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| Application: | Refractory, Furnace Tube |
|---|---|
| Purity: | 99.7 |
| Type: | Ceramic Tube, Ceramic Tubes |
Suppliers with verified business licenses
Audited by an independent third-party inspection agency
| NAME | CONTENT(%) |
| Al2O3 | 99.3-99.5(99.7) |
| SiO2 | 0.3-0.5 |
| CaO+MgO | 0.2-0.3 |
| K2O+Na2O | 0.2-0.35 |
| Fe2O3 | <0.1 |
| OTHER | <0.05 |
|
NO. |
Property |
Unit |
Alumina |
|
1 |
Al2O3 |
% |
>99.3 |
|
2 |
SiO2 |
% |
- |
|
3 |
Density |
g/cm3 |
3.88 |
|
4 |
Water absorption |
% |
0.01 |
|
5 |
Cold compressive strength |
MPa |
350 |
|
6 |
20ºC leakage rates |
Torr/L.sec |
<10-11 |
|
7 |
Twisting in high temperature |
mm |
0.2 allowed in 1600ºC |
|
8 |
Bonding in high temperature |
|
not bonded in 1600ºC |
|
9 |
20-1000ºC coefficient ofthermalexpansion |
mm.10-6/ºC.m |
8.2 |
|
10 |
Thermal conductivity |
W/m.k |
25 |
|
11 |
Electric insulation strength |
KV/mm |
20 |
|
12 |
20ºCdirect current insulation resistance |
Ohm/cm |
1014 |
|
13 |
High-temperature insulation resistance |
1000ºC MΩ |
≥0.08 |
|
1300ºC MΩ |
≥0.02 |
||
|
14 |
Thermal shock resistance |
|
4 times not cracked in 1550ºC |
|
15 |
Maximum working temperature |
ºC |
1800 |
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