1. Lub cev lub cev: roj alumina yog xim dawb, tsw ntxhiab, cov hmoov. Nws cov kev nqus tshwj xeeb yog 3.9-4.1 g / nws melting point yog kwv yees li 2072 degree, thiab nws lub ntsiab lus npau npau yog kwv yees li 2980 degree. Zaub alumina kev nthuav qhia cov rwb thaiv tsev zoo thiab corrosion tsis kam, ua rau nws siv nyob rau hauv qhov chaw hnyav xws li kub siab, acids, thiab alkalis.
2. Tshuaj lom neeg: roj alumina yog cov inert oxide. Nyob rau hauv chav tsev kub, nws tsis raug nrog ntau tshuaj lom neeg thiab tsis yooj yim oxidized los ntawm molten alkali meds, tooj liab, nyiaj, kub, thiab lwm yam xim hlau. Txawm li cas los xij, ntawm cov kub, nws tuaj yeem hnov mob nrog cov tshuaj pleev cov tshuaj txhuam los ua cov hexafluoroaluminate (Alf₆).
