PBN vs. BN vs. Alumina: Evaporation Crucible Guide
Choosing the right PBN crucible for vacuum evaporation is critical to preventing film contamination and material spitting. This guide compares the three most common ceramic materials to stabilize your deposition process.
1) Why PBN Crucible for Vacuum Evaporation is Preferred
PBN (Pyrolytic Boron Nitride) is the gold standard for high-purity films. Its zero-porosity surface prevents wall creeping (climbing) and outgassing, making it superior to standard BN and Alumina for sensitive metal systems.
2) Quick Comparison: PBN vs. BN vs. Alumina
| Feature | PBN | BN | Al₂O₃ |
|---|---|---|---|
| Purity | Ultra-High | High | Standard |
| Non-Wetting | Excellent | Good | Variable |
| Thermal Shock | High | Excellent | Moderate |
| Best Application | Precious Metals | R&D / General | Oxides |
3) Selection Guide by Metal Type
- Gold/Silver/Precious Metals: Use PBN to stop creeping and maximize yield.
- Nickel/Palladium: Use PBN or dense BN to minimize reaction and contamination.
- Oxides: Alumina (Al₂O₃) is often the most economical choice.
Crucible Technical Support
Not sure which PBN crucible for vacuum evaporation fits your E-beam or thermal setup? Contact our engineering team.
Technical Director: Zhang Gong
Tel / WeChat: +86-18602175437
Email: telice@teliceramic.com
Website: teliteceramic.com
