Mpira wa alumina wosamva ma abrasion wa Microcrystalline ndi sing'anga yapamwamba kwambiri yopera, yopangidwa ndi zida zosankhidwa zapamwamba, ukadaulo wapamwamba wopanga, ndikuwotchedwa mu uvuni wotentha kwambiri.Izi zimakhala ndi kachulukidwe kwambiri, kuuma kwakukulu, kuvala pang'ono, kukhazikika kwa seismic komanso kukana kwa dzimbiri.Ndilo sing'anga yabwino kwambiri yopera glazes, billets ndi mineral powders, ndipo imagwiritsidwa ntchito ngati popera mphero za ceramic ndi simenti., zokutira, refractories, inorganic mchere ufa ndi mafakitale ena.