information centre / Ceramic material / Introduction of Alumina Ceramic Materials
Introduction of Alumina Ceramic Materials
Introduction
Alumina, a precision ceramic material, offers high hardness, chemical stability, temperature resistance, and electrical insulation. It’s vital for wear-resistant components, chemical vessels, high-temperature elements, electronic insulators, and precision parts.
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Specifications｜Support customization
| Plate material mm (L, H, and W can be selected as needed, customization supported) | ||||||||||||
| L | 3 | 5 | 8 | 10 | 12 | 15 | 18 | 20 | 22 | 25 | 28 | More (Customizable) |
| W*H | 100*100 | 90*140 | 95*145 | 150*150 | 160*160 | 122*290 | 110*275 | More (Customizable) | ||||
| Rod material mm (W, Ø can be selected as needed, customization supported) | ||||||||||||
| Ø | 0.5 | 0.8 | 0.9 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | More (Customizable) |
| W | 60 | 100 | 120 | 200 | More (Customizable) | |||||||
Features
Alumina (Alumina, Al₂O₃) is a highly common and widely used ceramic material. It is renowned for its excellent comprehensive performance and high reliability, finding applications in many demanding industrial sectors.
1. Broad Applications and Balanced Mechanical Performance
Alumina is widely appreciated for its balanced mechanical properties, including high strength, hardness, and excellent wear resistance. These characteristics allow alumina to play a crucial role in various fields.
- High-Temperature Industrial Applications: Alumina is highly prevalent in the manufacturing of refractory materials for high-temperature industrial furnaces. Its high melting point and stability enable it to operate in extreme high-temperature environments without deformation or damage.
- Electronic Components: Alumina is also extensively used in the electronics industry, particularly in manufacturing substrates, insulators, and packaging materials. Its outstanding electrical insulation and thermal conductivity make it an ideal material for electronic components.
2. Stability in Chemical and Physical Properties
Alumina’s stability in chemical and physical properties makes it indispensable in precision industries.
- Thermal Properties: Alumina’s heat resistance and good thermal conductivity make it very useful in applications requiring rapid heat dissipation, such as in LED lighting and power electronics.
- Mechanical Properties: High strength and hardness ensure alumina’s durability under physical stress, which is particularly crucial in aerospace and automotive manufacturing.
- Other Properties: Alumina’s high electrical insulation and strong corrosion resistance make it suitable for chemical processing environments and electrical applications. Additionally, its high biocompatibility also makes it highly favored in medical devices and bio-implant materials.
Primary characteristics
| Type | Unit | Alumina | ||||
| Material | \ | 95% Al2O3 |
96% Al2O3 |
99% Al2O3 |
99.5% Al2O3 |
99.7% Al2O3 |
| Colour | \ | White | White | Ivory White | Ivory White | Ivory White |
| Density | g/cm3 | 3.7 | 3.7 | 3.85 | 3.9 | 3.9 |
Mechanical properties
| Type | Unit | Alumina | ||||
| Material | \ | 95% Al2O3 |
96% Al2O3 |
99% Al2O3 |
99.5% Al2O3 |
99.7% Al2O3 |
| Colour | \ | White | White | Ivory White | Ivory White | Ivory White |
| Flexural Strength(20℃) | Mpa | 300 | 300 | 330 | 360 | 380 |
| Compressive Strength(20℃) | Mpa | 2000 | 2000 | 2000 | 2350 | |
| Modulus of Elastic(young)(20℃) | Gpa | 270 | 275 | 370 | 370 | 380 |
| Tracture Toughness(20℃) | MPam½ | 3.5 | 3.5 | 4 | 4 | |
| Poi sion’s Ratio(20℃) | \ | 0.2 | 0.22 | 0.22 | ||
| Hardness HRA(20℃) | HRA | 90 | 90 | 90 | ||
| Vickers Hardness(HV1) | kg/mm2 | 1600 | 1600 | 1600 | 1650 | 1750 |
| Rockwell Hardness(45N) | R45N | 83.5 | 83.5 | 83.5 | ||
Thermal properties
| Type | Unit | Alumina | ||||
| Material | \ | 95% Al2O3 |
96% Al2O3 |
99% Al2O3 |
99.5% Al2O3 |
99.7% Al2O3 |
| Colour | \ | White | White | Ivory White | Ivory White | Ivory White |
| Thermal Expansion Coefficient | 10-6K-1 | 6.5 | 6.5 | 7.6 | 7.2 | 7.2 |
| Thermal Conductivity | W/mk | 20 | 25 | 27.5 | 32 | 32 |
| Thermal Shock Resistance | △T.℃ | 200 | 200 | 200 | 250 | |
| Specific Heat Capacity | J/g·k | 0.79 | 0.78 | 0.79 | ||
| Max working Temperature(In Oxidizing) | ℃ | 1600 | 1600 | 1650 | 1650 | |
Electrical properties
| Type | Unit | Alumina | ||||
| Material | \ | 95% Al2O3 |
96% Al2O3 |
99% Al2O3 |
99.5% Al2O3 |
99.7% Al2O3 |
| Colour | \ | White | White | Ivory White | Ivory White | Ivory White |
| Vol une Resistivity at 20℃ | Ωcm | 1014 | 1014 | 1014 | 1014 | 1014 |
| Dielectric Strength | KV/mm | 10 | 10 | 10 | 15 | 15 |
| Dielectric Constant | \ | 9 | 9 | 9.1 | 9.9 | 9.9 |
| Dielectric LossAngle at 20℃,1MHz20℃ | tanδ | 3*10-4 | 2*10-4 | 3*10-4 | 1*10-4 | 1*10-4 |
*Values are typical material properties, actual values may vary due to product configuration and manufacturing process.
*For more details, please feel free to contact our company.
*For more details, please feel free to contact our company.
Other
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Alumina Ceramic Ring Sleeve
Material：Alumina ceramics
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Material：Silicon Nitride Ceramics
Describe：Explore silicon nitride (Si3N4) ceramic pipe fittings with dual-flange design and multiple mounting holes, ensuring stability and safety in high-pressure and high-temperature settings. Ideal for extreme industrial conditions, known for heat resistance, wear resistance, and chemical corrosion resistance.
Custom zirconia ceramic shaft cores
Material：Zirconia Ceramics
Describe：Custom zirconia (ZrO2) ceramic shaft cores, also known as ceramic step shafts, locating pins, or plungers. Featuring a multi-step design for precise positioning and securing in machinery, ideal for applications requiring accurate motion control like precision instruments, medical devices, or high-precision electronics.