Boron nitride Washer
Boron nitride Washer can be long-term used at 1800 degrees under vacuum atmosphere. With gas protection, Boron Nitride can be used at 2100°. Boron Nitride is with high thermal shock resistance, no cracks under extreme cold & high temperature. If you take out Boron Nitride from 1000 degree furnace and colding it within short minutes. It still won’t break even repeat this test with 100 times.
Material Properties：
* High thermal conductivity
* Excellent thermal shock resistance
* Low thermal expansion
* Exceptional heat resistance
* Good Chemical Inertness
* High electrical resistance
* Low dielectric constant and loss tangent
* High volume resistivity
* Excellent machinability
* Excellent thermal shock resistance
* Low thermal expansion
* Exceptional heat resistance
* Good Chemical Inertness
* High electrical resistance
* Low dielectric constant and loss tangent
* High volume resistivity
* Excellent machinability
Grades 5 grades of boron nitrides are involved in Boron Nitride product series.
* BN99 ● CABN ● ALBN ● ZRBN ● ZABN ● SB
* BN99 ● CABN ● ALBN ● ZRBN ● ZABN ● SB
|
Boron Nitride Properties:
|
||
|
Thermal Conductivity
|
(40-50)W/m·k
|
|
|
Thermal expansivity
|
(6.5-7.5)*10-6 °C
|
|
|
Resistivity
|
>1012 Ω·m
|
|
|
Puncture voltage
|
(2.5-4.0)*106 /kv·m
|
|
|
Dielectric constant
|
3.8-4.3
|
|
|
Bending strength
|
>35mpa
|
|
|
Compression strength
|
>200mpa
|
|
|
Density
|
1.9—2.2 g/cm3
|
|
|
Working Temperature
|
Oxidizing Atmosphere
|
850°C
|
|
Vacuum and inertia
|
2000°C
|
|
Applications:
1. Electronic parts – heat sinks, substrates, coil forms, prototypes
2. Vacuum melting crucibles
3. CVD crucibles
4. Microcircuit packaging
5. Sputtering targets
6. High precision sealing, brazing, and metallizing fixtures
7. Microwave tubes
8. Horizontal caster break rings
9. Low friction seals
10. Plasma arc insulators
11. High temperature furnace fixtures and supports
2. Vacuum melting crucibles
3. CVD crucibles
4. Microcircuit packaging
5. Sputtering targets
6. High precision sealing, brazing, and metallizing fixtures
7. Microwave tubes
8. Horizontal caster break rings
9. Low friction seals
10. Plasma arc insulators
11. High temperature furnace fixtures and supports
