PBN / PG Heaters
The PBN/PG ceramic heater combines three layers of ultra-high purity ceramics, PBN-PG-PBN to produce an advanced micro-ceramic heating element system. Both our PBN heater (Pyrolytic Boron Nitride) and PG heater (Pyrolytic Graphite) are manufactured by high temperature CVD. These high performance elements exhibit outstanding thermal properties in a ceramic heater, including high thermal conductivity and anisotropy.
Structure and Manufacturing Process:
The remarkable properties of PBN and PG have been combined by chemical vapor deposition as follows:
|Process||CVD (High Temperature) (Reduced pressure) BCl3+NH3?BN+3HCl||CVD (High Temperature) (Reduced pressure) CH4+ ?C+2H2|
(Total metal impurities)
|< 1 ppm||< 1 ppm|
|Maximum suggested use|
Tensile strength at high temperature ("a" direction):
|Thermal shock resistance||o||o|
|“a” direction 1000°C||3X107Ωcm||4X10-6Ωcm|
|“c” direction 1000°C||3X109Ωcm||2X10-3Ωcm|
PBN/PG Performance Advantages:
Custom PBN/PG Heater Design:
Required minimum information is as follows:
- Shape…Size, structure of electrode.
- Temperature and thermal gradients of application.
- Atmosphere of application.
- Power source.
(1) Heating data of Ø4” heater
(2) Thermal gradients of Ø10” heater