Shaanxi KeGu New Material Technology Co., Ltd
Shaanxi KeGu New Material Technology Co., Ltd
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Pressureless Sintered Silicon Carbide (SSiC) Mechanical Seal Rings are a breakthrough in advanced ceramic engineering, delivering superior performance in the most demanding conditions. Manufactured through a high-temperature, pressureless sintering process, these rings achieve a fully dense, pure silicon carbide structure with zero free silicon content. This ensures exceptional chemical purity, outstanding thermal resilience, and superior mechanical strength, making them the ideal choice for aggressive chemical, high-purity, and ultra-high-temperature applications.
Chemical Processing: Ideal for seals in pumps and valves handling concentrated acids, alkalis, and aggressive solvents.
High-Purity Industries: Perfect for semiconductor manufacturing equipment, where contamination from free silicon or metals must be eliminated.
Thermal & Heat Treatment: Suitable for furnace components, radiant tubes, and high-temperature fan seals.
Abrasive & Erosive Services: Excellent performance in abrasive slurry pumps and equipment handling particulate-laden fluids.
With exceptional hardness, unmatched chemical inertness, and reliable performance under extreme temperatures, SSiC mechanical seal rings ensure minimal maintenance, extended service life, and superior operational reliability—even in the most challenging environments.
Ultra-High Hardness: Exceptional resistance to abrasive wear and mechanical erosion.
Excellent Thermal Stability: Maintains structural integrity and strength at temperatures exceeding 1600 °C.
Outstanding Chemical Resistance: Highly inert to strong acids, alkalis, and oxidizers, ensuring long-term performance in corrosive environments.
Superior Thermal Shock Resistance: Withstands rapid temperature fluctuations without cracking or degradation.
High Purity & Full Density: The pressureless sintering process delivers a non-porous, binder-free microstructure with no free silicon, preventing contamination and enhancing corrosion resistance.
| Physical properties | Unit | SSiC | |
|---|---|---|---|
| Composition:SiC | Vol% | ≥98 | |
| Open Porosity | Vol% | ≈0 | |
| Density 20 ℃ | g/cm3 | ≥3.06 | |
| Hardness | Rockwell Hardness 45N | R45N | 93 |
| Vickers Hardness HV1 | kg/mm2 | 2350 | |
| Thermal Conductivity | 20°C | Wm-1K-1 | 196 |
| 1200°C | Wm-1K-1 | 60 | |
| Coficient of Thermal Expansion | 10-6K-1 | 4.0 | |
| Flexural Strength | 20°C | MPa | 320-400 |
| 1300°C | MPa | 300-400 | |
| Modulus of Elasticity @ RT | GPa | 410 | |
| Thermal shock resistance | ℃ | 1650 ＞350 | |
| Max. Service Temp (air) | ℃ | 1650 | |
Customizable dimensions available to meet specific application requirements.
Pressed α-SiC powder, combined with specialized additives, undergoes a high-temperature reaction to form a fully densified β-SiC structure through pressureless sintering.
Our sintered silicon carbide mechanical seal rings provide unmatched reliability in extreme operating conditions. The pressureless sintering process produces a fully densified ceramic material that excels beyond traditional sealing solutions in:
l Corrosive chemical handling
l High-temperature operations
l Abrasive and particle-laden fluid applications
l Critical sealing scenarios
