Céramique JiFeng
High-Performance Alumina Ceramic Ring & Precision Seal Solutions
At JiFeng Ceramics, we don’t just manufacture ceramic components; we engineer the critical Alumina Ceramic Ring solutions that power the heart of your machinery. Whether you require a robust mechanical seal face for a slurry pump or an ultra-pure insulating washer for semiconductor wafer handling, our Alumina Ceramic Ring products are fabricated to exceed the rigorous demands of modern industry.
Based on our advanced Cold Isostatic Pressing (CIP) and precision CNC Diamond Grinding capabilities, we deliver an Alumina Ceramic Ring that offers superior dimensional stability, chemical inertness, and exceptional tribological performance compared to metal alternatives.
The JiFeng Alumina Ceramic Ring Advantage
Our product range covers everything from standard flat washers to complex geometries. When you choose a JiFeng Alumina Ceramic Ring, you benefit from:
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Custom Stepped & Grooved Designs: As seen in our portfolio, we specialize in manufacturing each Alumina Ceramic Ring with stepped shoulders (T-shape), internal grooves, and chamfered edges to fit unique housing assemblies perfectly.
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Mirror-Like Surface Finish: For sealing applications, surface topography is critical. We achieve flatness measured in Helium Light Bands and surface roughness values as fine as Ra 0.1µm (N3 Grade), ensuring hermetic sealing for gas and liquid systems.
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Material Purity Options: Choose from 95% Alumina for cost-effective wear protection or 99.5% – 99.8% High-Purity Alumina for applications requiring high dielectric strength (>15 kV/mm).
Technical Specifications
Material Data Sheet: Sintered Alumina (Al₂O₃)
| Propriété | Unité | JFA-95 (95% Al₂O₃) | JFA-99 (99% Al₂O₃) | JFA-995 (99.5% Al₂O₃) | Test Standard |
| Primary Application | – | Wear Parts / Electrical | Chemical / Seals | Semi-conducteur / Vacuum | – |
| Densité | g/cm³ | ≥ 3.65 | ≥ 3.85 | ≥ 3.90 | ASTM C373 |
| Water Absorption | % | 0.00 (Impervious) | 0.00 | 0.00 | ASTM C373 |
| Dureté Vickers (HT 0.5) | GPa | 12.5 | 16.5 | 18.0 | ASTM E384 |
| Résistance à la flexion (MOR) | MPa | 300 | 350 | 380 | ASTM F417 |
| Résistance à la compression | MPa | 2,100 | 2,500 | 2,600 | ASTM C773 |
| Max. Working Temperature | °C | 1,450 | 1,600 | 1,650 | – |
| Conductivité thermique (20°C) | W/m·K | 20 | 28 | 32 | ASTM C408 |
| Rigidité diélectrique | kV/mm | 10 | 15 | 17 | ASTM D116 |
Applications & Industry Solutions
1. Fluid Handling & Pumps (Mechanical Seals)
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Problem: In slurry pumps or petrochemical valves, sand and corrosive fluids destroy metal seals in days.
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Solution: JiFeng Alumina Ceramic Rings serve as the stationary seat in mechanical seals. Paired with a Carbon Graphite or Silicon Carbide rotary face, they form a tribological pair that withstands abrasive friction for thousands of hours.
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Benefit: Reduces pump downtime and maintenance costs by up to 60%.
2. Automotive Water Pumps
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Application: Our rings are widely used in automotive cooling systems. The material’s high thermal shock resistance and low friction coefficient ensure the water pump operates silently and reliably over the vehicle’s lifespan (150,000+ km).
3. Semi-conducteur & Vacuum Equipment
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Application: 99.5% Alumina rings act as insulating spacers et vacuum feedthroughs.
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Why Alumina? Unlike polymers, alumina does not outgas in high vacuum. Its high dielectric strength isolates high-voltage components effectively, ensuring process purity.
4. Textile & Wire Drawing
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Application: Eyelets and guide rings.
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Feature: Our “Diamond Polished” surface finish protects delicate fibers from snagging or breaking, even at high production speeds.
Ready to upgrade your components? Contact JiFeng Ceramics Today for a custom quote on your Alumina Ceramic Ring requirements.
