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.