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.
Quick Links
Contact Us
Live
E-mail:sales01@hkceramic.com
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 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.
Aluminum Nitride Ceramic Structural Components
Material：Aluminum Nitride Ceramics
Describe：Customized aluminum nitride (AlN) ceramic structural components offer precise shapes and robust connections for high thermal conductivity and reliability in industrial equipment and electronics.
Ultra-large Silicon Nitride Ceramic Sleeves
Material：Silicon Nitride Ceramics
Describe：Discover a silicon nitride ceramic sleeve with precise machining and a smooth outer surface, ensuring reliability in high-performance applications. Ideal for large-scale mechanical equipment like pumps or high-pressure systems, silicon nitride offers exceptional mechanical strength, high temperature resistance, thermal shock stability, and abrasion resistance.
96% alumina ceramic tube
Material：Alumina ceramics
Describe：96% alumina ceramic tube, known as insulating industrial ceramic or high-temperature resistant precision sapphire ceramic, excels as a high-performance product in various industries. Its exceptional physical, mechanical, and thermal properties make it ideal for demanding environments like high temperature, high pressure, and high wear scenarios.
Custom Alumina Ceramic Rods
Material：Alumina ceramics
Describe：Alumina ceramic rods for electric heating elements, ideal for high-temperature applications. They act as supports or insulators, distributing heat and preventing direct current contact, ensuring safety and efficiency in heating devices.
Sandblasting Machine Zirconia Ceramic Rotor
Material：Zirconia Ceramics
Describe：Custom zirconia ceramic rotor designed for sandblasting machines, featuring multiple through-holes and a central threaded hole for easy installation and secure attachment to the drive shaft. Zirconia's mechanical properties ensure durability under high loads and speeds, with minimal wear for extended service life.