Black OEM Si3N4 Silicon Nitride Ceramics for Custom Non-Standard Structural Parts
Advanced silicon nitride ceramic materials, specifically engineered for the aluminum industry, offer superior thermal and mechanical properties compared to conventional alternatives. Building on this innovation, products like the L-shaped high thermal conductivity submerged heating appliance are set to deliver revolutionary improvements in aluminum industrial equipment performance.
Custom structural components demanding exceptional thermal shock resistance represent a key growth area for silicon nitride ceramics. In high-temperature, highly corrosive, and high-wear applications, silicon nitride is increasingly replacing traditional materials such as cemented carbide, alumina, zirconia, and silicon carbide.
Silicon Nitride Ceramics: Property Comparison Data
| Category |
Property |
Unit |
99% Al₂O₃ |
S-SiC |
ZrO₂ |
Si₃N₄ |
| Physical |
Density |
g/cm³ |
3.9 |
3.1 |
6.0 |
3.2 |
| Water Absorption |
% |
0 |
0.1 |
0 |
0.1 |
| Physical |
Sintering Temperature |
°C |
1700 |
2200 |
1500 |
1800 |
| Mechanical |
Hardness (HV) |
HV |
1700 |
2200 |
1300 |
1400 |
| Flexural Strength |
kgf/mm² |
3500 |
4000 |
9000 |
7000 |
| Mechanical |
Compressive Strength |
kgf/mm² |
30000 |
20000 |
20000 |
23000 |
| Thermal |
Max Working Temperature |
°C |
1500 |
1600 |
1300 |
1400 |
| Thermal Expansion Coefficient (0-1000°C) |
/°C |
8.0 * 10⁻⁶ |
4.1 * 10⁻⁶ (0-500°C) |
9.5 * 10⁻⁶ |
2.0 * 10⁻⁶ (0-500°C) |
|
|
5.2 * 10⁻⁶ (500-1000°C) |
|
|
4.0 * 10⁻⁶ (500-1000°C) |
| Thermal Shock Resistance |
ΔT (°C) |
200 |
250 |
300 |
400-500 |
| Thermal Conductivity (25°C) |
W/m*K |
31 |
100 |
3 |
25 |
| Thermal |
Thermal Conductivity (300°C) |
W/m*K |
16 |
100 |
3 |
25 |
| Electrical |
Volume Resistivity (20°C) |
Ω*cm |
>10¹² |
10⁶-10⁸ |
>10¹⁰ |
>10¹¹ |
| Volume Resistivity (100°C) |
Ω*cm |
10¹²-10¹³ |
- |
- |
>10¹¹ |
| Volume Resistivity (300°C) |
Ω*cm |
>10¹² |
- |
- |
>10¹¹ |
| Dielectric Breakdown Strength |
kV/mm |
18 |
Semiconductor |
9 |
17.7 |
| Dielectric Constant (1 MHz) |
ε |
10 |
- |
29 |
7 |
| Dielectric Loss Tangent |
tan δ |
0.4 * 10⁻³ |
- |
- |
- |
Key Advantages of Silicon Nitride (Si₃N₄)
- Excellent Thermal Shock Resistance (ΔT 400-500°C)
- High Mechanical Strength & Toughness
- Good Thermal Conductivity with low thermal expansion
- Superior Wear & Corrosion Resistance
- High-Temperature Stability up to 1400°C
- Electrical Insulation Properties
Applications: Ideal for custom structural components in metallurgy, automotive, aerospace, energy, and industrial wear parts requiring reliability under extreme conditions.