Discover Pink Fused Alumina's unique blend of hardness and toughness, perfect for precision grinding and polishing applications. Elevate your performance today.
Get A QuoteThe main component of pink corundum is α-alumina, also called chromium corundum or ruby.
The main mineral composition is α-Al2O3-Cr2O3 solid solution.
The secondary mineral composition is a small amount of composite spinel (or no composite spinel) and refractory bricks with a chromium oxide content of 1% to 30%.
Chrome corundum uses aluminum oxide as the main raw material and is adapted to chromium oxide, etc. Made by smelting at high temperatures. It is pink in color, has a hardness similar to that of white corundum, and has higher toughness than white corundum. The abrasive tools made of it have good durability and high grinding finish. Suitable for precision grinding of measuring tools, machine tool spindles, instrument parts, threaded workpieces and template grinding.
| Chemistry | F12～F80 | F90～F150 | F180～F220 | |
| Low Chromium | AL2O3 | ≥98.5% | ≥98.5% | ≥98.0% |
| Cr2O3 | 0.20-0.45% | 0.20-0.45% | 0.20-0.45% | |
| NA2O | ≤0.50% | ≤0.55% | ≤0.60% | |
| Medium Chromium | AL2O3 | ≥98.2% | ≥98.2% | ≥97.8% |
| Cr2O3 | 0.45-1.0% | 0.45-1.0% | 0.45-1.0% | |
| NA2O | ≤0.55% | ≤0.60% | ≤0.70% | |
| High Chromium | AL2O3 | ≥97.4% | ≥97% | ≥96.5% |
| Cr2O3 | 1.0-2.0% | 1.0-2.0% | 1.0-2.0% | |
| NA2O | ≤0.55% | ≤0.60% | ≤0.70% | |
| Basic minerals | Crystal size | Mohs hardness | Nup hardness | Melting point | Proportion | Bulk density | Colour | Crystal form |
| α-Al2O3 | 600-800 | 9 | 2200-2300 | 2050℃ | 3.9-4.1g/cm3 | 1.40-1.91 | Pink | Polygonal shape |
| μm | kg/cm3 | g/cm3 |
| Particle size range | Low chromium | Medium chromium | High chromium |
| F12-F30 | 0.004 | 0.005 | 0.006 |
| F36-F60 | 0.0036 | 0.0045 | 0.0055 |
| F70-F120 | 0.0032 | 0.004 | 0.005 |
| F150-F220 | 0.0028 | 0.0036 | 0.004 |
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