Porous ceramic tube
1.Material: alumina ceramic
2.Specification can be customed
3.High quality
Porous ceramic tube
1.Material:AL2O3 85%-99.5%
2.inside diameter = 0.3-2mm ,Outside diameter=1.0-8mm ,lenght=100-2200mm
3.Maximum temperature 1800 degree ,working temperature 1650 degree
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 |
Dimension | Outer dia. mm | Inner dia.mm | Length mm | Remark | |
Item | |||||
Thermocouple protection tube | 7-120 | 1-110 | 10-2000 | If you need others,we can customize for you. | |
Insulated tube | Single hole | 2-120 | 1-110 | 10-2000 | |
(inner core) | Double holes | 1-10 | 0.4-2 | 10-2000 | |
Four holes | 2-10 | 0.5-2 | 10-2000 |
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Feature | Application | Main usage |
1.Great mechanical strength | Electric appliance industry Automotive industry | 1.Heat treatment furnace and toughened furnace |
2.High softening temperature | ||
3.Good resistance to thermal impact | ||
4.Small thermal expansion coefficient | Mechanical industry Engineer industry | 2.Inner liner tube and heating tube in electric furnace |
5.Good chill and abrupt heat properties | ||
6. Resistance to acid and alkali corrosion |