White Calcinated Alumina (A12O3, also known as Alumina and White Aluminum Oxide powders) is extremely soft, friable, sharp abrasive, similar to Brown aluminum Oxide and has a very low iron content. WCA has lower hardness and abrasive capacity than fused Aluminum Oxides.
Applications
WCA is perfect material for polishing of glass, quartz, semiconductor materials such as silicon, sapphire, gallium arsenide and cadmium telluride). WCA is widely used for grinding ferrous materials, finishing tough and hard materials, making ceramic parts when the processing cost is important.
Typical Chemical Data
| Aluminum Oxide | 99.80 (typ.) |
| Silica | 0.01-0.05% |
| Iron Oxide | 0.01-0.03% |
| Calcium Oxide | 0.01-0.03% |
| Na2O | 0.01-0.10 |
Physical Data
| Structure: | Monocrystalline |
| Particle shape: | Blocky, sharp edged |
| Color: | White |
| Friability: | Friable |
| Moh’s Scale: | 9 |
| Maximum working temperature: | 1650 ͦ F |
| Density (g/cc): | 3.8 |