Alumina Ceramic, also known as Aluminium Oxide or Al2O3, it is the one of the most widely used technical ceramic materials. Alumina ceramic components can be manufactured in a range of purities to suit for different applications. Forming methods will vary with the different size, shape and using requirement of products. Alumina ceramics are mainly used for mechanical, electrical, high temperature applications.
Alumina Ceramics can be made into different shapes e.g. rods, tubes, rings, plates, discs and other complex shapes according to customers' requirements with high precision.
Product Feature
Good strength and stiffness
Good hardness and wear resistance
Good corrosion resistance
High thermal conductivity
High temperature resistance
Electrical insulation
Low dielectric constant
Data Sheet for Materials
| Purity | 95% Alumina | 96% Alumina | 99% Alumina | 99.5% Alumina | 99.7% Alumina |
| Color | White/Pink | White | Ivory | Ivory | Ivory |
| Density (g/cm3) | 3.65 | 3.72 | 3.88 | 3.90 | 3.92 |
| Water Absorption (%) | 0 | 0 | 0 | 0 | 0 |
| Moh's Hardness | 9 | 9 | 9 | 9 | 9 |
| Flexural Strength (Mpa) (25℃) | 352 | 358 | 364 | 379 | 375 |
| Compressive Strength (Mpa) (25℃) | 2000 | 2068 | 2500 | 2600 | 2500 |
| Thermal Conductivity (W/m.k) (25℃) | 18-25 | ≥24 | 27 | 30 | 30 |
| Thermal Expansion Coefficient (25-1000℃)(10-6mm/℃) | 8 | 8 | 8 | 8 | 8 |
| Therma Shock Resistance △T(℃) | 220 | 220 | 180-200 | 180-200 | 180-200 |
| Max. Working Temperature (℃) | 1500 | 1650 | 1700 | 1750 | 1750 |
| Dielectric Strength (kv/mm) | 16 | 17.2 | 20 | 22 | 22 |
| Electrical Resistivity (Ω.cm) (25℃) | 1014 | 1014 | 1014 | 1014 | 1014 |
| Dielectric Constant (@1MHz, 25℃) | 9 | 9 | 9.7 | 9.7 | 9.8 |
| Dielectric Loss (tan delta) (@1MHz, 25℃) | 0.0004 | 0.0002 | 0.0001 | 0.0001 | 0.0001 |
Application
The typical application of Alumina Ceramics include:
Seal Rings
Plungers or pistons for valves
Electronic substrates
High temperature thermocouple tubes
Textile eyelets or guides
Electrical insulators
Wear resistant nozzles
Ceramic parts for high temperature furnace
