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Our Product
WHITE FUSED ALUMINA
White Fused Alumina (WFA) is derived from calcined alumina using a specific electro fusion process, resulting in a highly pure and durable abrasive and refractory material. It features high chemical stability and high melting point which makes it a material of choice for high-performance applications.
Detailed Chemical and Physical Properties
| Component | Chemical Composition |
|---|---|
| Al2O3 | 99.5% minimum, promoting exceptional hardness and thermal properties. |
| SiO2 | Maximum 0.3%, minimizing brittleness. |
| Fe2O3 | Typically less than 0.1%, to ensure high purity necessary for sensitive applications. |
| Na2O | Controlled below 0.4% to prevent any adverse effects on chemical stability. |
| Other oxides | Trace amounts of TiO2, CaO, MgO, each below 0.05%. |
Typical chemical analysis
| Component | White Fused Alumina |
|---|---|
| Al2O3 | 99.73 %, |
| Na2O | 0.14 %, |
| Fe2O3 | 0.03 %, |
| SiO2 | 0.01 %, |
| CaO | 0.02 %, |
| TiO2 | 0.02 %, |
| MgO | 0.01 %, |
| Component | White Fused Alumina |
|---|---|
| Al2O3 | 99,73 % |
| Na2O | 0,14 % |
| Fe2O3 | 0,03 % |
| SiO2 | 0,01 % |
| CaO | 0,02 % |
| TiO2 | 0,02 % |
| MgO | 0,01 % |
WFA Specifications
| Parameter | Specifications |
|---|---|
| Al2O3 | 99% min |
| SiO2 | 0,1 % max |
| Na2O | 0,3 % max |
| Fe2O3 | 0,2 % max |
| B.D | 3.6 g/cc min |
| Component | White Fused Alumina |
|---|---|
| Al2O3 | 99,73 % |
| Na2O | 0,14 % |
| Fe2O3 | 0,03 % |
| SiO2 | 0,01 % |
| CaO | 0,02 % |
| TiO2 | 0,02 % |
| MgO | 0,01 % |
Physical Characteristics
- Color: Pure white, indicating the absence of impurities.
- Density: 3.50 – 3.55 g/cm³, ideal for abrasive and refractory applications.
- Melting Point: Approximately 2250°C, suitable for high-temperature applications.
- Grain Shape: Predominantly angular, providing sharp cutting edges for abrasive applications
- Hardness: 9 on the Mohs scale, comparable to corundum.
Production Process
- Synthesis: Produced by the controlled fusion of high-purity alumina in an electric arc furnace.
- Processing: Includes cooling, crushing, magnetic separation to remove residual iron, and precise sieving to achieve desired grain sizes. Granular Size Specification
Granular Size Specification
- Micro Grits: Specifically designed for precision applications, available in FEPA sizes from F230 to F1200.
- Macro Grits: Ranging from F10 to F220, suitable for abrasive and refractory applications.
- Custom Sizes: Tailored to customer specifications including specific mesh Sizes for special applications.
- Grain Shape: Predominantly angular, providing sharp cutting edges for abrasive applications
- Hardness: 9 on the Mohs scale, comparable to corundum.
Extensive Applications
- Abrasives Industry: Utilized in bonded abrasives (grinding wheels, cutting discs) and coated abrasives (sandpaper, abrasive cloths).
- Refractories: Key material in the production of refractory bricks, castables, and mortars due to its high melting point and chemical inertness
- Ceramic Production: Used in the manufacture of high-grade ceramic products, including insulators and laboratory equipment.
- Surface Treatment: Preferred media for high-purity blasting applications and surface preparation tasks.
- Polishing Media: Employed in the production of polishing compounds for electronics, automotive, and optical materials.
- Composite Materials: Incorporated in composite coatings for wear and corrosion protection
- Other Advanced Applications: Used in filtration systems, biomedical materials, and as a raw material in the synthesis of advanced ceramics.
