Pyrolytic Boron Nitride Crucible (PBN Crucible)
Pyrolytic Boron Nitride crucibles and other pyrolytic boron nitride products are synthesized on the mold by chemical vapor deposition (CVD) process, with BCl3 and NH3 at high temperature and low pressure. PBN products are extremely pure, as the purity of gas material is easier to be controlled. Typically, PBN products have total impurity of <100 ppm, which means the purity is no less than 99.99%. With such a high purity level, PBN crucibles are ideal products for semiconductor industries.
With its high density and purity, PBN is becoming a widely used material in vacuum processes. 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. PBN is the major material to make crucibles for GaAs crystal production.
PBN Crucibles are produced by CVD process and all the boron nitride crystals grow parallel to the surface of which the vapor is deposited on. The density of the products could almost reach the theoretical value. Due to the nature of CVD process, most common wall thickness for PBN crucibles is 0.8~1.5mm. We provide custom PBN crucibles and VGF / LEC / Conical / MBE / OLED crucibles.
Pyrolytic Boron Nitride Specification
|Lattice constant||a:2.504×10-10||μ m|
|Tensile strength (ab)||153.86||N/mm2|
|thermo conductivity||“a” direction||“c” direction|
|Dielectric strength (at RT)||56||KV/mm|
PBN Crucible Applications
Pyrolytic Boron Nitride Crucible from Edgetech Industries Ceramics Division can withstand high temperature in high vacuum environment, it has excellent corrosion resistance and electrical resistance. Based on the above excellent properties, Boron Nitride Tube 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
As a ceramic material, boron nitride is quite fragile in a lot of cases. Our Pyrolytic Boron Nitride Crucible is carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used for PBN products, vacuum packing is also engaged for some of the parts.