Umgubo wokuCoca iCerium Oxide vs. iAluminium Oxide: Uhlalutyo oluQhelekileyo lokuthelekisa
Kwimisebenzi yokulungisa ngokuchanekileyo kwimizi-mveliso yeglasi kunye ne-optics, i-polish powder yinto ebalulekileyo emisela umgangatho wokugqibela womphezulu, ukukhanya, kunye nesantya seziphene.I-Cerium oxide (CeO₂)kunye ne-aluminium oxide (Al₂O₃) zezona zinto zimbini zisetyenziswa kakhulu ekupolisheni, kodwa zahlukile kakhulu kwisakhiwo sezinto, indlela yokupolisha, ubulukhuni, ukusebenza kakuhle, kunye nesiphumo sokugqibela somphezulu. Ke ngoko, ukhetho oluchanekileyo lwepowder yokupolisha aluchaphazeli nje kuphela ukusebenza kakuhle kokucubungula kodwa luchaphazela ngokuthe ngqo isivuno kunye neendleko zizonke zemveliso egqityiweyo. I-Cerium oxide, njengezinto ezinqabileyo zomhlaba, inesimo se-valence esiguqukayo se-Ce³⁺/Ce⁴⁺, esivumela ukuba ivelise impendulo encinci yekhemikhali xa idibana ne-silicates kwiglasi. Umaleko wempendulo yokuthambisa obhityileyo kakhulu wenziwa kumphezulu weglasi ngexesha lokupolisha, osuswa ngobunono ngesenzo esidibeneyo se-polishing pad kunye nentshukumo yoomatshini. Le ndlela yokususa i-composite "chemical + mechanical" yaziwa ngokuba yi-CMP (Chemical Mechanical Polishing), esona sizathu siphambili sokuba i-cerium oxide polishing ikhawuleze, isebenze kakuhle, kwaye ivelise iziphene eziphantsi kakhulu zomphezulu. Ngokwahlukileyo koko, i-alumina yi-mechanical abrasive yendabuko enobunzima be-Mohs obuyi-9, yesibini emva kwe-corundum kunye nedayimani. Inkqubo yokupolisha ixhomekeke ngokupheleleyo kwiikona ezibukhali, ubulukhuni, kunye namandla angaphandle amasuntswana, amele ukugaywa okuqhelekileyo koomatshini ngaphandle komaleko othambileyo weekhemikhali. Ke ngoko, inkqubo yokususa inzima, ibangela ukukrweleka okunzulu kancinci, ngakumbi okubonakalayo ekupoliseni iglasi ecacileyo.
Ngokuphathelele ubunzima bezinto, i-cerium oxide inobunzima be-Mohs obumalunga ne-6, kufutshane nobo beglasi, nto leyo eyenza ukuba ithambe ngakumbi xa idibana nezinto ezibonakalayo kwaye iphantse isuse imikrwelo enzulu. I-Alumina, enobunzima be-9, ifanelekile kwizinto ezinobunzima obuphezulu ezifana neentsimbi, iiseramikhi, kunye nokupholishwa kokuqala kwesafire. Nangona kunjalo, xa isetyenziswa kwiglasi, uxinzelelo kufuneka luncitshiswe ukuze kuthintelwe ukubangela ukugqitywa kwe-matte, imikrwelo, okanye imikrwelo emincinci, nto leyo ekhokelela ekunciphiseni ukucaca. Kwiindawo ezikhanyayo, i-alumina ayizinzanga kakhulu kune-cerium oxide. Ngokuphathelele ubungakanani bezinto ezincinci, zombini zinokufikelela kuluhlu lwe-0.3–3 μm, kodwa izinto ezincinci ze-cerium oxide zihlala zijikelezile kwaye zinomlinganiselo omncinci wezinto ezincinci, nto leyo ezenza zifaneleke ngakumbi ukupholishwa kakuhle; izinto ezincinci ze-alumina zinemiphetho ebukhali, nto leyo eyenza zifaneleke ngakumbi ukusika ngokukhawuleza. Ngokuphathelele ukumiswa,i-cerium oxide, emva kokuguqulwa komphezulu, igcina ukusasazeka okuhle kakhulu kwi-slurry yokupolisha, ayithambekeli ekuhlanganisweni okanye ekuthuthweni, kwaye ifanelekile kakhulu ekucutshungulweni okuqhubekayo kwexesha elide. Kwelinye icala, i-Alumina inoxinano olukhulu kwaye ihlala ngokukhawuleza, ifuna ukuxutywa okuqhubekayo, okwenza ukuba ingafanelekanga kwimigca yemveliso ezenzekelayo.
