Refractory BricksFused cast bricks
Fused Corundum Brick
Fused-cast corundum brick based on α- and β-alumina crystal phases, with dense crystals, excellent resistance to molten glass and high-temperature wear, and no contamination of the glass. Grades RA-αβ and RA-β.
- Grades / types
- RA-αβ, RA-β
Product overview
Fused corundum brick is based mainly on α-Al₂O₃ and β-Al₂O₃ crystal phases. Its crystals are dense, it has excellent corrosion resistance to molten glass and good wear resistance at high temperature, and it does not contaminate molten glass.
Key characteristics
- α-Al₂O₃ and β-Al₂O₃ crystal phases
- Dense crystalline structure
- Excellent corrosion resistance to molten glass
- Good wear resistance at high temperature
- No contamination of molten glass
Technical data
| Property | Unit | RA-αβ | RA-β |
|---|---|---|---|
| Al₂O₃ | % | 93~96 | 92~94 |
| K₂O+Na₂O | % | 3.2~5.0 | 5.5~7.5 |
| SiO₂+Fe₂O₃+TiO₂+CaO+others | % | ≤2.0 | ≤1.5 |
| Bulk Density (Dense Part) | g/cm³ | ≥3.3 | ≥2.8 |
| Cold Crushing Strength (CCS) | MPa | ≥200 | ≥30 |
| Bubble Precipitation Rate (1300℃×10h) | % | ≤0.3 | — |
| Static Corrosion (1350℃×48h) | mm/24h | ≤0.4 | — |
| Bulk Density (Ordinary casting) | kg/m³ | ≥3050 | ≥2500 |
| Bulk Density (Void-free casting) | kg/m³ | ≥3250 | ≥2700 |
Available grades, shapes and sizes
Available grades
- RA-αβ
- RA-β
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