Ruby Pink Fused Alumina Properties
The production process of Ruby Pink Fused Alumina is roughly similar to that of white fused alumina. With industrial aluminum oxide powder as the main raw material, Ruby Pink Fused Alumina is smelted by adding 0.5%-3% Cr2O3. After smelting with chromium oxide, the color of the Ruby Pink Fused Alumina grit obtained is rose pink color, so the Ruby Pink Fused Alumina is also called pink corundum.
The effect of adding chromium oxide :
Between Cr2O3 and Al2O3 there will get a continuous solid solution. In the corundum, Cr2O3 exists between the corundum crystals in the form of replacement solid solution. Chromium replaces Al3+ with Cr3+ in the corundum crystal lattice. It causes a certain degree of deformation of the crystal lattice. The surface distance between crystals increases. From the aspect of performance, the impact resistance of the crystal is increased. In the meantime, the physical and mechanical properties, grinding ability and toughness of corundum are improved.
Compared with white fused alumina, the advantages of Ruby Pink Fused Alumina are reflected in the following aspects ( take 46 mesh and 80 mesh as examples):
| Sample No. | Bulk Density （g/cm3） | Crystal structure（%） | Roughness（%） | Grinding Ability（grinding glass） | ||
| Monocrystal | Compact aggregate crystal | Aggregate crystal | ||||
| PA F46 | 1.88 | 65.2-69.7 | 17.3-17.9 | 13.5-16.9 | 130-150 | |
| PA F80 | 1.72 | 103-106 | ||||
| WA F46 | 1.82 | 65.15 | 15.25 | 19.60 | 100 | |
| WA F80 | 1.58 | 100 | ||||
Because Ruby Pink Fused Alumina has better toughness, when used in the production of abrasive products, it can significantly improve the service life, sharpness, grinding force and other properties of the abrasive cutting & grinding wheels. And it can also prevent burning damage to the workpiece during the grinding process.
