Aluminium oxide yog ib yam khoom tsis muaj zog nrog cov tshuaj formula A1203, ib qho nyuaj heev nrog lub melting point ntawm 2054 ° C thiab boiling point ntawm 2980 ° C.Nws yog ionic siv lead ua uas tuaj yeem ua tauionizedntawm qhov kub thiab txias thiab feem ntau yog siv rau hauv kev tsim cov khoom siv refractory.Calcined alumina thiab alumina ob leeg muaj tib yam khoom, tab sis vim qee txoj kev tsim khoom thiab lwm yam txheej txheem sib txawv, yog li ob qho tib si hauv kev siv cov kev ua tau zoo thiab yog li yuav muaj qee qhov sib txawv.
Alumina yog cov ntxhia tseem ceeb ntawm txhuas hauv qhov xwm txheej, nws yuav raug crushed thiab impregnated nrog kub kub sodium hydroxide tov kom tau sodium alumina tov;lim kom tshem tawm cov residue, txias cia cov lim thiab ntxiv aluminium hydroxide crystals, tom qab lub sij hawm ntev stirring, sodium alumina tov yuav decompose thiab precipitate aluminium hydroxide;cais cov precipitate tawm thiab ntxuav nws, ces calcine nws ntawm 950-1200 ° C kom tau c-hom alumina hmoov, calcined Alumina yog c-hom alumina.Cov ntsiab lus melting thiab boiling yog siab heev.
Calcined alumina yog insoluble hauv dej thiab kua qaub, tseem hu ua aluminium oxide hauv kev lag luam, thiab yog cov khoom siv raw khoom siv rau kev tsim cov txhuas hlau;Nws tseem tuaj yeem siv rau hauv kev tsim ntau yam refractory bricks, refractory crucibles, refractory hlab thiab kub resistant kuaj ntsuas;nws kuj tseem siv tau los ua ib qho abrasive, nplaim retardant thiab muab tub lim;siab purity calcined alumina kuj yog raw khoom rau zus tau tej cov corundum, dag liab master pob zeb thiab xiav master pob zeb;nws kuj tseem siv rau kev tsim cov board substrates rau niaj hnub loj-scale integrated circuits.Calcined alumina thiab alumina nyob rau hauv cov txheej txheem ntau lawm thiab lwm yam yog nyob rau hauv ib tug me ntsis sib txawv, cov kev siv ntawm kev lag luam cheeb tsam kuj txawv, yog li ntawd nyob rau hauv kev yuav khoom ntawm cov khoom ua ntej thawj mus nrhiav tau tawm qhov tshwj xeeb thaj chaw ntawm kev siv.