Aluminium Oxide (aka Alumina)
First things first, metal oxides, of which alumina and zirconia are two, are not metals. For example, rust – iron oxide – is not the same as iron metal. Secondly, it’s worth noting the naming of these materials, a formula whereby the suffix ‘-ium’ is replaced by ‘-a’. Therefore, aluminium oxide is often called alumina and sits firmly within the ceramics family of materials.
Ceramics have undergone a massive evolutionary change over the last 40 years in relation to their performance and applications. The associations that ceramics have with craft, brittle china and terracotta still exist, but the new breed of technically advanced ceramics infuses new life and new associations into this primordial material.