Machinable & Ultra-Pure Boron Nitride (BN) Ceramics
Known as “White Graphite.” Offering the ultimate combination of effortless machinability, extreme thermal shock resistance, and zero wettability to molten metals. From rapid-prototyped Hot-Pressed BN insulators to 99.99% pure Pyrolytic BN (PBN) crucibles for semiconductor MBE and OLED evaporation.
Two Distinct Manufacturing Routes for Your Exact
Hexagonal Boron Nitride (h-BN) is highly anisotropic. To harness its full potential, we supply two distinct grades tailored to either mechanical machinability or ultra-high-vacuum purity.
Hot-Pressed BN (HPBN - 99% Purity)
The Machinable Workhorse. Produced by sintering BN powder under extreme pressure and heat. It is soft enough (Mohs 1.5-2.0) to be machined into highly intricate geometries using standard metalworking tools without the need for expensive diamond grinding. Ideal for high-temperature insulators and molten metal nozzles.
Pyrolytic BN (PBN - >99.99% Purity)
The Ultra-Pure Standard. Synthesized via Chemical Vapor Deposition (CVD) at high temperatures. It is completely free of binders and porosity, offering zero outgassing in ultra-high vacuum environments. It exhibits extreme thermal anisotropy, making it the premier choice for OLED evaporation crucibles and Molecular Beam Epitaxy (MBE) components.
Properties of Boron Nitride
| Property (Unit) | Testing Standard | Pure HPBN (Hot Pressed, 99%) | Pyrolytic BN (PBN, CVD, >99.99%) |
|---|---|---|---|
| Density (g/cm³) | DIN EN 623-2 | 1.90 - 2.00 | 2.15 - 2.19 (Near Theoretical) |
| Purity (%) | / | ≥ 99.0 | ≥ 99.99 (Extremely High) |
| Mohs Hardness | / | 1.5 - 2.0 (Machinable) | 1.0 - 2.0 (Machinable) |
| Flexural Strength (MPa) | DIN EN 843-1 | 50 - 160 | 150 - 200 (Parallel to ab-plane) |
| Compressive Strength (MPa) | DIN EN 843-1 | 100 - 150 | 200 - 250 (Parallel to ab-plane) |
| Thermal Conductivity (Parallel) (W/(m·K)) | DIN EN 821-2 | 60 - 70 | 60 - 80 (High) |
| Thermal Conductivity (Perpendicular) (W/(m·K)) | DIN EN 821-2 | 30 - 40 | 2.0 - 3.0 (Acts as Insulator) |
| CTE (Parallel) (10⁻⁶/K, 20-1000 °C) | DIN EN 821-1 | -1.0 to 1.0 (Near Zero) | 2.0 - 3.0 |
| CTE (Perpendicular) (10⁻⁶/K) | DIN EN 821-1 | 30.0 - 40.0 | 20.0 - 25.0 |
| Max. Operating Temp. (In Air) (°C) | / | 900 °C | 1000 °C |
| Max. Operating Temp. (Inert/Vacuum) (°C) | / | 1850 °C | 2300 °C |
| Dielectric Strength (kV/mm) | DIN EN 60672-2 | 25 - 30 | > 50 (Outstanding) |
| Volume Resistivity (Ω·cm, 20 °C) | / | > 10¹⁴ | > 10¹⁴ |
| Wettability to Molten Metals | / | Non-wetting | Absolutely Non-wetting |
| Outgassing at High Temp | / | Low | Zero (Ideal for Ultra-High Vacuum) |
Where Extreme Heat Meets Absolute Purity
The Challenge: Crystal growth and OLED material evaporation require crucibles that can withstand 2000°C+ without releasing any metallic impurities or gases into the ultra-high vacuum chamber.
Solution: PBN (Pyrolytic Boron Nitride) Crucibles. With 99.99% purity and zero outgassing, they ensure absolute contamination-free environments for Molecular Beam Epitaxy (MBE) and Vertical Gradient Freeze (VGF) crystal synthesis.
The Challenge: Structural insulators and supports inside vacuum induction furnaces must survive extreme heat, resist thermal shock, and provide high electrical resistance without degrading.
Solution: Machined HPBN Insulating Sleeves, Tubes, and Spacers. Easily customizable into complex shapes, providing a robust dielectric barrier that survives up to 2000°C in inert atmospheres.
The Challenge: Producing amorphous metal powders requires atomizing nozzles that can handle aggressive molten metals without wetting, clogging, or eroding.
Solution: HPBN Break Rings & Atomization Nozzles. Boron Nitride is fundamentally non-wetting to molten aluminum, magnesium, and copper. It prevents slag build-up and ensures smooth, continuous metal flow.
Rapid Prototyping Without Tooling Costs
Because HPBN can be machined using standard turning, milling, and drilling equipment, you completely bypass the costly and time-consuming diamond grinding processes required by Alumina or Silicon Nitride.
🔹Zero Tooling Fees: No expensive molds or specialized diamond bits required.
⚡Lightning-Fast Turnaround: Go from a 3D CAD model to a physical testing prototype in a matter of days, not weeks.
Complex Geometries: Easily achieve fine internal threads, micro-holes, and deep undercuts that are virtually impossible with other technical ceramics.
Precision BN Components Delivered to Spec
Dimensional Verification: Strict adherence to your geometric dimensioning and tolerancing (GD&T) standards using calibrated CMM and micrometers.
Low MOQ to High Volume: From single-piece research prototypes to recurring production runs.