Black Corundum Aluminum Oxide Sand 85% Al2O3 for Grinding and Polishing - 2050°C Melting Point, 8.0-9.0 Mohs Hardness
Black fused alumina, also known as black aluminum oxide, is a premium abrasive material manufactured from high-quality bauxite ore through electric arc furnace fusion at elevated temperatures. This industrial abrasive contains 85% Al2O3 and features a high melting point of 2050°C with moderate hardness suitable for various grinding and polishing applications.
- Color and Appearance: Black matte finish with high hardness properties
- Hardness: Mohs scale 8.0-9.0, Vickers 2000-2200 kg/mm²
- Abrasive Properties: Excellent cutting and grinding capabilities
- Strength and Durability: Superior wear resistance for demanding applications
- Chemical Composition: Primarily aluminum oxide (Al2O3) with iron oxide (Fe2O3)
| Property | Value |
|---|---|
| Color | Black |
| Crystal Structure | Trigonal |
| Hardness (Mohs) | 8.0~9.0 |
| Hardness (Vickers)(kg/mm²) | 2000~2200 |
| Melting point (°C) | 2050 |
| True density (g/cm³) | ≥3.50 |
| Level | Al2O3 | Fe2O3 | SiO2 | TiO2 |
|---|---|---|---|---|
| Ordinary | >62% | 6~12% | 2~4% | |
| Top Quality | >80% | 4~8% | 2~4% |
| Grade | Type | Size Range |
|---|---|---|
| Ordinary | Section sand | 3.0~5.0mm, 1.0~3.0mm, 0.4~1.0mm, 0~1.0mm |
| Ordinary | Grit | F12-F400 |
| Top-quality | Grit | F46-F240 |
| Top-quality | Micropowder | F280-F1000 |
- Grinding and Polishing: Manufacturing of grinding wheels, abrasive belts, and discs for metals and ceramics
- Surface Preparation: Sandblasting and shot blasting for automotive, shipbuilding, and construction industries
- Precision Cutting: Cutting wheels and discs for stainless steel, carbon steel, and alloys
- Refractory Industry: Enhances high-temperature resistance in furnace and kiln materials
- Abrasive Blasting: Industrial cleaning and surface preparation systems
- Lapping and Polishing: Precision machining for optical lenses and semiconductor wafers
- Cutting Tools: Construction and metalworking abrasive saw blades
- Refractory Castables: Aggregate material for high-performance refractory formulations
- Abrasive Powders: Fine polishing compounds for jewelry, optics, and electronics
- Tumbling and Deburring: Removal of burrs and sharp edges from metal and plastic components
- 1 ton jumbo bags
- Jumbo bags with wooden pallets
- 25kg bags (40 bags per jumbo bag)
All packaging can be customized according to specific customer requirements.
Zhengzhou Xinli Wear-resistant Materials Co. Ltd. - Founded in 1996, we are a professional manufacturer specializing in abrasives production, R&D, and sales of various wear-resistant materials. Our annual production capacity reaches 3,000 tons with certifications including PEPA, JIS, and ANSI standards.
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