Complaint
Alumina (also known as Corundum or Aluminium Oxide) is the family name for inorganic compounds with the chemical formula Al2O3.
JUNDA offer Brown and White Fused Alumina for the Refractory industry.
Brown Fused Alumina is a dense material produced from bauxite raw material. The end product has a low iron content making it particularly valuable in refractory applications.
White Fused Alumina is produced by fusing calcined alumina. It is white in colour, a dense mineral and has predominantly large crystals of Alpha Alumina.
| Product name | Typical Physical Properties | Proximate Chemical Analysis | ||||||
White Aluminum Oxide Grit | Color | Grain Shape | Crystallinity | Hardness | Specific Gravity | Bulk Density | Al2O3 | ≥99% |
| White | Angular | Coarse Crystal | 9 Mohs | 3.8 | 106 lbs / ft3 | TiO2 | ≤0.01% | |
| CaO | 0.01-0.5% | |||||||
| MgO | ≤0.001 | |||||||
| Na2O | ≤0.5 | |||||||
| SiO2 | ≤0.1 | |||||||
| Fe2O3 | ≤0.05 | |||||||
| K2O | ≤0.01 | |||||||
| White Aluminum Oxide Grit Specifications | |
| Mesh | Average Particle Size the smaller the mesh number, the coarser the grit |
| 8 Mesh | 45% 8 mesh (2.3 mm) or larger |
| 10 Mesh | 45% 10 mesh (2.0 mm) or larger |
| 12 Mesh | 45% 12 mesh (1.7 mm) or larger |
| 14 Mesh | 45% 14 mesh (1.4 mm) or larger |
| 16 Mesh | 45% 16 mesh (1.2 mm) or larger |
| 20 Mesh | 70% 20 mesh (0.85 mm) or larger |
| 22 Mesh | 45% 20 mesh (0.85 mm) or larger |
| 24 Mesh | 45% 25 mesh (0.7 mm) or larger |
| 30 Mesh | 45% 30 mesh (0.56 mm) or larger |
| 36 Mesh | 45% 35 mesh (0.48 mm) or larger |
| 40 Mesh | 45% 40 mesh (0.42 mm) or larger |
| 46 Mesh | 40% 45 mesh (0.35 mm) or larger |
| 54 Mesh | 40% 50 mesh (0.33 mm) or larger |
| 60 Mesh | 40% 60 mesh (0.25 mm) or larger |
| 70 Mesh | 45% 70 mesh (0.21 mm) or larger |
| 80 Mesh | 40% 80 mesh (0.17 mm) or larger |
| 90 Mesh | 40% 100 mesh (0.15 mm) or larger |
| 100 Mesh | 40% 120 mesh (0.12 mm) or larger |
| 120 Mesh | 40% 140 mesh (0.10 mm) or larger |
| 150 Mesh | 40% 200 mesh (0.08 mm) or larger |
| 180 Mesh | 40% 230 mesh (0.06 mm) or larger |
| 220 Mesh | 40% 270 mesh (0.046 mm) or larger |
| 240 Mesh | 38% 325 mesh (0.037 mm) or larger |
| 280 Mesh | Median: 33.0 - 36.0 micron |
| 320 Mesh | 60% 325 mesh (0.037 mm) or finer |
| 360 Mesh | Median: 20.1-23.1 micron |
| 400 Mesh | Median: 15.5-17.5 micron |
| 500 Mesh | Median: 11.3-13.3 micron |
| 600 Mesh | Median: 8.0-10.0 micron |
| 800 Mesh | Median: 5.3-7.3 micron |
| 1000 Mesh | Median: 3.7-5.3 micron |
| 1200 Mesh | Median: 2.6-3.6 micron |
3. TYPICAL PROPERTIES
High Hardness
High Compression Strength
Abrasion/ Wear-Resistance
Abrasives
Chemical Inertness
High Degree of Refractoriness
Superior Electrical Insulating Properties
Dielectric Properties
High Melting Point
