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.
Shipment Methods: Sea or Air transportation, train or express
Payment Methods:
1) L/C ; 2) T/T ; 3) Paypal ; 4) Money Gram ; 5) Western Union
About us
1. Our company is a high & new technology enterprise specially engaged in developing, manufacturing and selling alumina tubes and crucibles.
2. It established in the year 2005, with more than 17 years experience for production.
3. Products are exported to USA, Germany, France, Poland, Spain,Turkey, Russia, Ukraine, Japan, Korea, Singapore, Vietnam, Thailand and Iran, etc.. They are highly approved by our customers all over the world.
4. Our eternal faith is "seeking for living with the quality, getting reputation with honesty, seeking for development with mutual benefit".
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