China Aluminium Oxide Ceramic Tube 99% Al2O3 for Furnace

Gongtao company mainly produce alumina tubes, rods and various industrial ceramic parts, which are mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial furnace(containig vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry.
Sillimatin 60 Type C 530, Alsint 99.7 Type C 799 and Pythagoras Type C 610, all complying with DIN VDE 0335.
The main applications are in the area of thermal processes. Protection tubes, insulators, radiant tubes, support tubes for electric heaters, beams, profiles, incineration aids and special fabrications.
The Impervious Materials are:
Alsint(Re-crystallised Alumina) is rated to 1700oC
Pythagoras(Aluminous Porcelain) is rated to 1400oC
The Porous Material is:
Sillimantin 60 and is rated at 1350oC
Sillimantin has better thermal shock resistance and is used mainly in furnace tubes, however can be used as an outer protection sheath if thermal shock is critical.
Our items are various and exported to many countries. Welcome to contact us!

DimensionOuter dia. mmInner dia.mmLength mmRemarkItem Thermocouple protection tube7-1201-11010-2000
If you need others,we can
customize for you.Insulated tubeSingle hole2-1201-11010-2000(inner core)Double holes1-100.4-210-2000
Four holes2-100.5-210-2000

Property of material:

Material85 Al2o390 Al2o395 Al2o399 Al2o3Al2o385%90%93%99.30%Fe2o3≤ 1.0≤ 0.5≤ 0.5≤ 0.3Desnsity: g / cm33.43.53.63.85Vickers Hardness≥ 8.6≥ 8.899Water Absorption:%≤ 0.2≤ 0.1≤ 0.085≤ 0.01Refractoriness:°C1580 °C1600 °C1650 °C1800°CFlexural Strength:Mpa180200240280
Wear Rate( at room temperature,
erosion, 100 grinding)%≤ 3≤ 2.5≤ 1≤ 0.5


FeatureApplicationMain usage1.Great mechanical strength
Electric appliance industry
Automotive industry
1.Heat treatment furnace
and toughened furnace2.High softening temperature3.Good resistance to thermal impact4.Small thermal expansion coefficient
Mechanical industry
Engineer industry
2.Inner liner tube and heating
tube in electric furnace5.Good chill and abrupt heat properties6. Resistance to acid and alkali corrosion