Wose ŵaŵiri calcined alumu na alumina ŵali na chinthu chimoza, kweni chifukwa cha nthowa zakupambanapambana zakupangira na ndondomeko zinyake, paliso vinyake ivyo vikupambana pa umo vikuchitira na vinyake vya viŵiri vya viŵiri . .
Bauxite ndiyo mineramu yikuru ya aluminiyamu mu chilengiwa. Pamanyuma pa kuwuphwanya, yikuŵikika na sodium hydroxide yakutentha chomene kuti yiŵe na sodium ya alumina ya sodium; vyakukhalapo vikusefeka kuti vifumiske vyakukhalapo, filfate yikuzizima ndipo makristalo gha aluminiyamu hydroxide ghakusazgikira . Pamanyuma pa nyengo yitali yakusunkhunya, aluminiyamu Nthowa ya sodium yizamupatulako aluminiyamu hydroxide preplitate; precipitate yikupatulika na kusambika, ndipo pamanyuma pake yikupimika pa msinkhu wa 950-1200℃kuti yisangike -mtundu wa alumina wa alumina, ndipo alumina wakupimika ni -mtundu alumina.
Mu kristalo lattice wa alumina wa calcinaed, oxygen ayoni wakupakira chomene mu hexagon, ndipo Al3+ yikugaŵika mwakuyana mu octahedral coordination term malo ghakuzingilizgika na ioni ya octahedral yakuzingilizgika na oxygen ions. Nkhongono ya lattice njikuru, ntheura malo ghakusungunuka na malo ghakuwira ghali pachanya . Kupenda alumina wakutondeka mu maji na asidi . Ikuchemekaso aluminiyamu oxide mu mafakitale . Ni chinthu chakwamba chakupangika pakupanga aluminiyamu wachisulo . Yingagwiriskikiya so nchitu pakupanga njerwa zakupambanapambana zakukanizga, ma crucibles a refractory, chubu cha refractory, ndi vipangizu vakuyezgayezga vakukhoza ukongwa; Abrasives, feame retardants, fillers, etc.; alumina wakupangika na purity wapachanya nayo ni chinthu icho ŵakupanga kuti ŵapange corundum yakupangika, ruby na safiro yakupangika na safiro; likugwiriskirikaso nchito pakupanga maseŵero gha mazuŵa ghano ghakusazgapo madera ghakuru ghakusazgako .
Γ-mtundu waluminali ukupangika na kusoŵa maji mu aluminiyamu hydroxide pa msinkhu wakucepa wa 140-150 digiri , iyo yikuchemekaso aluminina na aluminiyamu glue . Oxygen ions mu kapangidwe ili pafupifupi kukuzura mu ndege zakuyimilira, ndipo Al3+ yikugaŵika mwakupambanapambana mu octahedral na tetrahedral voids yakuzingilizgika na mphepo ya oxygen ions{{4}type alumina yikusungunuka mu maji yayi, kweni yingasungunuka mu asidi wankhongono panji ya nkhongono ya alkali . Para yatenthemeska kufika pa 1200℃, yikusinthika chomene kuŵa alumina ya calcined alumina.
Pali kusiyana pakati pa alumina ya calcired alumina na alumina pa nkhani ya kupanga, ndipo minda ya mafakitale iyo yikugwiriskirika nchito nayo njakupambana na . Ntheura, pambere mundagule chinthu, mukwenera kusanga malo ghakugwiriskira ntchito pambere mundagule .
