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Alumina Tube
Alumina tubes (Al2O3 tubes, Aluminum oxide ceramic tubes) are used for industrial furnaces and thermal couple protectors.
Alumina ceramic is the most common technical material and relatively traditional ceramic. High-purity alumina has excellent performance in electrical insulation, high chemical resistance, and low thermal expansion. They are used to make parts for CVD, ion implants, photolithography, and semiconductors. The OD of the Al2O3 tube we can provide is 1mm~100mm.
Specifications of Typical Alumina Ceramics
| Item | Unit | Al2O3 |
| Physical Property | ||
| Color | Ivory | |
| Density | g/cm3 | 3.7-3.9 |
| Purity | % | 95~99.8 |
| Gas Permeability | 0 | |
| Water Absorption | 0% | |
| Mechanical Properties | ||
| Vickers Hardness | GPa | 12.3-17.2 |
| Flexural Strength | MPa | 300-380 |
| Compressive Strength (HV0.5) | MPa | 2000-2350 |
| Elastic modulus | GPa | 270-380 |
| Fracture Toughness | MPam1/2 | 3.5-4 |
| Thermal Properties | ||
| The Max Working Temperature | ℃ | 1650 |
| Thermal Conductivity at room temperature | W/(m·K) | 20-32 |
| Coefficient of Thermal Expansion | 10-6/℃ | 6.5-7.2 |
| Thermal Shock Resistance | △T℃ | 200 |
| Electrical Properties | ||
| Dielectric Strength | KV/mm | 10-15 |
| Dielectric Constant | 9-10 | |
| Dielectric Loss Angle(1MHz) | 0.0002-0.0003 | |
| Volume Resistivity | Ω·cm | >1014 |
The above chart just demonstrates the typical properties of common alumina ceramic we use to produce our alumina parts. Please notice that the properties of customized alumina parts vary due to different processing. Edgetech Industries, Advanced Ceramics Division provides alumina products according to your specified instructions or does its best to meet requirements.
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Boron Nitride Tube -
BN Tubes
Alumina Tube Application
-Spare parts for pan-semiconductor equipment (manufacturing equipment such as LCD and LED)
-Insulation
-Wear parts
-General machinery, hydraulic components
-Used as injector tubes, gas nozzles, and insulators.
-High-temperature situations & a protector for high-temperature thermal couples.
Packing of alumina tubes
As a ceramic material, the Alumina Tube is quite fragile in a lot of cases. Our Alumina Tubes are carefully handled to minimize damage during storage and transportation. Suitable outer boxes and inner cushioning materials are used, and vacuum packing is also engaged for some of the parts.