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Alumina ceramic tube
Alumina ceramic tube

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Alumina ceramic tube
1.Material: 85 - 99.5% alumina ceramic
2.Purpose:used in various furnace
3.Max Length 2500mm

Alumina ceramic tube

 

We mainly produce alumina tubes, rods and various industrial ceramic parts, which are mainly used in thermalcouple temperature, liquid steel continous temperature, various industrial furnace(containing vacuum furnace, carburizing furnace, wire furnace, atmosphere furnace etc), especially widely used in petrochemical, spinning, electric, instrumentation, mechanical workout, military project etc industry.

 

 Main performance index    
Serial numberperformance indexMeasuring unitHigh purity aluminaAlumina

High

alumina

1Al2O3%99.799.385
2SiO2%less than0.1
3Densityg/cm33.953.883.2
4Wter absorption%00.010.2
5Cld compressive strengthMPa450350200
620 degree Celsius leak ratesTorr/L.secless than10-11less than10-11less than10-11
7Twisting in high temperaturemm

1700 degree

Celsius 0.2

allowance

1600 degree

Celsius 0.2

 allowance

1400 degree

Celsius 0.2

allowance

8Bonding in high temperature 

1700 degree

 Celsius

non-caked

1600 degree

Celsius

 

non-caked

1400 degree

Celsius

non-caked

920—1000 degree Celsius coefficient of

mm.10-6/degree

Celsius.m

8.68.28.2
thermal expansion
10Thermal conductivityW/m.k252525
11Electric insulation strengthKV/mm202015
1220 degree Celsius direct currentOhm/cm101410141014
insulating resistance
13High-temperature

1000 degree

Celsius MΩ

≥0.08≥0.08≥0.08
insulation resistance

1300 degree

Celsius MΩ

≥0.02≥0.02≥0.02
14Thermal shock resistance 

1550 degree

 Celsius 6

times not

racked

1550 degree

Celsius 6

 times not

cracked

1300 degree

Celsius 3

times not

cracked

15Maximum service temperaturedegree Celsius19001800 

 

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