Alumina, kapa Aluminium Oxide, e ka hlahiswa ka mefuta e fapaneng ya bohloeki. Mekgahlelo e tlwaelehileng e sebediswang bakeng sa ditshebediso tsa sejwalejwale tsa indasteri ke 99.5% ho isa ho 99.9% ka di-additi tse reretsweng ho ntlafatsa thepa. Mekgwa e mengata e fapaneng ya ho sebetsana le letsopa e ka sebediswa ho kenyeletswa le ho sebetsa ka machining kapa ho bopa sebopeho sa letlowa ho hlahisa mefuta e fapaneng ya boholo le dibopeho tsa karolo.
Li-ceramic tsa Al2O3 li na le melemo e latelang:
1. Bothata bo phahameng (bothata ba MOHS ke 9) le ho hanyetsa ho tsofala hantle.
2. Matla a matle a mechini. Matla a ho kobeha ha eona a ka fihla ho 300~500MPa.
3. Ho hanyetsa mocheso hantle. Mocheso oa eona o sebetsang o ka fihla ho 1000℃.
4. Ho hanyetsa ho hoholo le thepa e ntle ea ho thibela motlakase. Haholo-holo ka ho thibela mocheso o phahameng o motle (ho thibela mocheso oa kamore ke 1015Ω•cm) le ho hanyetsa ho senyeha ha motlakase (matla a ho thibela mocheso ke 15kV/mm).
5. Ho tsitsa ha lik'hemik'hale hantle. Ha e arabele le sulfuric acid, hydrochloric acid, nitric acid le hydrofluoric acid.
6. Ho hanyetsa ho bola ha ditshila mochesong o phahameng. E ka hanela ho bola ha ditshila tse qhibilihisitsweng tse kang Be, Sr, Ni, Al, V, Ta, Mn, Fe le Co hamolemo.
Ka hona, li-ceramic tsa alumina li sebelisoa haholo masimong a indasteri ea sejoale-joale. Li sebelisoa haholo indastering ea tlhahiso ea semiconductor, indastering ea lisebelisoa tsa elektroniki, indastering ea mechini, tikolohong ea mocheso o phahameng, indastering ea lik'hemik'hale, indastering ea mabone, indastering ea masela le masimong a mang.
Alumina ke thepa ea ceramic e sebelisoang haholo lits'ebetsong tse latelang:
✔ di-insulator tsa motlakase, dikarolo tse hanelang mafome bakeng sa di-laser tsa kgase, bakeng sa disebediswa tsa ho sebetsana le di-semiconductor (tse kang chuck, end effector, seal ring)
✔ di-insulator tsa motlakase bakeng sa diphaephe tsa dielektrone.
✔ dikarolo tsa sebopeho bakeng sa disebediswa tse nang le vacuum e ngata le cryogenic, disebediswa tsa mahlasedi a nyutlelie, disebediswa tse sebediswang mochesong o phahameng.
✔ dikarolo tse thibelang mafome, piston bakeng sa dipompo, di-valve le ditsamaiso tsa ho lekanya, ho nka di-valve tsa madi ho nka sampole.
✔ lipeipi tsa thermocouple, li-insulator tsa motlakase, mecha ea ho sila, litataiso tsa khoele.
Nako ea poso: Phupu-14-2023