Alumina, cyangwa Aluminium Oxide, ishobora gukorwa mu buryo butandukanye. Ingano zisanzwe zikoreshwa mu nganda zigezweho ni 99.5% kugeza 99.9% hamwe n'inyongeramusaruro zigenewe kongera imiterere. Uburyo butandukanye bwo gutunganya ceramic bushobora gukoreshwa harimo no gukora cyangwa gukora imiterere y'urushundura kugira ngo hakorwe ingano n'imiterere itandukanye y'ibice bigize ceramic.
Ibumba rya Al2O3 rifite ibyiza bikurikira:
1. Ubukana bwinshi (ubukana bwa MOHS ni 9) kandi bushobora kwangirika neza.
2. Ingufu nziza za mekanike. Ingufu zayo zo kugonda zishobora kugera kuri 300 ~ 500MPa.
3. Irwanya ubushyuhe cyane. Ubushyuhe bwayo buhoraho bushobora kugera kuri 1000°C.
4. Ubushobozi bwo gukingira cyane n'ubushobozi bwiza bwo gukingira amashanyarazi. Cyane cyane hamwe n'ubushyuhe bwinshi bwo gukingira (ubushyuhe bw'icyumba ni 1015Ω •cm) hamwe n'ubudahangarwa bwo kwangirika k'amashanyarazi (imbaraga zo gukingira ni 15kV/mm).
5. Gukomera neza mu binyabutabire. Ntibikorana na aside sulfuriki, aside hydrochloric, aside nitrike na aside hydrofluoric.
6. Kurwanya ingese mu bushyuhe bwinshi. Bishobora kurwanya isuri y'ibyuma bishongeshejwe nka Be, Sr, Ni, Al, V, Ta, Mn, Fe na Co.
Bityo, alumina ceramics zikoreshwa cyane mu nganda zigezweho. Zikoreshwa cyane cyane mu nganda zikora ibikoresho bya semiconductor, mu nganda zikora ibikoresho by'ikoranabuhanga, mu nganda zikora imashini, mu bidukikije bishyuha cyane, mu nganda zikora imiti, mu nganda zikora umucyo, mu nganda zikora imyenda n'izindi.
Alumina ni ibikoresho bya ceramic bikoreshwa cyane mu bikorwa bikurikira:
✔ ibikoresho bikingira amashanyarazi, ibikoresho birwanya ingese bya laser za gaze, ibikoresho byo gutunganya semiconductor (nk'ikinyugunyugu, impeta, impeta yo gufunga)
✔ ibikoresho by'amashanyarazi bikingira imiyoboro ya elegitoroniki.
✔ ibice by'imiterere y'ibikoresho bifite umwuka mwinshi n'ibikoresho bihumanya ikirere, ibikoresho bifite imirasire ya kirimbuzi, ibikoresho bikoreshwa ku bushyuhe bwinshi.
✔ Ibice birwanya ingese, piston yo gukoresha pompe, valves na sisitemu zo gupima, valves z'amaraso zo gupima.
✔ imiyoboro ya thermocouple, ibyuma bikingira amashanyarazi, ibikoresho byo gusya, n'imigozi.
Igihe cyo kohereza: 14 Nyakanga-2023