Xa ithelekiswa nokusebenza kakuhle kokupholisha, i-cerium oxide, ngenxa yokubakho komaleko we-chemical reaction, idla ngokufikelela kwizinga eliphezulu lokususa izinto (MRR) ngelixa igcina umgangatho ongcono womphezulu, ibonisa uzinzo ngakumbi ekuqhubekeni kokucubungula iglasi enkulu, iilensi ze-optical, kunye neepleyiti zokugubungela iifowuni eziphathwayo. Nangona i-alumina inobunzima obuphezulu kwaye ngokwethiyori ikhawuleza ukususwa, ixhomekeke kakhulu kumandla angaphandle kunye ne-engile yokusika, inefestile yenkqubo emxinwa, kwaye isengozini yokukrweleka nokuba iphantsi kancinci uxinzelelo. Ke ngoko, kwimveliso yokwenyani yobuninzi, idla ngokungazinzi kune-cerium oxide, nto leyo ebangela ukusebenza okuphantsi. Umahluko kumgangatho womphezulu ubonakala ngakumbi.I-cerium oxideinokufikelela kwiindawo ezikumgangatho we-optical nge-Ra < 1 nm, ukukhanya okuphezulu, kwaye akukho kugqitywa kwe-matte, okwenza kube lolona khetho lukhethwayo kwiilensi, izinto ze-laser optical, iifestile ze-sapphire, kunye neglasi ephezulu. I-Alumina, ngenxa yokusila ngoomatshini okucocekileyo, idla ngokuvelisa amanqanaba ahlukeneyo emikrwelo, iileya zoxinzelelo, kunye nomonakalo ongaphantsi komhlaba, okubangela ukwehla okukhulu kokukhanya. Kwiinkqubo ezinje ngokupholisha kokugqibela iglasi yefowuni ephathwayo, ukupholisha kakuhle iikhamera, kunye nokupholisha iifestile ze-semiconductor optical, i-alumina ayanelanga kwaye ingasetyenziselwa kuphela ukupholisha okurhabaxa kokuqala.
Ngokwembono yokuhambelana kwenkqubo, i-cerium oxide iyakwazi ukuguquguquka, ayichaphazeleki kakhulu kwiiparameter ezifana ne-pH, i-polishing pad, uxinzelelo, kunye nesantya, kwaye kulula ukuyilungisa. Kwelinye icala, i-Alumina inovelwano kakhulu kwi-pressure kunye nesantya sokujikeleza; ulawulo oluncinci olungalunganga lunokubangela imikrwelo okanye iindawo ezingalinganiyo, nto leyo enciphisa i-processing window yayo. Ngaphezu koko, i-alumina ihlala ngokukhawuleza, nto leyo ekhokelela kwiindleko eziphezulu zokulungisa kunye nobunzima obukhulu ekulawulweni kwenkqubo. Ngokuphathelele iindleko, i-alumina ixabisa kancinci ngeyunithi nganye, ngelixa i-cerium oxide, njengezinto ezinqabileyo zomhlaba, ibiza kancinci. Nangona kunjalo, ishishini lokucubungula iglasi ligxila ngakumbi kwixabiso elipheleleyo lobunini (TCO), oko kukuthi, ukusebenza kakuhle + isivuno + izinto ezisetyenziswayo + ilahleko zomsebenzi + umsebenzi. Isiphelo sokugqibela sidla ngokuba: ngelixa i-alumina ixabisa kancinci, amazinga ayo okukrwela kunye nokulungiswa kwakhona aphezulu; ngelixa i-cerium oxide ibiza kakhulu ngeyunithi nganye, inikezela ukusebenza kakuhle okuphezulu, iziphene eziphantsi, kunye nesivuno esiphezulu, nto leyo ebangela iindleko eziphantsi kakhulu. Ke ngoko, ii-optics, ii-electronics zabathengi, kunye namashishini eglasi yokwakha phantse jikelele akhetha i-cerium oxide njengomgubo wabo ophambili wokupolisha.
Ngokuphathelele umda wesicelo,i-cerium oxideInenzuzo enkulu phantse kuzo zonke iinkalo ezifuna ukukhanya, ukufana, kunye nokukhanya okubonakalayo, kubandakanya iglasi yesigqubuthelo sefowuni ephathwayo, iilensi zekhamera, iikhamera zeemoto, izinto ze-laser optical, iislayidi zemicroscope, iglasi ye-quartz, iifestile zesafire, kunye nokupholishwa kakuhle kweglasi yokwakha. Ngokwahlukileyo koko, i-alumina ifanelekile kwiintsimbi ezingacacanga, iiseramikhi, intsimbi engatyiwayo, iimolds, izibuko zesinyithi, kunye nokusila okurhabaxa kwesafire, apho kufuneka amandla aphezulu okusika. Ngamafutshane: khetha i-cerium oxide kwizixhobo ezicacileyo, kunye ne-alumina kwizixhobo eziqinileyo; khetha i-cerium oxide kwimigangatho yomphezulu, kunye ne-alumina kwisantya sokusika.
Lilonke, i-cerium oxide, ene-CMP mechanism yayo eyahlukileyo, ifestile yenkqubo ezinzileyo, ukusebenza kakuhle okuphezulu, kunye nomphezulu osemgangathweni ophezulu, iye yaba yinto yokupholisha engenakutshintshwa kwimizi-mveliso yeglasi kunye ne-optics. Nangona i-alumina ibiza kancinci kwaye ilukhuni kakhulu, ifanelekile ngakumbi ukupholisha izinto ezinobunzima obuphezulu, ezingabonakaliyo njengeentsimbi kunye neeseramikhi. Kwiinkampani ezifuna imigca yemveliso emikhulu, ezinzileyo kunye namazinga aphantsi eziphene, i-alumina ayanelanga kwiimfuno zokugqibela zokupholisha zeglasi ecacileyo, ngelixa i-cerium oxide isisisombululo esilungileyo sokugqiba umphezulu wemveliso ephezulu.