Calcined Alumina features high purity and excellent hardness, making it perfect for refractory materials, abrasives, and advanced ceramic applications. Enhance your performance.
Get A QuoteCalcined Alumina is produced by heating alumina to certain controlled temperatures for various amounts of time. We use state-of-the-art process-control equipment to produce a range of high-alpha Calcined Alumina with controlled soda chemistry, surface areas and size distributions. Calcined Alumina has a surprisingly wide range of uses, based on the nature and range of its properties, including purity, chemical inertness, resistance to corrosion, extreme hardness, resistance to wear and abrasion, heat resistance, dimensional stability, high thermal conductivity, and electric resistivity.
Mesh: -325, -500, -800
μm: 5, 3, 2, 1
Other sizes available on request.
| Composition | Refractories grade | Ceramics grade | Polishing grade |
|---|---|---|---|
| Al2O3 | 99.3 - 99.5% | 99.7 - 99.8% | ≥ 99.5% |
| Specific Gravity (H20 = 1) | 3.93 - 3.96 | 3.94 - 3.97 | 3.90 - 3.97 |
| Na2O | 0.2 - 0.4% | 0.03 - 0.2% | 0.2 - 0.3% |
| Primary Crystal Size μm | 1 - 4 | 1 - 5 | 1 - 6 |
| Fe2O3 | 0.02 - 0.05% | 0.02 - 0.03% | ≤ 0.05% |
| Mohs Hardness | 9 | 9 | 9 |
| SiO2 | 0.05 - 0.15% | 0.03 - 0.05% | 0.08 - 0.12% |
Used to produce unshaped refractories (high aluminum castables) and shaped refractories (corundum bricks) as well as monolithic and pre-cast shapes used in foundries to make steel and iron.
Used in wear-resistant ceramics, glazes, high-heat resistant tiles and porcelains, and electric and electronic ceramics.
Used for grinding and precision lapping and polishing of aluminum, steel, stainless steel, copper, stone, glass, wall and floor bricks.
Important: The technical data herein is believed to be accurate. It is offered for your consideration, investigation and verification. Buyer assumes all risk of use, storage and handling of the product.
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