Ufa Wopukuta wa Cerium Oxide vs. Aluminium Oxide: Kusanthula Koyerekeza Konse
Mu makina olondola m'mafakitale a magalasi ndi optics, ufa wopukuta ndi chinthu chofunikira chomwe chimatsimikizira mtundu wa pamwamba, kuwala, ndi kuchuluka kwa zolakwika.Cerium oxide (CeO₂)ndi aluminiyamu oxide (Al₂O₃) ndi zinthu ziwiri zomwe zimagwiritsidwa ntchito kwambiri popukuta, koma zimasiyana kwambiri mu kapangidwe ka zinthu, njira yopukuta, kuuma, kugwira ntchito bwino, komanso zotsatira zake zomaliza pamwamba. Chifukwa chake, kusankha bwino ufa wopukuta sikumangokhudza momwe zinthu zimagwirira ntchito komanso kumakhudza mwachindunji zokolola ndi mtengo wonse wa chinthu chomalizidwa. Cerium oxide, monga chinthu chosowa chapadziko lapansi, ili ndi mtundu wapadera wa Ce³⁺/Ce⁴⁺ reversible valence state, zomwe zimapangitsa kuti ipange mankhwala pang'ono ikakhudzana ndi silicates mugalasi. Gawo lofewa kwambiri lofewa limapangidwa pamwamba pagalasi panthawi yopukuta, lomwe limachotsedwa pang'onopang'ono ndi ntchito yophatikizana ya polishing pad ndi kayendedwe ka makina. Njira iyi yochotsera "chemical + mechanical" composite imadziwika kuti CMP (Chemical Mechanical Polishing), yomwe ndi chifukwa chachikulu chomwe cerium oxide polishing imagwirira ntchito mwachangu, moyenera, komanso imapanga zolakwika zochepa kwambiri pamwamba. Mosiyana ndi zimenezi, alumina ndi makina okhwima omwe ali ndi Mohs hardness ya 9, yachiwiri pambuyo pa corundum ndi diamondi. Njira yopukutira imadalira kwambiri m'mbali zakuthwa, kuuma, ndi mphamvu yakunja ya tinthu tating'onoting'ono, zomwe zikuyimira kupukutira kwa makina kopanda gawo lofewa ndi mankhwala. Chifukwa chake, njira yochotsera imakhala yolimba kwambiri, zomwe zimapangitsa kuti pakhale kukanda pang'ono kwambiri, makamaka popukuta galasi lowonekera.
Ponena za kuuma kwa zinthu, cerium oxide ili ndi kuuma kwa Mohs pafupifupi 6, pafupi ndi kwa galasi, zomwe zimapangitsa kuti ikhale yofewa ikakhudzana ndi zinthu zowonekera bwino komanso pafupifupi kuchotsa mikwingwirima yozama. Alumina, yokhala ndi kuuma kwa 9, ndi yoyenera pazinthu zolimba kwambiri monga zitsulo, zoumba, ndi kupukuta koyamba kwa safiro. Komabe, ikagwiritsidwa ntchito pagalasi, kupanikizika kuyenera kuchepetsedwa kuti kupewe kupangitsa kuti matte asakhale ndi mikwingwirima, kukanda, kapena ngakhale ming'alu yaying'ono, zomwe zimapangitsa kuti kuwonekera kuchepe. Pamalo owoneka bwino, alumina sakhala yokhazikika kwambiri kuposa cerium oxide. Ponena za kukula kwa tinthu, zonse ziwiri zimatha kufika pa 0.3–3 μm, koma tinthu ta cerium oxide nthawi zambiri timakhala tozungulira kwambiri ndipo timakhala ndi kufalikira kwa tinthu tating'onoting'ono, zomwe zimapangitsa kuti zikhale zoyenera kupukuta bwino; tinthu ta alumina tili ndi m'mbali zakuthwa, zomwe zimapangitsa kuti zikhale zoyenera kudula mwachangu. Ponena za kuyimitsidwa,cerium oxide, ikasinthidwa pamwamba, imakhala ndi kuthekera kobalalika bwino kwambiri mu slurry yopukutira, siimakonda kusonkhana kapena kusungunuka, ndipo ndi yoyenera kwambiri pokonza nthawi yayitali. Koma alumina imakhala ndi kuchuluka kwakukulu ndipo imakhazikika mwachangu, imafuna kusakaniza kosalekeza, zomwe zimapangitsa kuti isagwiritsidwe ntchito pazingwe zopangira zokha.
