Aluminum Oxide

Aluminum Oxide granules are small, coarse particles of aluminum oxide commonly used in a range of industrial applications, such as abrasive blasting, ceramics, polishing, and as a raw material in refractory products. Aluminum oxide granules are known for their hardness, chemical inertness, and thermal stability, making them valuable for applications that require durability and resistance to high temperatures.

Composition:

Aluminum Oxide granules are typically high-purity, often 99.5% or more, to ensure effectiveness in demanding applications. This high purity level ensures that the granules are chemically inert and free from contaminants that could affect performance, especially in precision processes.

Physical Form:

Granule Size: Available in various sizes, ranging from coarse particles to fine granules, allowing for customization based on the intended use.

Shape and Consistency: Aluminum oxide granules are usually angular and hard, which makes them highly effective as an abrasive or blasting medium.

Thermal Stability and Resistance:

High Melting Point: With a melting point around 2072°C (3762°F), aluminum oxide granules can withstand extreme temperatures, making them suitable for high-temperature applications such as refractory linings and kiln furniture.

Thermal Conductivity: Al₂O₃ has moderate thermal conductivity, helping in heat dissipation in applications like ceramics and metal casting.

Hardness and Abrasive Quality:

Extreme Hardness: Ranking at about 9 on the Mohs hardness scale, aluminum oxide is extremely hard, making granules ideal for abrasive applications, such as sandblasting, polishing, and grinding.

Wear Resistance: The hardness and durability of aluminum oxide granules make them long-lasting in abrasive applications, where they can repeatedly break down materials without significant wear.

Chemical Inertness: Aluminum oxide is highly resistant to chemical reactions, making it suitable for use in environments with exposure to acids, alkalis, and other harsh chemicals. This inertness is particularly important in applications like refractory materials and catalysts.

Applications:

Abrasive Blasting: Aluminum Oxide granules are widely used as a blasting medium for cleaning, finishing, and surface preparation due to their hardness and ability to efficiently remove material without contaminating surfaces.

Ceramics and Refractories: Used in the production of advanced ceramics and refractory products, aluminum oxide granules provide strength, wear resistance, and thermal stability.

Polishing and Grinding: Aluminum Oxide granules are used in polishing compounds, grinding wheels, and sandpaper for their abrasive properties.

Catalyst and Catalyst Supports: Due to their high surface area and stability, aluminum oxide granules can serve as a base material in catalysts for industrial chemical reactions.

Heat Dissipation: In castable refractory products, the granules help with thermal management in high-temperature environments, such as furnaces and kilns.