Introduction of Alumina Ceramic Materials
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.
E-mail:sales01@hkceramic.com

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) |
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.
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 |
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 |
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 |
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 |
*For more details, please feel free to contact our company.

Porous alumina ceramic gasket
Material:Alumina ceramics
Describe:Custom porous alumina (Al2O3) ceramic gaskets, or laser-cut ceramic rings, feature precision-drilled holes and unique shapes for precise component positioning. Alumina ceramic's high hardness and strength maintain shape and performance in high-pressure, high-friction conditions, ensuring stable equipment operation and longevity.

CNC Zirconia Zirconium Oxide Ceramic Substrate
Material:Zirconia Ceramics
Describe:CNC Zirconia Zirconium Oxide Ceramic Substrate,also used in food filling as metering pump components. These precision-engineered units offer precise fluid control with high hardness and strength, ensuring stable performance and longevity under demanding conditions of pressure and flow.

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.

Aluminum Nitride Ceramic Tube
Material:Aluminum Nitride Ceramics
Describe:Aluminum nitride (AlN) ceramic tubes and sleeves offer high thermal conductivity and stability in demanding environments like electronics and aerospace, ensuring reliability in industrial applications.

Round alumina ceramic heating plate
Material:Alumina ceramics
Describe:This alumina ceramic heating plate, with its exceptional thermal stability and high temperature resistance, is essential for high-temperature industrial applications. Its spiral design enhances heat distribution, and strategically placed holes ensure uniform heating across the surface.

Zirconia Ceramic Metal Parts Threaded Rod
Material:Zirconia Ceramics
Describe:Zirconia Ceramic Metal Parts Threaded Rod ,also used in food filling as metering pump components. These precision-engineered units offer precise fluid control with high hardness and strength, ensuring stable performance and longevity under demanding conditions of pressure and flow.