Description of corundum tube
Corundum tube is a high-performance ceramic product with excellent properties such as high hardness, high wear resistance, high corrosion resistance, etc. It is widely used in mechanical engineering, chemical industry, electronics, aviation and other fields.
Characteristics of corundum tube
| Subject | Unit | AL95 | AL99 |
|---|---|---|---|
| Al2O3 | - | 95% | 99.00% |
| Color | - | Ivory, white | Ivory |
| tightness | - | airtight | airtight |
| Density | g/cm3 | 3.72 | 3.8 |
| Hardness | Mohs hardness scale | 8.8 | 9 |
| Water absorption | - | ≤2 | ≤0.2 |
| Bending strength（20℃） | Mpa | 304 | 340 |
| Compressive strength（20℃） | Mpa | 1910 | 2210 |
| Coefficient of thermal expansion（25℃-800℃） | 10-6/℃ | 7.6 | 7.6 |
| Dielectric strength（5mm厚度） | AC-kv/mm | 10 | 10 |
| Dielectric loss 25℃@1MHz | - | 0.0004 | 0.0006 |
| Dielectric constant 25℃@ MHz | - | 9.2 | 9.5 |
| Volume resistivity（20℃）（300℃） | Ω-cm3 | ＞1014 2*1011 | ＞1014 4*1011 |
| Temperature of prolonged use | ℃ | 1400 | 1600 |
| Thermal conductivity（25℃） | W/m-k | 20 | 34 |
Note: This product can be customized according to customer's requirements.
Product Features
- High purity: Al2O3＞99%, good chemical corrosion resistance
- Good heat resistance, long-term use in 1600 ℃, short-term 1800 ℃
- Good resistance to rapid cold and heat, not easy to blow up
Corundum tube application
Corundum tubes are designed for use in high temperature electric resistance furnaces to support and secure heating elements.
Kerui Refractory is trustworthy
Kerui has a professional team of talented workers, perfect service system, clear production process, strict quality control system. Kerui products are sold domestically and exported to Russia, Italy, France, Spain, Turkey, Bahrain, Korea and other international markets, and have won the unanimous praise of users.
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