PBN0953 PBN/PG Composite Heating Elements

Catalog No. PBN0953
Size Diameter: 0.5"~4"
Material PBN, Pyrolytic Boron Nitride and PG Pyrolytic Grap
Purity 99.99%
Color Black and White

Stanford Advanced Materials provide our customers with pyrolytic graphite and pyrolytic boron nitride (PG/PBN) composite heating element and heater. PG/PBN composite heater is extremely pure and could work under high vacuum circumstances. Both PBN and PG has very high maximum working temperature, making the PBN/PG composite heating elements have great performance.

Pyrolytic Boron Nitride Description 

High purity and high-performance pyrolytic boron nitride are used as the substrate for the PBN heating element. Pyrolytic graphite(PG) is placed on the surface of PBN plates by the CVD method as conductor and heater. Depending on the different requirements of applications, the PG heating element could be covered by PBN again or just stay open. 

As both PG and PBN are extremely pure (99.99% or even higher) and very stable in a vacuum or inert atmosphere, the PBN-PG heating element could be very durable and keep the chamber clean. It could be heated to 1600C in a very short time without emission of any gas component. These heating elements are ideal products for the semiconductor industry and applications that require high temperature, high vacuum, and high purity.

Available Patterns of our PBN heaters

Pyrolytic Boron Nitride Specification

Diameter

0.5”~4”

Power

150~3000W

Max. Working Temp.

2400 `C

 

 

 

 

 

 

 

We also provide PBN crucibles, tubes, and plates!

 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 at high temperature and low pressure. the PBN products are extremely pure(99.99%), 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. With such a high purity level, PBN plates 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 Stanford Advanced Materials 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.

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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