Aluminium oxide ndi inorganic substance yokhala ndi formula A1203, chinthu cholimba kwambiri chomwe chimasungunuka 2054°C ndi kuwira 2980°C.Ndi kristalo wa ionic womwe ungakhaleionizedpa kutentha kwambiri ndipo amagwiritsidwa ntchito popanga zinthu zotsutsa.Aluminiyamu wowerengeka ndi aluminiyamu zonse zili ndi chinthu chomwecho, koma chifukwa cha njira zina zopangira ndi kusiyana kwa ndondomeko, kuti awiriwa agwiritse ntchito ntchito ndipo padzakhala kusiyana.
Alumina ndiye mchere waukulu wa aluminiyamu m'chilengedwe, udzaphwanyidwa ndikuyikidwa ndi kutentha kwapamwamba kwa sodium hydroxide solution kuti mupeze yankho la aluminiyamu ya sodium;fyuluta kuti muchotse zotsalira, kuziziritsa kusefa ndikuwonjezera makristasi a aluminium hydroxide, pakapita nthawi yayitali, yankho la aluminiyamu la sodium liwola ndikutulutsa aluminium hydroxide;kulekanitsa mpweya ndi kusamba, ndiye calcine pa 950-1200 ° C kupeza c-mtundu alumina ufa, calcined Alumina ndi c-mtundu alumina.Zosungunuka ndi zowira ndizokwera kwambiri.
Calcined aluminiyamu ndi insoluble m'madzi ndi asidi, amatchedwanso aluminium okusayidi mu makampani, ndipo ndi zofunika zopangira kupanga zitsulo zotayidwa;itha kugwiritsidwanso ntchito popanga njerwa zosiyanasiyana zowumbidwa, zokhotakhota, machubu okanira ndi zida za labotale zosagwira kutentha kwambiri;itha kugwiritsidwanso ntchito ngati abrasive, retardant flame and filler;high purity calcined alumina ndiyenso zopangira zopangira corundum, mwala wofiyira wofiyira komanso mwala wabuluu;imagwiritsidwanso ntchito popanga magawo a board a mabwalo amakono akuluakulu ophatikizika.Calcined alumina ndi aluminiyamu mu kupanga ndi mbali zina ndi kusiyana pang'ono, madera ogwira ntchito ndi osiyana, kotero mu kugula zinthu pamaso woyamba kupeza madera enieni ntchito.