined into various shapes and sizes.
PBN is commonly used in high-temperature applications where traditional ceramics would not be able to withstand the extreme heat. Its high thermal conductivity and low thermal expansion make it an excellent material for use in vacuum furnace insulation, semiconductor manufacturing, and other high-temperature processes.
PBN can be machined into various shapes, including crucibles, sheets, tubes, and custom parts. Its properties make it an ideal material for creating heaters, coatings, and other high-temperature components. PBN heaters can be designed to heat up to 2000°C and provide uniform heating, making them useful in semiconductor manufacturing and other high-temperature processes.
PBN is also used as a coating for graphite components, protecting them from oxidation and wear in high-temperature applications. The PBN coating provides a non-reactive surface, reducing contamination and prolonging the lifespan of the graphite component.
Comparison of Boron Nitride Ceramics
| Grade | BN-BO | BN-SZ | BN-AlN |
| 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) Oxygen; Inert Gas; High Vacuum |
900 2000 1800 |
900 1700 1700 |
900 2100 1900 |
| Flexural Strength | 75 Mpa | 100 Mpa | 130 Mpa |
| Compressive Strength | 100 Mpa | 300 Mpa | 250 Mpa |
| Coefficient of Thermal Expansion 25-1000°C |
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 |
PBN Machined Product Properties
| Compound Formula | BN |
| Molecular Weight | 24.82 |
| Appearance | White |
| Melting Point | 2973 °C |
| Density | 2.1 g/cm3 (h-BN); 3.45 g/cm3 (c-BN) |
| Solubility in H2O | Insoluble |
| Refractive Index | 1.8 (h-BN); 2.1 (c-BN) |
| Electrical Resistivity | 13 to 15 10x Ω-m |
PBN Machined Product Applications
Boron Nitride ceramic from CG Material can withstand high temperature in high vacuum environment, plus it has excellent corrosion resistance and electrical resistance. Thus, Boron Nitride ceramic product is an ideal choice in a wide range of industries, such as:
– Crucibles for crystal growth
– Break rings for horizontal casting machine
– Insulators for high temperature furnace
– Electric insulators in vacuum system
– Feed through for high voltage equipment
Packaging
We handle our products with care to ensure they remain in their original condition during storage and transportation and to preserve their quality.
