| Customization: | Available |
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| Application: | Refractory, Furnace Tube |
| Material: | Alumina Ceramic |
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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 |
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8 |
Bonding in high temperature |
|
not bonded in 1600ºC |
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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 |
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12 |
20ºCdirect current insulation resistance |
Ohm/cm |
1014 |
|
13 |
High-temperature insulation resistance |
1000ºC MΩ |
≥0.08 |
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1300ºC MΩ |
≥0.02 |
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14 |
Thermal shock resistance |
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4 times not cracked in 1550ºC |
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15 |
Maximum working temperature |
ºC |
1800 |
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