Silicon Nitride
Family Overview
Silicon Nitrides (Si3N4) have a unique grain structure which delivers both exceedingly high strength and toughness and exceptionally high thermal shock resistance — making it ideal for applications with high dynamic stresses, thermal rigor, and demanding reliability requirements. Silicon nitrides also have the capacity for high-tolerance, wear-resistant finishes. This unique combination of material properties provides advantages in severe-service applications such as turbines and high-end ball bearings.
- High toughness
- Thermal shock resistant
- Tight tolerances
Hot Pressed Silicon Nitride
By hot pressing silicon nitride, one can achieve nearly zero-porosity. This leads to the exceptional mechanical properties as well as corrosion resistance even in high-temperature applications.
Sintered Silicon Nitride
Sintered silicon nitride's unique grain structure provides excellent mechanical properties for durability in mechanically rigorous environments.
Ceramic Expertise
CoorsTek has broad capabilities for manufacturing Silicon Nitride including specialized manufacturing processes that produce extreme tolerances for optimal performance.
Brochure Downloads
Properties | Units | NBD-200 | SN-101C | SN-102 | SN-103 |
Flexural Strength, MOR (20 °C) | MPa | 900 | 1000 | 1000 | 1000 |
Fracture Toughness, KIc | MPa m1/2 | 5.5 | 6.5 | 6.0 | 6.0 |
Thermal Conductivity (20 °C) |
W/m K | 29 | 34 | 18 | 14 |
Coefficient of Thermal Expansion | 1x10-6/°C | 2.9 | 3.7 | 3.5 | 3.6 |
Maximum Use Temperature | °C | 1400 | 1400 | 1000 | 1000 |
Dielectric Strength (6.35mm) | ac-kV/mm | — | — | 8.6 | 12 |
Dielectric Loss (tan δ) | 1MHz, 25 °C | — | — | 0.0017 | < 0.0004 |
Volume Resistivity (25°C) | Ω-cm |
> 1014 |
> 1014 |
> 1014 |
> 1014 |