Calcined alumina is aluminum oxide that has undergone additional heat treatment. It has micropores in its structure, due to which it forms and binds much better.
In the refractory industry, it is an integral part of various types of concrete, bricks, monolithic products, insulating materials, etc.
Calcined alumina has improved mechanical strength, increased resistance to wear and abrasion, impact resistance, as well as high electrical resistance at elevated temperatures. It gives precise dimensions and shapes to finished products.
As part of refractory materials, it gives them additional properties:
This combination of properties makes calcined alumina useful in abrasives, glass, porcelain, spark plugs, and electrical insulators.
The variety of applications for calcined aluminas is due to the amazing range of properties.
The main applications for calcined alumina are refractories, glass and enamel, tiles and porcelain, mechanical, electrical and electronic ceramics, etc.