PBN Coated Graphite Products
Datasheet
· Size: <40cm (15")
· Material: PBN, Pyrolytic Boron Nitride
· Purity: 99.99% for PBN Coating
· Surface: Zero Porosity
· Coating thickness: 50~500μm
PBN Coated Graphite Product Description
As PBN and graphite are machinable materials, we could offer custom manufacturing services and deliver all kinds of products based on graphite with PBN coating. These include trays, furnace components, heating elements, vaporizing pots, rods, bars, sheets, tubes, and more. Our experienced expertise is pleased to help locate the best solutions for your developing process.
Compared with normal boron nitride ceramic, pyrolytic boron nitride (PBN) has raw materials with much higher purity levels. PBN sheets, discs, and other pytolytic boron nitride products are synthesized on the mold by the chemical vapor deposition (CVD) process, with BCl3 and NH3.
BCl3 + NH3 ----> BN +3HCl
Pyrolytic boron nitride advanced ceramics exhibits high resistance to electricity but good thermal conductivity. It is a high-purity material with no porosity which could be deposited on all kinds of graphite shapes by chemical vapor deposition (CVD). Although Pyrolytic boron nitride could be deposited on various materials, it is usually used on graphite only, since the temperature of this CVD process is extremely high and the atmosphere is corrosive. PBN-coated graphite materials significantly enhanced the performance of the surface. Better purity, lower porosity, and roughness. PBN material could also stand high temperatures (2500 ℃). As coated products have great performance in high vacuum and high-temperature circumstances, they are ideal for applications in the semiconductor industry.
PBN Coated Graphite Product Specification
|
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 |
|
PBN Coated Graphite Product Applications
Boron Nitride ceramic from Advanced Ceramic Materials can withstand high temperatures in high vacuum environments, 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
Packing Service
Supreme Ceramic Materials (SCM) supplies various PBN Coated Graphite Products and they are carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
