Alumina insulation tube
Our company mainly supply alumina ceramic products, especially thermocouple protection tube, insulation tube, furnace tube type. Due to different use temperature, it is divided into 99.7 porcelain(corundum), 99 porcelain (corundum), 95% porcelain (corundum), 85 porcelain (high aluminumi), 75 porcelain (mullite), chemical porcelain (40 aluminum), the above material which is the more content of alumina, the higher temperature can reach, the highest aluminum content of vertical use temperature 1710 degrees Celsius, and minimum of aluminum content of 1100 degrees Celsius.
Size of alumina insulation tube:
| Shape |
Round with Single hole |
Round with double holes |
| OD |
1 |
1.5 |
2 |
3 |
4 |
5 |
6 |
8 |
1 |
1.6 |
2 |
3 |
| ID |
0.5 |
0.6 |
1 |
2 |
2 |
3 |
4 |
5 |
0.2 |
0.3 |
0.5 |
0.7 |
| Length |
10~1600 |
| Shape |
Round with double holes |
Round with four holes |
| OD |
4 |
5 |
6 |
8 |
12 |
1.6 |
2.5 |
3 |
4 |
6 |
8 |
10 |
12 |
| ID |
1 |
1.2 |
1.5 |
2 |
4 |
0.35 |
0.5 |
0.5 |
0.8 |
1.5 |
2 |
2 |
3.5 |
| Length |
10~1600 |
Main performance
| number |
performance |
unit |
High corundum |
corundum |
High aluminum |
| 1 |
Al2O3content |
% |
99.7 |
99.35 |
85 |
| 2 |
SiO2content |
% |
<0.1 |
- |
- |
| 3 |
density |
g/cm3 |
3.95 |
3.88 |
3.4 |
| 4 |
Water absorption |
% |
0 |
0.01 |
0.2 |
| 5 |
Pressure at normal temperature |
MPa |
450 |
350 |
200 |
| 6 |
20ºC leak rate |
Torr/L.sec |
<10-11 |
<10-11 |
<10-11 |
| 7 |
High temperature bending |
mm |
1700ºC allowed 0.2 |
1600ºC allowed 0.2 |
1400ºC allowed 0.2 |
| 8 |
High temperature adhesive |
|
1700ºC no adhesive |
1600ºC no adhesive |
1400ºC no adhesive |
| 9 |
20-1000ºC the coefficient of thermal expansion |
mm10-6/ºC.m |
8.6 |
8.2 |
8.2 |
| 10 |
Thermal conductivity |
W/m.R |
35 |
34 |
17 |
| 11 |
Electrical insulation strength |
KV/mm |
20 |
20 |
15 |
| 12 |
20ºC direct insulation resistance |
Ohm/cm |
1014 |
1014 |
1014 |
| 13 |
High temperature insulation resistance |
1000ºC MΩ |
≥0.08 |
≥0.08 |
≥0.08 |
| 1300ºC MΩ |
≥0.02 |
≥0.02 |
≥0.02 |
| 14 |
Thermal shock resistance |
|
1550ºC 6 times no crack |
1550ºC 6 times no crack |
1300ºC 3 times no crack |
| 15 |
Max working temperature |
ºC |
1800 |
1750 |
1350 |
| 16 |
Suggested working temperature |
ºC |
1650-1700 |
1600-1650 |
1290 |
| 17 |
Mohs hardness |
|
9 |
9 |
4.5 |
| 18 |
Refractoriness |
|
2040 |
2030 |
1850 |
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Application:
As thermocouple protection tube, it is widely used in high-grade measuring device, also it is used in solar industry, chemical industry and variouls heat treatment process and equipment, scientific analysis instruments.
Photos of our factory
Why choose SHIBO?
1) leading producer, more than 20 years producing experience
2) factory direct sales, low price in the market
3) the whole production line from powder to finished products, top and steady quality assured
4)fast delivery and best sale service
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