Aluminium Oxide
This sharp angular abrasive is the second hardest mineral after diamond.
It is fast cutting and does not contain free silica. It gives a matt finish,
or produces anchor or "tooth" patterns on most metal surfaces and can be used
economically in a closed system environment.
Applications
The range of applications is limitless - the removal of sand from casting,
surface preparation prior to enamelling, plating or bonding; etching; descaling;
deburring; cleaning moulds; glass-carvings and decorative works in glass
industry.
Typical Physical and chemical properties
| Colour |
Brown |
White |
Pink |
| Physical Nature |
Hard & Very tough |
Hard & friable |
Hard & tough |
| Particle specific activity |
3.94 |
3.90 |
3.92 |
| Melting point |
2000oC |
2050oC |
2050oC |
| Hardness MOH's Scale |
9.0 |
9.0 |
9.0 |
Typical chemical analysis
| Al2O3 |
95.40 % |
99.30 % |
99.0% |
| SiO2 |
0.70 % |
0.15 % |
0.15 % |
| Fe2O3 |
0.30 % |
0.10 % |
0.10 % |
| TiO2 |
3.00 % |
- |
- |
| CaO |
0.60 % |
0.10 % |
0.10 % |
| Na2O |
- |
0.35 % |
0.35 % |
| Cr2O3 |
- |
- |
0.3 % |
| ZrO2 + HFO2 |
- |
- |
- |
Specifications
Grade Micron size
Mesh 8 2360
Mesh 10 2000
Mesh 12 1700
Mesh 14 1400
Mesh 16 1180
Mesh 20 850
Mesh 24 740
Mesh 30 600
Mesh 36 480
Mesh 40 425
Mesh 46 326
Mesh 60 250
Mesh 80 180
Mesh 90 166
Mesh 100 150
Mesh 120 125
Mesh 150 100
Mesh 180 83
Mesh 220 68
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