Description
Compared with normal boron nitride ceramic, pyrolytic boron nitride (PBN) has raw materials with much higher purity level. PBN sheets, discs 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. the PBN products are extremely pure（99.99%）, as the purity of vapor is easier to be controlled. Most of PBN products made from CVD process have total impurity of less than 100 ppm. With such a high purity level, PBN plates are ideal products for semiconductor industries.
Similar with graphite, boron nitride has great strength at high temperature. High purity PBN products have even better mechanical properties. As the solid material is formed by the CVD process, the density of the products could almost reach the theoretical value. PBN products provided by Stanford Advanced Materials also have great thermal shock resistance. Plates of PBN could be heated to more than 2000 degree and dropped into the water without getting broken.
Properties
Item | value | Unit |
lattice constant | a:2.504×10-10 c:6.692×10-10 | μ m |
density | 2.0-2.19 | g/cm3 |
resistivity | 3.11×1011 | Ω·cm |
tensile strength（ab） | 153.86 | N/mm2 |
bend strength | c | 243.63 | N/mm2 |
ab | 197.76 | N/mm2 |
elastic modulus | | 235690 | N/mm2 |
thermal conductivity | | “a” direction “c” direction | |
(200℃) | 60 2.60 | W/m·k |
(900℃) | 43.70 2.80 | W/m·k |
dielectric strength（at room temperature） | 56 | KV/mm |
Please notice, as a CVD material, pyrolytic boron nitride sheets could not be very thick. The largest thickness available for our PBN sheet is 0.2". We also provide PBN crucibles, tubes, and heating elements!
Typical PBN Crucibles
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 |
Applications
Boron Nitride ceramic from Stanford Advanced Materials can withstand high temperature in the 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:
-Electric insulators in the vacuum system
-Boron Nitride components for PVD, MOCVD, MBE system.
-Nozzles for nonferrous metals metallurgy industry
-Spacers for glass melting
-Insulators for high-temperature furnace
Packing
Our boron nitride plates/discs are wrapped in foam and packaged in plywood cases to ensure safe storage and transportation.
Stanford Advanced Materials also provide pyrolytic graphite(PG) products. Click here or send an inquiry for more information.
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