The high temperature alumina tubes in our factory mainly include: Thermocouple protection tubes, Through tubes ( ceramic tubes with both ends open),insulating ceramic tubes,mainly used in the industries of Chemical, Metallurgy, Mine, Glass, Military, Steel, Electronic, Machinery, Building Material, Magnetic Material and etc.
Process: Moulding by slip casting
Performance: Good air tightness
High temperature resistance
High corrosion resistance
| Index |
Unit |
85 % Al2O3 |
95 % Al2O3 |
99 % Al2O3 |
99.5 % Al2O3 |
| Density |
g/cm3 |
3.3 |
3.65 |
3.8 |
3.9 |
| Water Absorption |
% |
<0.1 |
<0.1 |
0 |
0 |
| Sintered Temperature |
℃ |
1620 |
1650 |
1800 |
1800 |
| Hardness |
Mohs |
7 |
9 |
9 |
9 |
| Bending Strength(20℃)) |
Mpa |
200 |
300 |
340 |
360 |
| Compressive Strength |
Kgf/cm2 |
10000 |
25000 |
30000 |
30000 |
| Long Time Working Temperature |
℃ |
1350 |
1400 |
1600 |
1650 |
| Max. Working Temperature |
℃ |
1450 |
1600 |
1800 |
1800 |
| Volume Resistivity |
20℃ |
Ω. cm3 |
>1013 |
>1013 |
>1013 |
>1013 |
| 100℃ |
1012-1013 |
1012-1013 |
1012-1013 |
1012-1013 |
| 300℃ |
>109 |
>1010 |
>1012 |
>1012 |
Alumina Ceramic Protection Tube Sizes:
| Length(mm) |
≤2500 |
| ODXID(mm） |
5X3 |
6X3.5 |
6.4X3.96 |
6.6X4.6 |
7.9X4.8 |
8X5.5 |
9.6X6.5 |
10X3.5 |
10X7.5 |
12X8 |
| ODXID(mm） |
14X10 |
15X11 |
16X12 |
17.5X13 |
18X14 |
19X14 |
20X10 |
22X15.5 |
25X19 |
30X22.5 |
| Alumina Content(%) |
95/99/99.5 |
Application: Temperature element protection
Thermocouple protection tube
Alumina Ceramic Through Tube Sizes:
| Length(mm) |
≤2500 |
| ODXID(mm） |
4X3 |
5X3.5 |
6X4 |
7X4.5 |
8X4 |
9X6.3 |
10X3.5 |
10X7 |
12X8 |
| ODXID(mm） |
14X4.5 |
15X11 |
18X14 |
25X19 |
30X24 |
60X50 |
72X62 |
90X80 |
100X90 |
| Alumina Content(%) |
85/95/99/99.5 |
Application: Industrial Electric Heater
Laboratory Electric Furnace
Heat Treating Furnace
Alumina Ceramic Insulating Tube Sizes:
| Name |
OD(mm) |
ID(mm) |
Length(mm) |
Insulating Tubes |
One pore |
2-120 |
1-110 |
10-2000 |
Two pores |
1-10 |
0.4-2 |
10-2000 |
Four pores |
2-10 |
0.5-2 |
10-2000 |
Application: Mainly for the insulation between thermocouple wires
Notes: Customized sizes can be available
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