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| PRODUCT |
| alumdum 、alumina |
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| item |
index |
| white alundum |
brown alundum |
high alumina alundum |
α － Al 2 O 3 |
manufactured alumina |
| chemical composition ％ |
Al2O3 |
≥ 98.0 |
≥94.5 |
≥98.0 |
≥99.5 |
≥98.4 |
| SiO2 |
≤ 0.5 |
≤ 0.5 |
≤ 0.5 |
≤ 0.06 |
≤ 0.06 |
| Fe2O3 |
≤0.2 |
≤0.5 |
≤0.2 |
≤0.03 |
≤0.04 |
| TiO2 |
≤0.65 |
≤0.65 |
≤1.0 |
－ |
－ |
| CaO+MgO |
≤0.4 |
≤0.5 |
≤0.5 |
－ |
－ |
| K2O+Na2O |
≤0.2 |
≤0.3 |
≤0.3 |
≤0.05 |
≤0.6 |
| C |
≤0.2 |
≤0.2 |
≤0.2 |
－ |
－ |
| volume density g/cm3 |
>3.90 |
>3.90 |
>3.80 |
>3.90 |
－ | |
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