Brown Aluminum Oxide
| Item | Value |
|---|---|
| Chemical Formula | Al₂O₃ |
| Main Content | Al₂O₃ ≥ 95.0% |
| Mohs Hardness | 9 |
| True Density | 3.8–4.0 g/cm³ |
| Bulk Density | 1.0–1.5 g/cm³ |
| Melting Point | ~2050 °C |
| Crystal Structure | Corundum |
| Color | Brown to dark brown |
| Grain Shape | Angular, sharp edges |
Chemical Composition
| Component | Content (Typical) |
|---|---|
| Al₂O₃ | ≥ 95.0% |
| TiO₂ | 1.5 – 3.5% |
| Fe₂O₃ | ≤ 0.5% |
| SiO₂ | ≤ 1.2% |
| CaO + MgO | ≤ 0.5% |
| Free Silica | None |
Brown Aluminum Oxide Main Applications
- Abrasives & Grinding Tools
- Grinding wheels
- Sanding belts & discs
- Cut-off wheels
- Resin-bonded and vitrified abrasives
- Sandblasting & Surface Treatment
- Rust removal
- Paint stripping
- Surface preparation before coating or welding
- Deburring and deflashing
- Cleaning for metal, steel, cast iron, and stone
- Refractory Materials
- High-temperature refractory bricks
- Monolithic refractories
- Furnace linings
- Slide gate plates
- Coated Abrasives
- Sandpaper
- Emery cloth
- Industrial abrasive sheets
- Polishing & Lapping
- Polishing metals, glass, ceramics, and stone
- Lapping for precision surfaces
- Anti-Slip & Wear-Resistant Materials
- Anti-slip flooring additives
- Wear-resistant coatings
- Concrete and pavement additives
- Ceramic & Composite Materials
- High-strength ceramic products
- Reinforced composite fillers
Advantages of Brown Aluminum Oxide
- High hardness and cutting efficiency
- Mohs hardness ~9, very aggressive for grinding, sandblasting, and surface preparation.
- Good toughness & long service life
- Resists shattering under impact; reusable many times in blasting operations.
- Excellent self‑sharpening property
- Particles fracture to create new sharp edges during use, maintaining high performance.
- Good thermal stability
- Suitable for high‑temperature grinding and refractory applications.
- Good chemical resistance
- Stable in most acidic and alkaline environments.
- Cost‑effective
- Lower price than white aluminum oxide, pink fused alumina, or diamond abrasives.
- Wide applicability
- Works well for steel, cast iron, stainless steel (in many cases), alloys, stone, and concrete.


