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| 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 |
Compared with normal boron nitride ceramic, pyrolytic boron nitride (PBN) has a much better purity level. PBN tubes 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, as the purity of vapor is easier to be controlled. Most PBN products made from the CVD process have a total impurity of less than 100 ppm, which means the purity is better than 99.99%. With such a high purity level, PBN crucibles are ideal products for semiconductor industries.
Similar to graphite, boron nitride has great strength at high temperatures. 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 China Special Ceramic Parts, Inc. also have great thermal shock resistance. Plates of PBN could be heated to more than 2000 degrees and dropped into the water without getting broken.
|
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 |
|
|
thermo 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 |
|
Boron Nitride ceramic from China Special Ceramic Parts, Inc. can withstand high temperature in a 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
ACM’s PBN Tubes are carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
