Customization: | Available |
---|---|
Application: | Refractory, Furnace Tube |
Purity: | 99.7 |
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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 |