Pyrolytic Boron Nitride MBE Crucible | PBN crucible
Material: Pyrolytic Boron Nitride /PBN
Production process: CVD
Purity: >99.99%
Supplier: QSAM Catalog No.: PBN-Crb-MBE
Chemical content of QSAM PBN crucible
Pysical properties of QSAM PBN crucible
- Product Details
PBN Products QSAM supplies
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OtherPBN Crucibles (VGF / LEC / Conical ) |
Pyrolytic Boron Nitride (PBN) MBE crucible
PBN Crucible is produced by CVD process (chemical vapor deposition) to create its solid body and all the boron nitride crystals grow parallel to the surface of which the vapor is deposited on. Due to the nature of CVD process, thick wall products (>3mm) is usually not available. For PBN MBE crucibles, the typical thickness is 0.8~1.5mm.
PBN is also a good choice for extremely high purity boron nitride. As the purity of gas material (BCl3 + NH3 --> BN +HCl)is a lot higher than regular boron nitride powder, purity for PBN is quite high and 99.99% is the typical grade. With it's high purity, high mechanical strength, high performance with molten metal and salts, PBN is becoming an widely used material in high vacuum processes. Without showing melting point and high thermal conductivity, pyrolytic material are ideal to be used as vacuum furnace parts. The CVD process give this pyrolytic boron nitride almost perfect layered structure, which leads to anisotropic thermal conductivity, making it an ideal material to make crucibles for crystal growing. Molecular beam epitaxy (MBE) is a common process for gallium GaAs crystal production and PBN is the ideal material to make MBE crucibles.
The pyrolytic boron nitride crucibles QSAM could supply are custom produced from our CVD furnance with high purity material. Dimensions of PBN crucibles are limited within 12“Dia. x 12"H, by equipment size.
Difference of PBN and hBN crucible
PBN Crucible applications
Single crystal growth
High purity molten salt
Vacuum advanced materials
Manufacturing semiconductor materials
PBN Crucible specification
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Appearance |
White/light yellow |
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Boron Nitride Content |
99.99% |
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Crystalline |
hexagonal |
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Mechanical Properties |
Along crystal plane |
Perpendicular crystal plane |
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Flexural Strength MPa |
60 |
N.A. |
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Tensile Strength MPa |
120 |
N.A. |
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Young Modulus GPa |
N.A. |
N.A. |
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Density |
2.1 g/cm3 |
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Porosity |
<5% |
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Hardness ~Knoop |
11 kg/mm2 |
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Thermal Conductivity |
60 W/mK |
2 W/mK |
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Thermal Expansion RT |
3 10-6/K |
15.5 10-6/K |
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Dielectric Constant |
4.0 |
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Dielectric Strength |
79KV/mm |
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Electrical Resistance RT |
>1014 ohm cm |
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PBN Crucible Related Articles
A brief direction of MBE crucible-Ta or PBN?
Quick intro for Residual stress and strain in PBN crucible resulting from thermal anisotropy
Understanding the VGF Process and the Role of PBN Crucible
What is PBN ceramic (pryolytic boron nitride)
PBN Crucible'sPackaging
As a ceramic material, boron nitride is quite fragile in a lot of cases. The BN crucibles are usually hold in plastic bags by vacuum, and protect with heavy foam.
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