Calcined Alumina

Product Overview

Calcined alumina is a high-purity aluminium oxide produced through the controlled thermal treatment of alumina hydrate. The calcination process creates a stable alpha-alumina phase with high hardness, excellent thermal stability and strong chemical resistance, making it a widely used performance material in refractory and advanced ceramic systems.

In refractory formulations, calcined alumina contributes to mechanical strength, abrasion resistance and high-temperature durability. Its controlled particle size distribution supports packing density and microstructural development in bricks, castables and monolithic refractories.

Calcined alumina is selected where high purity, thermal stability and consistent performance are required in demanding high-temperature and wear-resistant applications.

Technical Profile of Calcined Alumina

High-purity aluminium oxide providing thermal stability, hardness and chemical resistance in refractory and high-temperature applications.

Molar Weight

101.96 g/mol

Melting Point

~2,072 °C

Boiling Point

~2,977 °C

Flash Point

Not applicable

Form

White to off-white dense granules or aggregates

Key Industries of Calcined Alumina

Industries served by this product.

Refractories

RBH supplies high quality minerals and specialist raw materials for refractory formulations, supporting thermal stability, durability, and process reliability in high temperature applications across a wide range of industrial applications.

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Packaging & Availability

Available in multiple packaging formats to suit your processing needs, supplied under ISO 9001 quality management systems. Contact RBH for regional stock or customised packing options.

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Product Overview

Technical Profile of Calcined Alumina

Key Industries of Calcined Alumina

Refractories

Packaging & Availability

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