Alumina Ceramic Tube/Pipe
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Advantages of Alumina Ceramic Tube/Pipe
Alumina ceramic tubes can withstand extreme temperatures and are very suitable for use in high-temperature environments (with a maximum resistance of 1800 ℃), it has high tensile strength and elasticity (bending strength of 350 Mpa), excellent electrical insulation performance (20 KV/mm), and special resistance to various chemicals, acids, and alkalis. Alumina ceramic tubes have high wear resistance due to their high hardness (hardness of 9 Mohs).
Application of Alumina Ceramic Tube/Pipe
1. Alumina ceramic tubes are used in combination with high-temperature furnaces, tube furnaces, and vacuum furnaces.
2. Alumina ceramic tubes are used as insulation pipes for shuttle furnace ceramic boats.
3. Alumina ceramic tubes are used in thermocouple protection tubes.
4. Application of alumina ceramic tubes in high-voltage electrical insulators.
Size,Performance index
Insulation tube (extrusion) Specification Table
NO. | Property | Unit | Alumina |
1 | Al2O3 | % | >99.3 |
2 | SiO2 | % | — |
3 | Density | g/cm3 | 3.88 |
4 | Water absorption | % | 0.01 |
5 | Compressive strength | MPa | 2300 |
6 | 20℃ leakage rates | Torr・L/sec | >10-11=1.33322×10-12Pa・m3/sec |
7 | Twisting in high temperature | mm | 0.2 allowed in 1600℃ |
8 | Bonding in high temperature | not bonded in 1600℃ | |
9 | 20—1000℃ coefficient of thermal expansion | mm.10-6／℃.m | 8.2 |
10 | Thermal conductivity | W/m.k | 25 |
11 | Electric insulation strength | KV/mm | 20 |
12 | 20℃direct current insulation resistance | Ohm/cm | 1014 |
13 | High-temperature insulation resistance | 1000℃ MΩ | ≥0.08 |
1300℃ MΩ | ≥0.02 | ||
14 | Thermal shock resistance | 4 times not cracked in 1550℃ | |
15 | Maximum working temperature | ℃ | 1800 |
16 | Hardness | Mohs | 9 |
17 | Flexural strength | Mpa | 350 |
Composition table
| NAME | CONTENT(%) |
| Al2O3 | 99.3-99.5(99.7) |
| SiO2 | 0.3-0.5 |
| CaO+MgO | 0.2-0.3 |
| K2O+Na2O | 0.2-0.35 |
| Fe2O3 | <0.1 |
| OTHER | <0.05 |
Our factory
Slip casting moulding: Inject the prepared slurry into the gypsum mold and let it stand for a period of time to allow the gypsum mold to absorb moisture. The slurry forms a uniform body on the inner wall of the mold.
Isostatic pressing: During the isostatic pressing procedure, binders are blended with the ceramic powder. As a result of this process, the powder transforms into freely flowing granules that can effortlessly fill the molds.
Extrusion moulding: Suitable for long tube products, the powder is extruded into shape through an extruder.
Why Choose Us?
1. 25 years of professional production industrial ceramics factory.
2. High quality products with low price.
3. Alumina ceramic products with lowest tolerance.
4. Show time for production.
5. Has a group of experienced, professional and efficient R&D team.
6. Has a good reputation in China and abroad.
7. MOQ is not limited, small quantity is welcome.
8. Vigorous team and good after-sales service.
FAQ
A1. Alumina (Al2O3) is a widely used material for highly insulating films due to its very low electrical conductivity, even at high temperatures.
A2. In more cutting-edge industries, alumina tubes are widely used as components in hi-tech process equipment. Applications include: Parts for CVD, ion implants, photolithography, and semiconductor systems. A high voltage insulator in plasma cleaning systems for aluminum rolling and coating mills.
A3. Not combustible. In case of fire in the surroundings, use appropriate extinguishing media.
A4. Of all the metal oxides, alumina performs best in this role as an amphoteric ion exchanger. In comparison the more commonly used silica only allows for a cation exchange due to its low pH pzc. Alumina is stable. It overcomes the relatively low and high pH instability of silica.
Certificates
Feedback
1. If you have any questions or questions, please contact us and we will communicate with you as soon as possible.
2. For any other satisfaction, please also feedback to us to make our service better and better.
