β Corundum Casting Blocks
| β Corundum Casting Blocks made of β alumina, has strong resistance to desquamation, especially to the strong alkaline stream. The product is best used on top of the structure where less scattered glass material powder exists.
Chemical Composition （ % ） |
RA-H |
SiO 2 |
0.2 |
Al 2 O 3 |
93 |
Na 2 O |
6.5 |
Fe 2 O 3 |
Tiny |
TiO 2 |
Tiny |
Physical Properties |
True Density (g/cm 3 ) |
3.26 |
Cold Crushing Strength (Mpa) |
30 |
Thermal Expansion Rate （ % ） |
1000°C |
0.65 |
1500°C |
1.01 |
Bulk Density （ g/cm 3 ） |
PT |
2.8 |
WS |
3 |
Crystalline Phase Composition （ % ） |
Glass Phase |
<1 |
α-Corundum |
-- |
β-Corundum |
>99 |
|
