High Thermal Conductivity Hexagonal Boron Nitride Ceramic Cylinder
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- Inquiry
High Thermal Conductivity Hexagonal Boron Nitride Ceramic Cylinder
Hexagonal Boron Nitride rod has a microstructure similar to that of Graphite. In both materials this structure, made up of layers of tiny platelets, is responsible for excellent machinability and low-friction properties. we called hexagonal boron nitride (HBN) or white graphite.
Boron nitride 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 | ||||
Grades 5 grades of boron nitrides are involved in Boron Nitride product series. * BN99 ● CABN ● ALBN ● ZRBN ● ZABN ● SB | ||||
Ability | ||||
Max size：500x500x200mm Best tolerance: +/-0.05mm Thickness: 0.5 to 200mm High purity and composited Boron Nitride are both available |
Material Properties:
ITEM | UNIT | BN-2000 | BN-2300 | BN-2800 | BN-3000 |
Main Content | – | BN>99% | BN+Al2O3 | BN+AlN | BN+ZrO2 |
Color | – | White | Light Grey | Dark Grey | Dark Grey |
Density | g/cm3 | 1.95-2.00 | 2.25-2.35 | 2.75-2.85 | 2.90-3.00 |
Flexural Strength | Mpa | 30 | 65 | 85 | 90 |
Compressive Strength | Mpa | 55 | 145 | 205 | 220 |
Electrical Resistivity | Ω·cm | >1014 | >1013 | >1013 | >1012 |
Max. Use Temp. (Air) | °C | 900 | 1,000 | 1,000 | 1,000 |
Max. Use Temp. (Vacuum) | °C | 1,900 | 1,750 | 1,800 | 1,750 |
Max. Use Temp. (Inert) | °C | 2,000 | 1,750 | 1,800 | 1,750 |
Thermal Conductivity | W/m.K | 35 | 30 | 85 | 30 |
CTE (25 – 1,000 °C) | 10-6/K | 1.5 | 2 | 2.8 | 3.5 |
High Thermal Conductivity Hexagonal Boron Nitride Ceramic Cylinder
Applications
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
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