Alumina, ama aluminium oxyde, waxaa lagu soo saari karaa daahir badan. Darajooyinka caadiga ah ee loo isticmaalo barnaamijyada warshadaha casriga ah waa 99.5% ilaa 99.9% qaba waxyaabaha lagu daro ee loogu talagalay in lagu xoojiyo guryaha. Qaababka wax badan oo kala duwan ayaa lagu dabaqi karaa oo ay ku jiraan mashiinka ama qaab saafiga ah oo qaabeysan oo ay soo saaraan cabbirro badan oo kala duwan iyo qaabab qayb ah.

Alumina waa qalab dhoobo ah oo loo isticmaalo codsiyada soo socda:

■ Insulayaasha korantada, qaybaha iska caabbinta ee loo yaqaan 'Cheats Insulaces' ee loo yaqaan 'lesers-ka gaaska', qalabka wax lagu farsameeyo ee semiconductor (sida chuck, entrone, enctioper.

■ Insulayaasha korantada tuubooyinka elektiroonigga ah.

■ Qaybaha dhismeyaasha ee ku saabsan faaruqa sare iyo qalabka dhawaaqa, aaladaha shucaaca nukliyeerka, qalabka loo isticmaalo heerkul-heer sare ah.

■ Waxyaabaha caabbinta ah ee caabbinta, bastoolada bambooyinka bambooyinka, tuubooyinka iyo nidaamyada qaadashada, tigidhada muunad dhiig.

■ Tuubbooyinka tuulmo ah, insulayaal korantada, mishiinnada shiidista, the the the the the theadguides.