Produced from high-purity silicon powder by direct nitridation under a mature, standardised process control. The powder is clean, with a uniform particle-size distribution and high sintering activity, and is suitable for producing G5 and G10 grade silicon nitride bearing balls as well as general silicon nitride ceramic parts.
Key features
- High hardness and high strength
- Excellent corrosion resistance
- Uniform particle size distribution, D50 ≤ 10 µm
- High α-phase content, ≥ 92 %
Applications
Silicon nitride ceramics and silicon nitride bearing balls.
Typical certificate of analysis — DHG-GRXF-01
| Test item | Specification | Test method | Measured | Standard |
|---|---|---|---|---|
| α-phase content (%) | ≥ 92 | XRD | 94.3 | JIS R1640 |
| Oxygen content O (%) | ≤ 1.5 | Infrared absorption | 1.32 | ASTM C1494 |
| Nitrogen content N (%) | ≥ 38.5 | Infrared absorption | 38.9 | ASTM C1494 |
| Particle size D50 (µm) | ≤ 10 | Laser diffraction | 9.7 | GB/T 19077.1 |
| Iron Fe (ppm) | ≤ 5 | ICP-AES | 374 | SG-GC-07.1-2009 |
| Aluminium Al (ppm) | ≤ 5 | ICP-AES | 231 | SG-GC-07.1-2009 |
| Calcium Ca (ppm) | ≤ 5 | ICP-AES | 306 | SG-GC-07.1-2009 |
Typical values — contact us for the latest certificate of analysis.