Product Main

Specifications

Material: alumina ceramic(75%~99.5%AL2O3 ceramic).
Single or Multi-bore ceramic tube. Size as per customers' need.
Packaging Detail:
Export cartons or wooden cases
Delivery Detail:
depends on your quantity,usually within 30days after order 

Chemical competent
Al2O3
≥99.5%
SiO2
<0.2%
Fe2O3
<0.1%
Alkaline matter
<0.1%
Density
3.9 g/cm3
Hardness
9 M
Water absorption
<0.1%
Ruptures trength
>2000kg/cm2
Gas tightness
Kept for ten minutes at negative pressure of 1.3Kpa. 
The pressure drop is less than 0.3Kpa.
Thermal 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
>9*10(5) Ω·cm/1600ºC
Breakdown voltage
20kv/cm
Expansion coefficient
8*10(-8)
Temperature for use
Long-term: 1600ºC  Short-term: 1800ºC