Superfine alumina ndi chinthu chofunikira kwambiri chopangira zida zadothi zogwira ntchito.Superfine alumina ufa xz-L20, tinthu kukula 100 nm, mtundu woyera, 99% olimba okhutira.Zitha kuwonjezeredwa ku ma resins osiyanasiyana opangidwa ndi madzi, mkati mwa mafuta opangira mafuta, zosungunulira ndi ma rubbers pamlingo wowonjezera wa 3% -5%, womwe ukhoza kusintha kwambiri kuuma kwa zinthuzo mpaka 6-8H kapena kupitilira apo.
Grain Q-A1203, yokhala ndi mankhwala otsika komanso kukana kutentha kwambiri, si alumina wowuma, ndipo ilibe ntchito zothandizira.Iwo ali amphamvu kutentha kukana, formability wabwino, khola crystalline gawo, kuuma mkulu ndi wabwino dimensional bata, ndipo chimagwiritsidwa ntchito kulimbikitsa ndi toughening zosiyanasiyana mapulasitiki, mphira, zoumba, zipangizo refractory ndi zinthu zina, makamaka kusintha makulidwe, kumaliza, kutentha ndi kuzizira kutopa, kulimba kwa fracture, kukana kwa ceramic ndi kukana kuvala kwa zida za polima.