I-aluminiyam oxide yinto engabonakaliyo kunye ne-chemical formula A1203, ikhompawundi eqinile kakhulu enendawo yokunyibilika ye-2054 ° C kunye neqondo lokubilisa lika-2980 ° C.Yikristale ye-ionic enokubakhoionizedkumaqondo aphezulu kwaye isetyenziswa ngokuqhelekileyo ekwenzeni izinto eziphikisayo.Calcined alumina kunye alumina zombini ziqulathe into efanayo, kodwa ngenxa yezinye iindlela imveliso kunye nezinye iiyantlukwano inkqubo, ukuze ezimbini ekusebenziseni ukusebenza kwaye ngoko kuya kubakho umahluko.
I-alumina yeyona minerali iphambili ye-aluminiyam kwindalo, iya kutyunyuzwa kwaye ifakwe ngesisombululo se-sodium hydroxide yobushushu obuphezulu ukuze ifumane isisombululo se-alumina ye-sodium;Isihluzo sokususa intsalela, sipholisa ifiltrate kwaye ungeze iikristale ze-aluminium hydroxide, emva kwexesha elide lixhokonxa, isisombululo se-alumina yesodium siya kubola kwaye sikhuphe i-aluminium hydroxide;ukwahlula i-precipitate ngaphandle kwaye uyihlambe, emva koko i-calcine kwi-950-1200 ° C ukuze ufumane i-c-type alumina powder, i-calcined Alumina yi-c-type alumina.Amanqaku okunyibilika kunye nokubilisa aphezulu kakhulu.
I-alumina ene-calcined ayinyibiliki emanzini kunye ne-asidi, eyaziwa ngokuba yi-aluminium oxide kwishishini, kwaye iyona nto isisiseko sokuvelisa isinyithi se-aluminium;inokuphinda isetyenziswe ekuveliseni izitena ezahlukeneyo ezichasayo, ii-crucibles refractory, iityhubhu eziphikisayo kunye nezixhobo zebhubhu ezichasene nobushushu obuphezulu;inokuthi isetyenziswe njenge-abrasive, i-flame retardant kunye ne-filler;ukucoceka okuphezulu kwe-alumina ye-calcined nayo iyimathiriyeli ekrwada yokuveliswa kwe-corundum yokwenziwa, ilitye elibomvu elibomvu kunye nelitye eliluhlaza okwesibhakabhaka;ikwasetyenziselwa ukuveliswa kweebhodi ezingaphantsi kweesekethe ezihlanganisiweyo zanamhlanje.I-alumina ene-calcined kunye ne-alumina kwinkqubo yokuvelisa kunye neminye imiba ikumahluko omncinci, iindawo zoshishino ezisebenzayo nazo ziyahluka, ngoko ekuthengeni iimveliso ngaphambi kokuqala ukufumana iindawo ezithile zokusetyenziswa.