Characteristics of our Black Fused Alumina:
Choosing selected bauxite and iron oxide as raw material be smelted in tilting electrical arc furnace
Strong cutting force
Moderate hardness but good toughness and self-sharpening
Good abrasion resistance
Less heat value and efficient productivity
High temperature resistance
Suitable for grinding and polishing of stainless steel, non-ferrous metals and optical glass, the ideal material for resin grinding wheel and sand cloth and paper
| Grit |
Chemical Composition |
| Al2O3 ≥ % |
SiO2≥ % |
Fe2O3 ≥ % |
TiO≤ % |
| 24#-100# |
77.0 |
11.0 |
5.0 |
3.5 |
| 120#-200# |
75.0 |
9.0 |
4.0 |
3.0 |
| 240#-280# |
64.0 |
10.0 |
7.0 |
3.0 |
Physical Characteristics:
| Crystal |
Trigonal system |
| Hardness(Mohs) |
> 9.0 |
| The maximum temperature |
1850º C |
| True density(g/cm3) |
> 3.50 |
Linear expansion coefficient
(0-1600º C) |
7-9 |
Audited Supplier 
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