Calcined α-Alumina Powder Description

Calcined Alumina, produced through high-temperature heating to remove chemically bound water and impurities, is prized for its exceptional purity exceeding 99%. This process enhances its suitability for diverse industrial applications. Known for its chemical inertness, calcined alumina resists corrosion in aggressive environments and maintains stability at high temperatures. Its hardness and durability make it a preferred abrasive for polishing and grinding tasks. Additionally, it serves as a vital component in ceramics, providing strength, hardness, and thermal resilience.

Calcined alumina primarily consists of alpha and gamma alumina variants. The alpha type features a hexagonal close-packed crystal lattice structure, with a melting point as high as 2050°C. It serves as a key raw material in aluminum smelting. It is used widely in refractory materials, electrical insulation, catalyst supports, and even water treatment.

Calcined α-Alumina Powder Specifications

*The above product information is based on theoretical data. For more models and detailed inquiries, please contact us.

Calcined α-Alumina Powder Applications

1. Abrasives: Used in grinding wheels, sandpapers, and abrasive powders for polishing and surface preparation in metal fabrication, automotive, and construction industries.

2. Refractories: Incorporated into refractory bricks, castables, and shapes for furnace linings, kiln furniture, and crucibles due to their high-temperature stability and resistance to thermal shock.

3. Ceramics: Essential in ceramic production for enhancing strength, hardness, and thermal properties in ceramic bodies, glazes, and specialty ceramics.

4. Electrical Insulation: Used as an insulating material in electrical components and systems where high dielectric strength and thermal stability are required.

5. Catalyst Support: Applied as a catalyst support material in chemical processes and catalytic converters due to its inertness and high surface area.

6. Water Treatment: Utilized in water purification systems for adsorption and filtration of contaminants, improving water quality.

7. High-Temperature Applications: Employed in industries requiring materials resistant to high temperatures, such as aerospace, automotive, and manufacturing sectors.

8. Cosmetics and Personal Care: Included in cosmetic formulations and toothpaste as a mild abrasive for polishing and cleansing properties.

9. Refractory Coatings: Used as coatings or additives to enhance thermal insulation and corrosion resistance in various industrial processes.

10. Chemical Processing: Used in abrasive applications and as a catalyst in chemical reactions requiring stable and inert materials.

Calcined α-Alumina Powder Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: Carton, Wooden Box, or Customized.

FAQs

Q1: What is calcined α-alumina powder?
Calcined α-alumina powder is aluminum oxide (Al₂O₃) that has been heat-treated at high temperatures to convert it into the most stable crystalline phase—alpha (α). It is widely used for its hardness, thermal resistance, and chemical inertness.

Q2: What is the difference between α-alumina and other alumina phases (like γ or δ)?
α-Alumina is the most thermodynamically stable and dense phase of alumina. Other phases (like γ, δ, θ) are metastable and have lower density and thermal stability. Only α-alumina is suitable for high-temperature structural and wear-resistant applications.

Q3: What are typical applications of calcined α-alumina?

• Advanced ceramics
• Refractories
• Polishing abrasives
• Electronic substrates
• Thermal insulation
• Filler in high-performance composites