Introduction Alumina ceramic tubes
Alumina ceramic tube belongs to engineering ceramics. Our alumina ceramic tube range: 95% alumina tubes OBE/COE, 99% alumina tubes OBE/COE, 99.7 % alumina tubes OBE/COE, a wide variety of sizes, and custom lengths.
Alumina ceramic products include various tubes, rods, crucibles, boats, trays, dishes, and discs. Alumina Ceramic tubes have exceptional hardness and strength, resistance to chemical attack and wear, low dielectric loss and excellent electrical insulation.
Characteristics Alumina ceramic tubes
Alumina ceramic tube / Alumina furnace tube range:
- 95% alumina tubes OBE/COE
- 99% alumina tubes OBE/COE
- 99.7 % alumina tubes(C799 alumina ceramic tube) OBE/COE,
- a wide variety of sizesand custom lengths.
C799 alumina ceramic tube is with exceptional hardness and strength, resistance to chemical attack and wear, low dielectric loss and excellent electrical insulation. You will find our engineering ceramics are with good quality from these ceramic tubes.
Technical Data Sheet of Alumina ceramic tubes
| Item | Test condition | Unit | 96% alumina ceramics | 99% alumina ceramics | 99.5-99.7% alumina ceramics |
| Chemical ingredients | Al2O3 | Al2O3 | Al2O3 | ||
| Bulk Density | g/cm3 | >3.6 | 3.88 | 3.90 | |
| Max. Use Temp. | 1450℃ | 1600℃ | 1650℃ | ||
| Water absorption | % | 0 | 0 | 0 | |
| ROHS Hardness | ≥85 | ≥89 | ≥89 | ||
| Flexural strength | 20℃ | Mpa(psix10^3) | 358(52) | 550 | 550 |
| Compressive Strength | 20℃ | Mpa(psix10^3) | 2068(300) | 2600(377) | 2600(377) |
| Fracture Toughness | K(l c) | Mpa m^1/2 | – | – | – |
| Coefficient of thermal expansion | 25-1000℃ | 1X10^-6/℃ | 7.6 | 7.9 | 8.2 |
| Coefficient of thermal conductivity | 20℃ | W/m.K | 16 | 17-30.0 | 17-30.4 |
| Thermal Shock Resistance | ^Tc | ℃ | 250 | 200 | 200 |
| Dielectricity constant | 1MHz.25℃ | 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℃ | ohm-cm | >10^13 | >10^14 | >10^14 |
