Aluminium oxide ndi chinthu chosapangidwa ndi zinthu zachilengedwe chokhala ndi formula ya mankhwala A1203, chinthu cholimba kwambiri chokhala ndi malo osungunuka a 2054°C ndi malo owira a 2980°C. Ndi kristalo wa ionic womwe ungathe kusungunuka.yosinthidwa kukhala ayoniPa kutentha kwambiri ndipo amagwiritsidwa ntchito kwambiri popanga zinthu zotsutsa. Alumina yokhala ndi calcium ndi alumina zonse zili ndi chinthu chomwecho, koma chifukwa cha njira zina zopangira ndi kusiyana kwa njira zina, kotero kuti ziwirizi zimagwiritsa ntchito magwiridwe antchito ndipo motero padzakhala kusiyana.
Alumina ndiye mchere waukulu wa aluminiyamu mwachilengedwe, udzaphwanyidwa ndikulowetsedwa ndi sodium hydroxide solution yotentha kwambiri kuti mupeze sodium alumina solution; sefa kuti muchotse zotsalira, muziziziritse filtrate ndikuwonjezera makhiristo a aluminiyamu hydroxide, mutatha kusakaniza kwa nthawi yayitali, sodium alumina solution idzawola ndikupangitsa aluminiyamu hydroxide kukhala yofewa; lekani precipitate ndikuitsuka, kenako muiphike pa 950-1200°C kuti mupeze ufa wa alumina wa mtundu wa c, Alumina yokhala ndi calcium ndi alumina wa mtundu wa c. Malo osungunuka ndi owira ndi okwera kwambiri.
Alumina ya Calcined siisungunuka m'madzi ndi asidi, yomwe imadziwikanso kuti aluminium oxide m'mafakitale, ndipo ndiyo chinthu chofunikira kwambiri popanga zitsulo za aluminiyamu; ingagwiritsidwenso ntchito popanga njerwa zosiyanasiyana zotsutsa, zophimba zotsutsa, machubu otsutsa ndi zida za labotale zopirira kutentha kwambiri; ingagwiritsidwenso ntchito ngati choletsa moto, choletsa moto komanso chodzaza; alumina ya calcined yoyera kwambiri ndiyonso chinthu chopangira corundum yopangira, miyala yofiira yopangira ndi miyala yabuluu yopangira; imagwiritsidwanso ntchito popanga ma substrates a bolodi amakono ophatikizana. Alumina ya Calcined ndi alumina munjira yopanga ndi zina ndizosiyana pang'ono, madera ogwirira ntchito amasiyananso, kotero pogula zinthu musanayambe koyamba kuti mudziwe madera enieni ogwiritsira ntchito.