1.Acid&alkaline resistance
2.super heat capacity
3.good heat conductivity
4.large specific area
5. Good insulating and stren
Our company professionally produces various alumina tubes,alumina rings,the main forming method is CIP.Sintering through high temperature kiln and grind the products to the size and tolerance according to customer’s demand.
The products have the performances of good hermetica,good hardness,big density,low-abrade,heat-resistant,high voltage resistant,acid/alkali corrode-resistant and etc. They can be widely used in the industries of steel,electric power,metallurgy,coal,chemical industry ,petroleum and etc.
95%/99%/99.7% Al2O3 Material Parameters:
Item | Test Condition | Unit&Symbol | 95%Alumina ceramics | 99%Alumina ceramics | 99.7%Alumina ceramics |
The main chemical ingredient |
|
| Al2O3 | Al2O3 | Al2O3 |
Bulk Density |
| g/cm3 | 3.6 | 3.89 | 3.96 |
Maximum Use Temperature |
|
| 1450°C | 1600°C | 1650°C |
Water absorption |
| % | 0 | 0 | 0 |
ROHS Hardness |
|
| ≥85 | ≥89 | ≥89 |
Flexural strength | 20° C | MPa (psi x 103) | 358 (52) | 550 | 550 |
Compressive Strength | 20° C | MPa (psi x 103) | 2068 (300) | 2600(377) | 2600(377) |
Fracture Toughness | K(I c) | Mpa m1/2 | 4-5 | 5.6 | 6 |
Coefficient of thermal expansion | 25-1000° C | 1X 10-6/°C | 7.6 | 7.9 | 8.2 |
Coefficient of thermal conductivity | 20° C | W/m °K | 16 | 30.0 | 30.4 |
Thermal Shock Resistance | Tc | °C | 250 | 200 | 200 |
Dielectricity constant | 1MHz.25°C |
| 9 | 9.7 | 9.7 |
Dielectric strength |
| ac-kV/mm (ac V/mil) | 8.3 (210) | 8.7 (220) | 8.7 (220) |
Volume Resistivity | 100°C | ohm-cm | > 1013 | > 1014 | > 1014 |
