I-alumina ceramic engagugiiyinto yobumba yezimboni ethuthukisiwe eyakhiwe ngokuyinhloko nge-alumina emsulwa kakhulu (Al₂O₃). Isibe yinto ebalulekile yokubhekana nokuguguleka okukhulu, ukugqwala, kanye nezimo zokushisa okuphezulu ngenxa yobulukhuni bayo obungavamile, ukumelana nokuguguleka, kanye nokuqina kwamakhemikhali. Uma kuqhathaniswa nezinto zendabuko ezingagugi zensimbi, yandisa kakhulu impilo yesevisi yemishini futhi inciphisa imvamisa yokulungisa kanye nezindleko emikhakheni eminingi yezimboni, isebenza njengesixazululo esibalulekile sezimboni ezisukela kumandla kanye nezinsimbi kuya ekukhiqizeni okuphezulu.
Ukusebenza kwayo okumangalisayo kusekelwe kudatha eqondile yomzimba neyamakhemikhali. Ubulukhuni be-Rockwell (HRA) be-alumina ceramic bungafinyelela ku-80-90, ngamandla okucindezela adlula i-850 MPa. Ukuhlolwa kochwepheshe kubonisa ukuthi ukumelana kwayo nokuguguleka kuphindwe izikhathi ezingu-266 kunensimbi ye-manganese kanye nezikhathi ezingu-171.5 kunensimbi ephezulu ye-chromium. Ngokuphathelene nokumelana nokushisa, izinga lokushisa layo lenkonzo yesikhathi eside lingafinyelela ku-300°C, futhi lingamelana nokugqwala kwe-acid ne-alkali ngaphakathi kobubanzi be-pH obungu-3 kuya ku-12. Lezi zakhiwo ziyenza isebenze ngokuzinzile ezindaweni ezinomthelela omkhulu, ukuguguleka okuphezulu, kanye nokugqwala, isibonelo, ukwandisa impilo yenkonzo yamapayipi ahambisa i-powder yamalahle izikhathi ezingaphezu kwe-10.
Ukusebenza kwe-alumina ceramic engagugi kuzuza ngokulawulwa okunembile kwayo yonke inqubo kusukela ezintweni zokusetshenziswa kuya ekushiseni. Okokuqala, i-alumina powder eluhlaza idlula ekugayweni okuhle kakhulu, kanti usayizi wezinhlayiya uvame ukulawulwa ngaphansi kwe-1 micron, okuqinisekisa ukuhlanzeka okuphezulu kanye nokusatshalaliswa kosayizi wezinhlayiya ezifanayo. Izinqubo zokuqala zokwakha zifaka phakathi ukucindezela okomile kanye nokucindezela kwe-isostatic, lokhu kokugcina kunikeza ubuningi obufanayo emzimbeni oluhlaza. Ekugcineni, umzimba oluhlaza ushiswa cishe ku-1700°C, kwakha isakhiwo esiqinile se-microcrystalline, kanye nobuningi bezinto ezifika ku-95%. Ukwakheka okuhlanganisiwe, njengokwengeza i-zirconia (ZrO₂), kungathuthukisa kakhulu ukumelana kwayo nokuqina kwayo.
Lokhu kusetshenziswa kabanzi emikhakheni eminingi yezimboni. Ezimbonini zamandla nokuvikela imvelo, kusetshenziswa emipayipini yempuphu yamalahle yezitshalo zamandla okushisa, kanye nasezihlotsheni kanye nama-cyclone cones ezitshalo zesamente, okwandisa impilo yesevisi yemishini ngezikhathi ezi-3 kuya kwezi-5. Ezimbonini zensimbi nezezimayini, ama-ceramic liners afakwe emipayipini yokufaka amalahle esithandweni somlilo kanye namapayipi okususa uthuli amelana ngempumelelo nemidiya ekhubaza kakhulu njengempuphu yensimbi, okunciphisa izindleko zokugcinwa konyaka ngamaphesenti angama-60. Ngaphezu kwalokho, ubumsulwa obuphezulu kakhulu (isb., 99.7%) be-alumina ceramics nabo busetshenziswa emikhakheni yokukhiqiza ephezulu njenge-semiconductor wafer polishing.
Isikhathi sokuthunyelwe: Disemba 19-2025