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PBN0955 PBN Machined Products, Pyrolytic Boron Nitride

PBN Machined Product Properties

PBN machined 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 Machined 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 including trays, furnace components, heating elements, vaporizing pots, rods, bars, sheets, tubes and more. Our experienced experts are pleased to help to locate best solutions for your development process.

Compared with normal boron nitride ceramic, pyrolytic boron nitride (PBN) has raw materials with a 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.

   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 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 temperatures (2500`C). As the coated products have great performance in high vacuum and high-temperature circumstances, they are ideal for applications in the semiconductor industry.

PBN Machined 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 Machined 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 Machined 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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PBN Machined Products
Average rating:  
 1 reviews
by Steve Clutter on PBN Machined Products

Great stuff. Strong. Well crafted. Great looking and nice quality.