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Product description of Tabular corundum
Tabular corundum has a flaky crystal structure α- Al2O3. It is formed by sintering industrial aluminum oxide powder at a high temperature of 1800 ℃ – 1900 ℃, which is different from the process of melting corundum.
Features of Tabular corundum
Tabular corundum is a kind of sintered corundum crystal, which has the characteristics of complete shrinkage, low impurity content, small pores, low tempering shrinkage, good thermal shock stability, high temperature corrosion resistance, good creep resistance, etc.
Parameters of Tabular corundum
| Test items | Experimental data |
| Main component | α-Al2O3 |
| Mohs hardness | 9.0 |
| Application temperature | 1800℃ |
| Melting point | 2050℃ |
| Al2O3 content | ≥99.2% |
| K2O + Na2O | ≤0.40% |
| SiO2 content | ≤0.10% |
| Density (specific gravity) | ≥3.5g/cm³ |
| Apparent porosity | ≤5.0% |
| Water absorption | ≤1.5% |
| Grain size range | 0-1mm, 1-3mm, 3-5mm, 5-8mm, 8-12mm |
Application of Tabular corundum
Tabular corundum can be used in iron and steel metallurgy, casting, glass, ceramics, chemical industry, electronics and many other fields as high-grade refractories.
Advantages of Tabular corundum
- No reductant is added, and other substances will not pollute the product during processing
High temperature resistance, service temperature can reach 1800 ℃, is an excellent ultra-high temperature refractory. - Good hardness and wear resistance, Mohs hardness is 9.0, which can be used as refractory with high wear resistance requirements
- With good thermal shock resistance and high temperature creep resistance, it can be widely used as refractory castable or refractory brick
- Flake corundum develops well, shrinks completely and has low water absorption
- Good corrosion resistance, good thermo chemical stability at high temperature, and corrosion resistance to molten iron and steel
- The raw materials are stable, the process is easy to control, and the product quality is stable.