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
Alumina Ceramic Hollow Tube
Material：Alumina ceramics
Describe：Alumina Ceramic Hollow Tube, essential in high-tech and industrial sectors, offers excellent physical and chemical properties. Its high-purity alumina base and precision manufacturing ensure exceptional performance in extreme environments, from high temperatures to precise electrical insulation. Whether for structural support or electrical insulation, these tubes deliver reliable, durable performance.
Silicon Carbide Ceramic Split Rings
Material：Silicon Carbide Ceramics
Describe：Custom silicon carbide (SiC) ceramic split rings offer high mechanical strength and durability in industrial applications, with a split design for easy installation and removal.
Silicon Nitride Ceramic Nozzle
Material：Silicon Nitride Ceramics
Describe：Precision ceramic products like silicon nitride nozzles and abrasion-resistant tapered sleeves are crucial in industry. Known for their wear resistance, high temperature durability, and chemical stability, they are widely used in spraying, grinding, and metallurgy.
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.
Silicon nitride ceramic bearing rollers
Material：Silicon Nitride Ceramics
Describe：Discover silicon nitride (Si3N4) ceramic bearing rollers, known for their high strength and wear resistance. Widely used in aerospace, automotive, electronics, and industrial machinery, these rollers enhance bearing durability, reduce maintenance, and extend equipment lifespan.
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.