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PBN machined products

Catalog No.CO0306
SizeThikness: 0.5mm~4mm
MaterialPBN, Pyrolytic Boron Nitride
Purity99.99%

Stanford Advanced Materials provide full range of CVD material, such as pyrolytic graphite, pyrolytic boron nitride, and silicon carbide coated graphite. As PBN and graphite are machinable materials, we could offer custom manufacturing service and deliver all kinds of products.

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As PBN and graphite are machinable materials, we could offer custom manufacturing service and deliver all kinds of products. These including crucibles, dishes, trays, boats, electrical insulators, coated graphite products, furnace components, heating elements, vaporizing pots, rods, bars, sheets, tubes and more.

 

 Compared with normal boron nitride ceramic, pyrolytic boron nitride (PBN) has raw materials with much higher purity level. PBN sheets, discs and other pytolytic boron nitride products are synthesized on the mold by chemical vapor deposition (CVD) process, with BCl3 and NH3.

BCl3 + NH3 àBN +3HCl

Pyrolytic boron nitride advanced ceramics exhibits high resistance to electric but good thermal conductivity. It is a high purity material with no porosity which could be deposit 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 temperature (2500`C). As the coated products have great performance in high vacuum and high temperature circumstance, they are ideal for applications in semiconductor industry.

Material Properties

Structure of pyrolytic boron nitride and graphite

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


 

Stanford Advanced Materials also provide pyrolytic graphite(PG) products. Click here or send an inquiry for more information.



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