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Boron Nitride Ceramics
Hot Pressed Boron Nitride is an excellent electrical insulator and does not require humidity to act as a lubricant. BN has poor mechanical properties, however, it generally has very high temperature heat capacity, excellent thermal conductivity, outstanding dielectric strength and easy machinability. In reducing and inert atmospheres, BN can withstand temperatures in excess of 2,000°C. BN comes in a variety of different grades in solid and powder form, all with slightly differing properties.
Main Properties of Boron Nitride Ceramics
| ITEM | UNIT | BN |
| Type | - | Hot Pressed |
| Density | g/cm3 | 2.00 - 3.25 |
| Color | - | white / grey |
| Water Absorption | % | 0.0 - 1.0 |
| Young Modulus | Gpa | - |
| Vickers Hardness | Gpa | - |
| Compressive Strength | Mpa | 100 - 500 |
| Flexural Strength | Mpa | 50 - 220 |
| Thermal Conductivity | W/m.K | 20 - 50 |
| Thermal Shock Resistance | Δ(°C) | 25 - 100 |
| Max. Working Temp. | °C | 900 - 2100 |
| Volume Resistivity | Ω ·cm | 10^12 - 10^14 |
| Dielectric Constant | - | - |
| Dielectric Strength | kV/mm | - |
* Tests under room temperature environment;
* The above information is offered for comparison only. Exact
properties will vary depending on the manufacturing method.
Typical Applications of Boron Nitride Ceramics
- Refractory applications
- Continuous casting
- Deck plates
- Heat treatment fixtures
- High temperature lubricant
- High temperature valves
- Molds/mold release agent
- Motel metals and glass casting
- Nozzles for transfer or atomization
- Laser Nozzles
- Nuclear Shielding
- Induction heating coil supports
- High-voltage electrical insulators
- Vacuum furnace supports
- Crucibles and containers for molten metals
Types of Hot Pressed Boron Nitride
- ZBN (Zirconia composited Boron Nitride)
- HBN (High purity Boron Nitride, purity > 99%)
- ABN (Aluminium Nitride composited Boron Nitride)
- ZABN (ZrO2 & AlN composited Boron Nitride)
