Description
High quality of alumina ceramic tubes made in factory price
1. Extreme high temperature stability under reducing, inert and high vacuum condition under high temperature up to 1800C.
2. Extreme wear and abrasion resistance.
3. Chemical corrosion resistance under high temperature.
4. High dielectric properties.
5. Gas tight for many applications to provide protective atmospheres or high vacuum at high temperature to eliminate contamination or impurity.
| Chemical competent | Al2O3 | ≥85% |
| SiO2 | <12% |
| Fe2O3 | <0.5% |
| Alkaline matter | <2.5% |
| Density | 2.6 g/cm3 |
| Hardness | 7 M |
| Water absorption | <0.2% |
| Rupture strength | >1300kg/cm2 |
| Gas tightness | Kept for ten minutes at negative pressure of 1.3Kpa. The pressure drop is less than 0.3Kpa. |
| Heat tolerance | Insert the pipe into the furnace at a depth of 20mm. Heat to 1600ºC and maintain for 30 minutes. |
| Alkali tolerance | In the Na2CO3 solution of 2N concentration, boil for 15 hours with the weight loss not greater than 20mg/dm2. |
| Volume resistance | >2*10(5) Ω@cm/1300ºC |
| Breakdown voltage | 18kv/cm |
| Expansion coefficient | 5*10(-8) |
| Temperature for use | Long-term: 1400ºC Short-term: 1600ºC |
| Chill and abrupt heat | 1300ºC~room temperature not cracking thrice. |
Complaint
