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
Precision ceramic products
Hollow alumina ceramic bolt
Material：Alumina ceramics
Describe：Custom hollow alumina (Al2O3) ceramic bolts, also known as fixed pins or rods, feature precise threading and a smooth surface for secure connection. Alumina ceramic's high hardness and strength maintain shape and performance in high-pressure, high-friction conditions, ensuring stable equipment operation and longevity.
Custom-shaped alumina ceramic structural components
Material：Alumina ceramics
Describe：Custom-shaped alumina ceramic component designed for fastening, connecting, or supporting sensors and electronic components. Porous structure aids in heat dissipation and fluid passage, ideal for automated machinery, electronic devices, and precision instruments.
Ceramic Diverter Core
Material：Zirconia Ceramics
Describe：The Ceramic Diverter Core excels in high temperature and corrosion resistance, crucial for precise fluid control and dispensing in industrial applications.
Alumina ceramic protective sleeve
Material：Alumina ceramics
Describe：Precision ceramic custom products like alumina ceramic protective sleeves for soldering irons, electrically insulating heating ceramic tube sleeves, and high-temperature resistant ceramic wire connectors offer exceptional thermal stability, electrical insulation, high-temperature stability, and wear resistance. Used extensively in soldering irons, heating equipment, electronics, and more, these ceramics are crucial for applications needing high temperature resistance, electrical insulation, and wear resistance.
Custom Insulating Zirconia Ceramic Fixing Strips
Material：Zirconia Ceramics
Describe：These zirconia ceramic fixing strips feature high hardness and strength, enabling excellent performance in demanding physical environments. They find extensive applications in fields such as power electronics, high-temperature environments, mechanical manufacturing, medical equipment, and aerospace.
Silicon Nitride Ceramic Locating Block
Material：Silicon Nitride Ceramics
Describe：Explore precise silicon nitride ceramic locating blocks for secure positioning and guidance in industrial applications. Their high hardness and strength ensure stability and longevity under pressure and friction.