An alumina ceramic cylinder liner is a precision-engineered tubular component made from high-purity aluminum oxide (Al₂O₃), designed to serve as the wear and sealing surface in high-pressure pumps, valves, and hydraulic or chemical systems. It replaces traditional metal liners in environments where abrasion, corrosion, or thermal stress rapidly degrade metallic components.
Alumina Ceramic Cylinder Liner Benefits
- High Wear Resistance: With a Vickers hardness of>14.5 GPa, the alumina liner can withstand prolonged friction in mechanical pumps and dosing systems.
- Excellent Dimensional Control: Achieved through precise extrusion and sintering, each unit meets strict tolerance requirements ±0.02mm or tighter.
- Chemical Durability: Inert to most acids, alkalis, and solvents, suitable for demanding chemical processing setups.
- Thermal Stability: Maintains structural integrity at working temperatures up to 1650°C, ideal for systems involving rapid heating/cooling cycles.
Alumina Ceramic Cylinder Liner Properties
| Property | Unit | 99.5% Al₂O₃ | 99.6% Al₂O₃ | 99.7% Al₂O₃ | 99.8% Al₂O₃ | 99.9% Al₂O₃ | 99.99% Al₂O₃ |
| Alumina content | % | 99.5 | 99.6 | 99.7 | 99.8 | 99.9 | 99.99 |
| Density | g/cm³ | 3.89 | 3.91 | 3.92 | 3.93 | 3.94 | 3.98 |
| Open porosity | % | 0 | – | – | – | – | – |
| Color | – | Ivory | Ivory | Ivory | Ivory | Ivory | Ivory |
| Water absorption | % | – | 0 | 0 | 0 | 0 | 0 |
| Young’s modulus (Elastic modulus) | GPa | 375 | 356 | 357 | 358 | 359 | 362 |
| Shear modulus | GPa | 152 | – | – | – | – | – |
| Bulk modulus | GPa | 228 | – | – | – | – | – |
| Poisson’s ratio | – | 0.22 | – | – | – | – | – |
| Compressive strength | MPa | 2600 | 2552 | 2554 | 2556 | 2558 | 2570 |
| Flexural strength | MPa | 379 | 312 | 313 | 314 | 315 | 320 |
| Fracture toughness | MPa·m¹ᐟ² | 4 | – | – | – | – | – |
| Hardness | GPa | 14.1 (≈1440 kg/mm²) | 23 | 24 | 25 | 26 | 30 |
| Thermal conductivity | W/m·K | 35 | 32–37 | 33–38 | 34–39 | 35–40 | 36–42 |
| Thermal shock resistance ΔT | °C | – | 222 | 223 | 224 | 225 | 228 |
| Maximum use temperature (no load) | °C | ≤1750 | 1755 | 1760 | 1765 | 1770 | 1800 |
| Coefficient of thermal expansion | 10⁻⁶/°C | 8.4 | – | – | – | – | – |
| Specific heat | J/kg·K | 880 | – | – | – | – | – |
| Volume resistivity | Ω·cm | >1×10¹⁴ | >1×10¹⁴ | >1×10¹⁴ | >1×10¹⁴ | >1×10¹⁴ | >1×10¹⁴ |
| Dielectric constant (relative permittivity) | – | 9.8 | 9.83 | 9.84 | 9.85 | 9.86 | 9.92 |
| Dielectric strength | kV/mm | 16.9 | 23.2 | 23.4 | 23.6 | 23.8 | 24 |
| Dissipation factor (loss factor @ 1 kHz) | – | 0.0002 | – | – | – | – | – |
Alumina Ceramic Cylinder Liner Specifications
| Item No. | Diameter (mm) | Thickness (mm) | Purity |
| AT-GT-01 | Customize | ||
Alumina Ceramic Cylinder Liner Packaging
- Unit pack: foam-lined sleeve or custom foam crate; bore protected with cap
