Alumina Ceramic Parts (Al2O3)
High-performance structural ceramic for extreme strength,
thermal shock resistance, and demanding engineering applications.
What is Alumina Ceramic?
Alumina ceramic (Al₂O₃) is one of the most widely used advanced ceramics, available in purity levels such as 95%, 96%, 99%, and 99.5%.
It is known for its high hardness, excellent wear resistance, corrosion resistance, and superior electrical insulation. Alumina ceramics are widely used in electronics, mechanical systems, semiconductor equipment, chemical processing, and medical industries.
HQ Precision Ceramics manufactures high-precision alumina ceramic parts with tight tolerances, complex geometries, and superior surface finishes to meet demanding industrial applications.
Key Features of Alumina Ceramics
√ High hardness and excellent wear resistance
√ Strong electrical insulation performance
√ Good high-temperature resistance
√ Excellent corrosion and chemical resistance
√ High compressive strength and dimensional stability
√ Available in multiple purity grades for different applications
Technical Properties of Alumina Ceramic
Alumina ceramic offers high hardness, excellent wear resistance, strong electrical insulation, and good chemical resistance. Its stable mechanical and thermal properties make it suitable for precision components used in electronics, industrial machinery, chemical processing, and high-temperature applications.
| Property | Unit | Typical Value | Notes |
|---|---|---|---|
| Material Name | — | Alumina Ceramic | Aluminum Oxide Ceramic |
| Material Type | — | Oxide Ceramic | Technical ceramic |
| Chemical Formula | — | Al₂O₃ | Aluminum Oxide |
| Color | — | White / Ivory | Depends on purity |
| Purity Range | % | 90 – 99.9 | Common industrial grades |
| Porosity | % | 0 – 1 | Depends on grade |
| Machinability | — | Limited | Usually requires diamond machining |
| Property | Unit | Typical Value | Notes |
|---|---|---|---|
| Density | g/cm³ | 3.8 – 3.9 | 96% alumina |
| Water Absorption | % | 0 | Dense material |
| Thermal Diffusivity | m²/s | 9 ×10⁻⁶ | At 25 °C |
| Specific Heat | kJ/kg·K | 0.88 | At 25 °C |
| Porosity | % | <1 | Depends on processing |
| Property | Unit | Typical Value | Notes |
|---|---|---|---|
| Young’s Modulus | GPa | ~300 | Typical value |
| Shear Modulus | GPa | ~120 | Typical value |
| Poisson’s Ratio | — | 0.22 | Typical value |
| Vickers Hardness | HV | ~1500 | High hardness |
| Flexural Strength | MPa | 300 – 380 | Depends on grade |
| Compressive Strength | MPa | 2000 – 2500 | Typical value |
| Fracture Toughness | MPa·m½ | 3 – 5 | Typical value |
| Property | Unit | Typical Value | Notes |
|---|---|---|---|
| Maximum Continuous Operating Temperature | °C | 1600 | In air |
| Maximum Short-Term Temperature | °C | 1650 | Short exposure |
| Thermal Conductivity | W/m·K | 24 – 30 | Depends on purity |
| CTE (25–1000 °C) | ×10⁻⁶ /°C | 8.2 | Thermal expansion |
| Melting Point | °C | 2050 | Aluminum oxide |
| Property | Unit | Typical Value | Notes |
|---|---|---|---|
| Dielectric Constant (1 MHz) | — | 9 – 10 | At 25 °C |
| Loss Tangent | — | ~0.0002 | Typical value |
| Dielectric Strength | kV/mm | 8 – 15 | Typical value |
| Volume Resistivity | ohm·cm | ≥10¹⁴ | At 25 °C |
| Electrical Insulation | — | Excellent | High resistivity |
*All values shown are typical material properties and are provided for reference only. Actual values may vary depending on material grade, manufacturing process, and testing conditions.
Advantages of Alumina Ceramic
- High Hardness and Wear Resistance
Alumina ceramic has very high hardness, making it highly resistant to abrasion and mechanical wear. It is widely used in components that operate under harsh or high-friction conditions. - Excellent Electrical Insulation
Alumina (Al₂O₃) provides outstanding electrical insulation properties, making it ideal for electrical and electronic components. - High Temperature Resistance
Alumina ceramics can withstand high temperatures and maintain stable performance in demanding thermal environments. - Strong Chemical and Corrosion Resistance
Alumina ceramic is resistant to many acids, alkalis, and corrosive chemicals, making it suitable for chemical processing equipment. - High Mechanical Strength
With excellent compressive strength and structural stability, alumina ceramic components can perform reliably under mechanical stress. - Long Service Life
Due to its wear resistance, corrosion resistance, and thermal stability, alumina ceramic components typically have a long operational lifespan in industrial applications.
Application of Alumina Ceramic
Semiconductor Industry
Alumina ceramic components are widely used in semiconductor processing equipment due to their electrical insulation and thermal stability.
Electronics and Electrical Insulation
Alumina is commonly used for ceramic substrates, insulators, and circuit carriers.
Industrial Machinery
Wear-resistant alumina ceramic parts are used in pumps, valves, and mechanical systems.
Medical and Laboratory Equipment
High purity alumina ceramics are suitable for medical devices and laboratory instruments.
Common Alumina Ceramic Grades
| Grade | Description |
|---|---|
| 92% Alumina | General industrial use |
| 95% Alumina | Good mechanical strength and insulation |
| 96% Alumina | Widely used for electronic substrates |
| 99% Alumina | High purity for semiconductor applications |
| 99.5%+ Alumina | High precision and high temperature applications |
Why Choose HQ Precision Ceramic?
