Brief
BN content：99.5%
Density:1.9-2.2g/cm3
Mohs' hardnees:2
Thermal Conductivity：45-50 W/m·k
Oxidizing Atmosphere working temperature:850℃
Vacuum working temperature:1800℃
Inertia working temperature:2300℃
Details
Boron Nitride ceramic are made by hot pressing hexagonal Boron Nitride powders. The color of BN products is milky, true density is 2.27g/cm, Mohs value is 2, they have a high melting point (sublimate point is 3000°C).
Boron nitride, also known as white graphite, has similar structure with graphite. It has good electrical insulation, thermal conductivity, excellent thermal shock resistance and chemical stability. It has good corrosion resistance to molten metals, slag and glass.
Boron nitride ceramic sleeve Features
1. Easily Machinable
2. High Volume Resistivity
3. Excellent Thermal Shock Resistance
4. Withstand Extreme High Temperature
5. Corrosion Resistant
Boron Nitride Ceramics are widely applied in automobile, electronic, electrical engineering, aerospace, medical science, scientific research, for extreme difficult environments such as electrical insulation, thermal insulation, high temperature resistance, chemical resistance, etc.
Parameter
| Item | Unit | Index | |
| Thermal Conductivity (RT) | W/m·k | 45 - 50 | |
| Thermal expansivity (25 - 700℃) | 10⁻⁶/℃ | 6.5 - 7.5 | |
| Resistivity (RT) | Ω·m | >10¹² | |
| Puncture voltage | 10⁶ kv/m | 2.5 - 4.0 | |
| Mohs' hardness | - | 2 | |
| Dielectric constant (Σ) | - | 3.8 - 4.3 | |
| Bending strength (RT) | mpa | >35 | |
| Compression strength (RT) | mpa | >200 | |
| Density | g/cm³ | 1.9 - 2.2 | |
| Chemical Composition | B + N | % | 99.5 |
| Oxygen Content | % | ＜0.4 | |
| Carbon Content | % | ＜0.02 | |
| Working Environment Temperature | Oxidizing Atmosphere | ℃ | 850 |
| Vacuum | ℃ | 1800 | |
| Inertia | ℃ | 2300 | |
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