Aluminom oxide bụ ihe inorganic nke nwere usoro kemịkalụ A1203, ogige siri ike nke ukwuu nke nwere ebe mgbaze nke 2054°C yana ebe esi 2980°C.Ọ bụ kristal ionic nke nwere ike ịbụionizedna okpomọkụ dị elu ma a na-ejikarị eme ihe na-emepụta ihe ndị na-emegharị ihe.Calcined alumina na alumina ma nwere otu ihe, ma n'ihi na ụfọdụ mmepụta ụzọ na ndị ọzọ usoro iche, nke mere na abụọ na ojiji nke arụmọrụ na otú a ga-enwe ụfọdụ iche.
Alumina bụ isi mineral nke aluminom na okike, a ga-egwepịa ya ma tinye ya na ngwọta sodium hydroxide dị elu iji nweta ngwọta sodium alumina;nzacha iji wepụ ihe fọdụrụnụ, mee ka nzacha ahụ dị jụụ ma gbakwunye kristal aluminom hydroxide, mgbe ogologo oge na-akpali akpali, ngwọta sodium alumina ga-emebi ma mee ka aluminum hydroxide pụta;kewapụ ihe na-asọpụta ma saa ya, wee kụọ ya na 950-1200 ° C iji nweta c-ụdị alumina ntụ ntụ, calcined Alumina bụ c-ụdị alumina.Ebe na-agbaze na isi ihe dị oke elu.
Calcined alumina bụ insoluble na mmiri na acid, nke a makwaara dị ka aluminum oxide na ụlọ ọrụ, na bụ isi akụrụngwa maka mmepụta nke aluminum metal;a pụkwara iji ya na-emepụta brik dị iche iche, ihe ndị na-eme ka ọkpụkpụ, tubes refractory na ngwá ọrụ ụlọ nyocha dị elu na-eguzogide okpomọkụ;a pụkwara iji ya mee ihe dị ka ihe abrasive, ọkụ na-egbochi ọkụ na ndochi;elu ịdị ọcha calcined alumina bụkwa ihe akụrụngwa maka mmepụta nke corundum wuru, nkume nna ukwu na-acha uhie uhie na nkume na-acha anụnụ anụnụ;a na-ejikwa ya maka imepụta ihe mpempe akwụkwọ maka sekit jikọtara ọnụ nke oge a.Calcined alumina na alumina na usoro mmepụta na akụkụ ndị ọzọ dị na ntakịrị ihe dị iche iche, mpaghara ụlọ ọrụ ọdabara dịkwa iche iche, ya mere na ịzụrụ ngwaahịa tupu mbụ iji chọpụta ebe a kapịrị ọnụ.