High Purity 3700Mpa Alumina Screw Thread Seal 88HRA Ceramic Rings
High Purity Alumina Screw Thread Seal Ceramic Rings
Description:
Alumina ceramic is with superior strength, hardness, insulation, thermal conductivity, high temperature, oxidation resistance, corrosion resistance, abrasion resistance, high temperature strength and other characteristics. It has been widely used in engineering, mechanical seals, electronics, intrumentation, sensing, transport, communications,and other occasions or areas. The content of 99.7%, 99.5%, 99%, 96% alumina products contain the crucible, sockets, valves, electrodes, spools, wear board, alumina balls, rings, electronic porcelain, textile porcelain pieces and other shaped pieces.
Technical Parameters:
| Test item/Unit | Numerical Value | Test item/Unit | Numerical | ||||
| Product Material | Alumina | Zirconia | Product Material | Alumina | Zirconia | ||
| Component Content % | ≥99% | ≥95% | ≥90% | Volume Resistance MM | >1012 | >1012 | >1012 |
| Sintering Temp ℃ | 1780-1800 | 1650-1680 | 1550-2600 | Bending Strength Mpa | 400 | 320 | 1100 |
| Specific Gravity g/cm3 | ≥3.8 | ≥3.6 | >6 | Thermal Expansion Coefficient'10' | 6.8-8.0 | 6.2-8.5 | 6.9-10 |
| Breakdown Voltage Strength kv/mm |
15 | 15 | 15 | Roughness um | ≤0.8 | ≤0.8 | ≤0.8 |
| Bibulous Rate% | <0.01 | <0.01 | <0.01 | Mirror Polished Ra | ≤0.05 | ≤0.1 | ≤0.05 |
| Anti Pressure Mpa | 3700Mpa | 2400Mpa | 5000Mpa | Thermal Conductivity W/m.k | 25 | 20 | 25 |
| Hardness Hra | ≥88 | ≥82 | ≥88 | Temperature Resistance ℃ | 1700 | 1600 | 1800 |
Advantages:
1. Excellent insulation, security, long working life.
2. High temperature resistance.
3. Resistance to electric breakdown.
4. Stand wear and tear.
5. High strength.
6. Corrosion resistance.
Application:
1. Rotating bearing balls and rollers.
2. Cutting tools.
3. Jet Engine moving parts.
4. Jet Engine wear parts.
5. Turbine blades, vanes, buckets.
6. Metal tube forming rolls and dies.
7. Precision shafts.
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