Brown aluminum oxide for grinding cup wheels brown corundum
Brown aluminum oxide is made of high-quality bauxite, anthracite and iron filings. It is cooled and smelted in a high temperature by more than 2000 degrees in an electric arc. It is crushed and shaped by a jaw crusher and a ball mill. After magnetic separation, the sieve is divided into various kinds. It’s very suitable for lapping preparation before solder surface mount component on circuit board.
| Physical Composition | |
| Color | Brown |
| Moh’s hardness | ≥9 |
| Melting point | 2250℃ |
| The maximum temperature | 1900℃ |
| Specific gravity | 3.95 |
| Bulk density | 1.53-1.99g/cm3 |
| Chemical Composition | ||||
| Grits | Fines | Grains | Micro powder | |
| Al2O3 | ≥95% | ≥92% | ≥95% | ≥92% |
| SiO2 | ≤1.5% | ≤2% | ≤1.5% | ≤2% |
| Fe2O3 | ≤0.5% | ≤0.55% | ≤0.5% | ≤2% |
| TiO2 | ≤3% | ≤3.3% | ≤3% | ≤4% |
