What is Calcined Alumina Used For

What is Calcined Alumina Used For? Calcined alumina is produced by heating alumina hydroxide or industrial alumina at an appropriate temperature, in order to partially or fully convert it to Al2O3. It differs from activated alumina which has catalytic properties and can act as a desiccant.

This cone 6 matte glaze contains different amounts of super fine calcined alumina (4%, 8% and 15%) for added cutlery resistance; however the addition of the higher concentration (8% alumina) increases staining potential more than any of its counterparts.

Aluminum oxide is used in ceramics due to its excellent compressive strength and abrasion resistance, low thermal expansion rate and resistance against chemical attack. Furthermore, it boasts electrical insulating capabilities which is key in modern electronics.

Aluminium oxide is used in products requiring high levels of durability and performance, such as insulators and catalyst supports for use in the petrochemical industry, to help reduce environmental pollution by supporting chemical reactions in more eco-friendly ways.

Calcination involves heating aluminum hydroxide at various temperatures to control its hardness and abrasiveness, before grinding to produce a fine powder used to formulate ceramic bodies and glazes. Once complete, these materials can withstand high temperatures while resisting abrasion, cracking, erosion and are ideal for fast temperature changes.