Black fused aluminum oxide is produced by smelting bauxite, iron oxide, and other elements. It offers moderate hardness, high toughness, excellent heat resistance, thermal stability, and self-sharpening. Widely used in abrasives, high-temperature processes, and wear-resistant coatings, it’s an ideal choice for diverse industrial applications.
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Physical properties |
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Crystal Form: |
Trigonal System |
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Hardness: |
9 mohs 2000-2200 kg/mm² (Vickers） |
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Grain shape: |
angular |
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Melting point: |
approx. 2050°C |
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True Density： |
≥3.50 g/cm3 |
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Typical chemical analysis |
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General |
Special |
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Al2O3: |
≥62% |
≥80% |
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TiO2: |
2-4% |
2-4% |
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Fe2O3: |
6-12% |
4-8% |
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SiO2: |
≤25% |
≤10% |
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| Available grain sizes (Average grain size) | |||
| FEPA Nr | JIS Nr | ||
| F 08 | #8 | F 90 | #120 |
| F 10 | #10 | F 100 | #150 |
| F 12 | #12 | F 120 | #180 |
| F14 | #14 | F 150 | #220 |
| F 16 | #16 | F180 | #240 |
| F 20 | #20 | F220 | #280 |
| F 22 | #24 | F230 | #320 |
| F 24 | #30 | F240 | #360 |
| F 30 | #36 | F280 | #400 |
| F 36 | #46 | F320 | #500 |
| F 40 | #54 | F360 | #600 |
| F46 | #60 | F400 | #800 |
| F 54 | #70 | F500 | #1000 |
| F 60 | #80 | F600 | #1200 |
| F 70 | #90 | F800 | #1500 |
| F 80 | #100 | F1000 | #2000 |
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