1.Hard wear surfaces
Resists abrasion in guides, liners and sliding components; finish and counterface remain important.
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Alumina
Alumina (Al₂O₃) combines hard wear surfaces, electrical insulation and chemical stability for industrial components and electronic substrates. Purity and microstructure distinguish general-purpose and higher-purity grades.
95%, 96%, 99%, 99.5% and 99.7%+ alumina ceramics
Core advantages
2.Electrical insulation
Supports insulating components and substrates. Performance depends on temperature, thickness and electrical loading.
3.Chemical stability
Useful in many process environments; confirm compatibility with the actual medium and concentration.
4.Heat-resistant oxide
A candidate for hot-zone supports and protection tubes, with grade-specific limits for load and thermal cycling.
5.Practical material choice
A broad range of purities lets designers balance wear, insulation, cleanliness and component cost.
Typical applications
Electrical insulators
Bushings, spacers and supports provide electrical separation in compact assemblies.
Electronic substrates
Insulating substrates provide mechanical support with moderate heat conduction.
Wear guides and liners
Hard contact surfaces address abrasion in handling and processing equipment.
Pump and valve parts
Sealing faces and flow components combine wear resistance with medium-specific chemical compatibility.
Furnace and sensor supports
Protection tubes and supports serve hot zones when purity, atmosphere and thermal cycling are qualified.
Material comparison
| Material / route | Density (g/cm³) | Bending strength (MPa) | Conductivity (W/(m·K)) | Material distinction |
|---|---|---|---|---|
| 96% alumina | 3.72 g/cm³ | 343 MPa (4-point, 20°C) | 24.7 W/(m·K), 20°C | General-purpose insulation and wear reference. |
| 99.5% alumina | 3.90 g/cm³ | 300 MPa (4-point, 20°C) | 30.0 W/(m·K), 20°C | Higher purity; not automatically higher flexural strength. |
| Sintered Y-TZP zirconia | 6.02 g/cm³ | 1240 MPa (4-point, 20°C) | 2.2 W/(m·K) | Higher strength and lower heat conduction; review hydrothermal ageing. |
| Magnesia-stabilized zirconia | 5.72 g/cm³ | 620 MPa (4-point, 20°C) | 2.2 W/(m·K) | A distinct stabilized zirconia grade, not an alumina substitute by default. |
Manufacturing processes and design options
Dry or isostatic pressing
Form blanks for sintering; geometry and production volume guide the route.
Ceramic injection molding
Consider near-net forming for repeatable complex shapes, with tooling and shrinkage allowances.
Extrusion or tape casting
Evaluate extrusion for consistent sections and tape casting for thin substrate formats.
Diamond grinding and lapping
Finish sintered contact surfaces and critical dimensions to drawing-defined requirements.
Process availability and acceptance criteria are confirmed for the selected component.
Request a Al2O3 component quote
Send the drawing, quantity, medium, temperature cycle, load and critical surfaces. Material route and process options are confirmed for the selected part.
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