What is alumina

Alumina, also known as aluminum oxide, is significant in its use to produce aluminium metal, as an abrasive material due its inherent hardness, and as a refractory material due to high melting point.

In other applications, alumina is utilized as a porous filtration material. With heat-resistant characteristics, alumina is the base material in aluminum manufacturing, and other industrial ceramic processes. The versatility of alumina is exhibited in its inherent hardening consistency, abrasive strength, and insulation (electrical and thermal) uses.

  • Synonyms: Activated Alumina, Aluminum Oxide
  • INCI: Alumina
  • Chemical formula: Al2O3
  • CAS # 1344-28-1


Use the links below to view all package sizes for these specific products:

Alumina Tab T64
Calcined Alumina

Product specifications

AppearanceWhite to off-white spheres
SolubilitiesIsnsoluble in water

uses and applications for alumina

Alumina uses include as a desiccant, metal production, absorning water from gas and liquid solution, water treatment, ceramic engineering, filler for plastics and cosmetic products

  • Automotive Industry: It is used in the removal of scratches, dirt, and debris on a vehicle's exterior.
  • Personal Care: It helps to add level of UV protection to sunscreens and other topical creams. The ingredient is often white or colorless, and is ideal as a thickening agent for products such as cleaning products, lipsticks, and blush. With an abrasive texture, companies can implement alumina into beauty products for exfoliation.
  • Water Treatment: Activated alumina is a treatment source for water samples containing dissolved solids or sulfate concentrations.
  • Plastics: Aluminium Oxide works as a functional filler in plastic applications

Quick Answers

Alumina exists as a white crystalline material that is used as a base for smelting aluminum metals. Alumina derives from an ore called bauxite, and it is gaining use in a range of ceramic products as a functional agent ingredient.

Bauxite is a common raw material used in the process of aluminum metal production. Through the refining of bauxite, alumina is created in a powder form using caustic soda, heat, and separation techniques. Synthetic traces of alumina are generated through the following process:

  • Sources of bauxite are crushed, waxed, and dried.
  • Bauxite is filtered for the removal of impurities.
  • The solution is placed into precipitator tanks where aluminum hydroxide settles for removal.
  • Aluminum hydroxide is then heated to create alumina powder.

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