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PBN0956 PBN Coated Graphite Products

PBN Coated Graphite Product Properties

PBN Coated Graphite Products

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

 

 

PBN Coated Graphite Product Description

As PBN and graphite are machinable materials, we could offer custom manufacturing service and deliver all kinds of products based on graphite with PBN coating. These including trays, furnace components, heating elements, vaporizing pots, rods, bars, sheets, tubes and more. Our experienced experties are pleased to help locating best solutions for your developing process.

Compared with normal boron nitride ceramicpyrolytic 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 —-> BN +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.

PBN Coated Graphite Product Specification

PBN Material 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

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 temperature in 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

Packing Service

ACM’s PBN Coated Graphite Products are carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.

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