Pyrolytic Boron Nitride Crucible | PBN crucible

Introduction of PBN crucibles

PBN Crucibles are created by CVD process, whereby all boron nitride crystals grow parallel to the surface on which vapor is deposited. Thick-walled crucibles (>2mm) are typically unavailable due to the nature of the CVD process, resulting in most common PBN crucibles being 0.8~1.5mm thick. PBN is an excellent choice for extremely high purity boron nitride due to the high purity of gas material used during production. Typical PBN material has a purity of 99.99%. With its high density and purity, PBN is becoming widely used in vacuum processes. The CVD process imparts these PBN crucibles with a nearly perfect layered structure, resulting in anisotropic thermal conductivity ideal for crystal growth. PBN is the primary material for producing crucibles in GaAs crystal production.

 It is also a good choice for extremely high purity boron nitride. As the purity of gas material is a lot higher than regular boron nitride powder, purity for PBN material is quite high and 99.99% is the typical grade.  With it's high density, and high purity, PBN is becoming an widely used material in vacuum processes. The CVD process give these PBN crucibles almost perfect layered structure, which leads to anisotropic thermal conductivity, making it an ideal choice for crystal growing.PBN is the major material to make crucibles for GaAs crystal production.

Our PBN crucibles

 

The pyrolytic boron nitride (PBN) crucibles QSAM provided are custom produced from our CVD furnace with high purity material. Dimensions of PBN crucibles are limited within 12“Dia. x 12"H, limited by equipment size. As the production of PBN crucibles is a strict batch process, the unit price could be changed a lot based on quantity, as the fixed cost for each batch is quite high.

Regular PBN Crucibles

Product Name	Volume
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

*Here is a list of our standard PBN crucibles.

PBN Crucible applications

Single crystal growth

High purity molten salt

Vacuum advanced materials

Manufacturing semiconductor materials

PBN Crucible specification

Appearance	White/light yellow
Boron Nitride Content	99.99%
Crystalline	hexagonal
Mechanical Properties	Along crystal plane	Perpendicular crystal plane
Flexural Strength MPa	60	N.A.
Tensile Strength MPa	120	N.A.
Young Modulus GPa	N.A.	N.A.
Density	2.1 g/cm3
Porosity	<5%
Hardness ~Knoop	11 kg/mm2
Thermal Conductivity	60W/mK	2W/mK
Thermal Expansion RT	3 10-6/K	15.5 10-6/K
Dielectric Constant	4.0
Dielectric Strength	79KV/mm
Electrical Resistance RT	>1014ohm cm

PBN Crucible Packaging

As a ceramic material, PBN boron nitride crucibles are quite fragile in a lot of cases. Our PBN crucibles are usually hold in plastic bags by vacuum, and protect with heavy foam.

Related Product

Aluminum Nitride (AlN) tubes

Aluminum Nitride (AlN) Rods

Aluminum Nitride (AlN) Machining Parts