Alumina e ntle haholo ke thepa ea bohlokoa e tala bakeng sa li-ceramic tse sebetsang. Phofo ea alumina e ntle haholo xz-L20, boholo ba likaroloana 100 nm, 'mala o mosoeu, 99% ea litaba tse tiileng. E ka eketsoa ho li-resin tse fapaneng tse thehiloeng metsing, ka har'a li-resin tse thehiloeng oling, li-solvents le li-raber ka boemo ba tlatsetso ba 3%-5%, e leng se ka ntlafatsang thatafalo ea thepa ho fihlela ho 6-8H kapa ho feta.
Grain Q-A1203, ka bokaholimo ba eona bo tlase ba lik'hemik'hale le ho hanyetsa mocheso o phahameng, ha se alumina e ommeng e sebetsang, 'me ha e na ts'ebetso ea ho kopanya. E na le khanyetso e matla ea mocheso, sebopeho se setle, mohato o tsitsitseng oa kristale, ho thatafala ho hoholo le botsitso bo botle ba litekanyo, 'me e ka sebelisoa haholo ho matlafatseng le ho tiiseng polasetiki e fapaneng, rabara, liseramike, thepa e hanyetsang le lihlahisoa tse ling, haholo-holo ho ntlafatsa ho tiea, qetello, mokhathala o chesang le o batang, ho thatafala ha ho robeha, khanyetso ea ho thekesela ha liseramike le khanyetso ea ho tsofala ha thepa ea polymer.