Alumina, kapa aluminium oxinde, e ka hlahisoa ka bohloeki. Mebala e tloaelehileng e sebelisetsoang lits'ebetso tsa sejoale-joale tsa li indasteri ke 99.5% ho 99.9% e nang le litlatsetso tse etselitsoeng ho ntlafatsa thepa. Mekhoa e mengata e fapaneng ea lefutso e ka sebelisoa ho kenyelletsa lechi kapa sebopeho sa marang-rang ho hlahisa boholo le libopeho tsa karolo.

Alumina ke boitsebiso bo sebelisitsoeng haholo likolong tse latelang:

■ Likhatiso tsa motlakase, likarolo tse kharamelang li-lasers tsa gase, bakeng sa lisebelisoa tsa semiconductor (tse kang Chuck, pheletso ea tiiso, Seal

■ Mahlale a motlakase bakeng sa li-tubers tsa elektrone.

■ Likarolo tsa sebopeho bakeng sa lisebelisoa tse phahameng tsa Crysuge le lisebelisoa tsa Cryogenic, lisebelisoa tsa mahlaseli a nyutlelie, lisebelisoa tse sebelisoang ho mocheso o phahameng.

■ likarolo tse khang - Piston bakeng sa lipompo, li-valis le litsamaiso tsa Thesing, li-valves tsa mali.

■ Thermocouple pubus, bahlahlobi ba motlakase, mecha ea litaba, mecha ea phatlalatso, thipa.