Poyerekeza mphamvu zawo zopukutira, cerium oxide, chifukwa cha kukhalapo kwa gawo la chemical reaction, nthawi zambiri imapeza mphamvu yochotsera zinthu (MRR) yapamwamba kwambiri pamene ikusunga mawonekedwe abwino pamwamba, kusonyeza kukhazikika makamaka pakukonza magalasi akuluakulu, magalasi owonera, ndi ma cover plates a foni yam'manja mosalekeza. Ngakhale alumina ili ndi kuuma kwakukulu komanso liwiro lochotsa mwachangu, imadalira kwambiri mphamvu yakunja ndi ngodya yodulira, ili ndi zenera lopapatiza, ndipo imakanda ngakhale ndi kupanikizika kwakukulu pang'ono. Chifukwa chake, popanga zinthu zambiri, nthawi zambiri imakhala yosakhazikika kuposa cerium oxide, zomwe zimapangitsa kuti ikhale yogwira ntchito yochepa. Kusiyana kwa khalidwe la pamwamba kumaonekera kwambiri.Cerium oxideimatha kukhala ndi malo owoneka bwino okhala ndi Ra < 1 nm, kuwala kwambiri, komanso kusakhala ndi matte, zomwe zimapangitsa kuti ikhale chisankho chabwino kwambiri cha magalasi, zida za laser, mawindo a safiro, ndi magalasi apamwamba. Alumina, chifukwa cha kupukutira kwa makina, nthawi zambiri imapanga mikwingwirima yosiyanasiyana, zigawo zopsinjika, ndi kuwonongeka kwa pansi pa nthaka, zomwe zimapangitsa kuti kuwala kuchepe kwambiri. Pazinthu monga kupukuta komaliza kwa magalasi a foni yam'manja, kupukuta bwino makamera, ndi kupukuta mawindo a semiconductor optical, alumina siyokwanira ndipo ingagwiritsidwe ntchito kokha popukuta koyambirira.
Kuchokera pakuwona momwe zinthu zikuyenderana, cerium oxide ndi yosinthika mosavuta, yosakhudzidwa kwambiri ndi zinthu monga pH, polishing pad, kupanikizika, ndi liwiro, komanso yosavuta kusintha. Komabe, Alumina imakhudzidwa kwambiri ndi kuthamanga kwa kupanikizika ndi liwiro lozungulira; kusalamulira bwino pang'ono kungayambitse kukanda kapena malo osafanana, zomwe zimapangitsa kuti zenera lake lopangira likhale lochepa. Kuphatikiza apo, alumina imakhazikika mwachangu, zomwe zimapangitsa kuti ndalama zokonzera zikhale zokwera komanso zovuta kwambiri pakuwongolera njira. Ponena za mtengo, alumina ndi yotsika mtengo pa unit, pomwe cerium oxide, ngati chinthu chosowa kwambiri padziko lapansi, ndi yokwera mtengo pang'ono. Komabe, makampani opanga magalasi amayang'ana kwambiri pa mtengo wonse wa umwini (TCO), mwachitsanzo, magwiridwe antchito + zokolola + zogwiritsidwa ntchito + kutayika kwa ntchito + kukonzanso. Mapeto omaliza nthawi zambiri ndi awa: pomwe alumina ndi yotsika mtengo, kuchuluka kwake kokanda ndi kukonzanso kumakhala kokwera; pomwe cerium oxide ndi yokwera mtengo pa unit, imapereka magwiridwe antchito apamwamba, zolakwika zochepa, komanso zokolola zambiri, zomwe zimapangitsa kuti mtengo wonse ukhale wotsika kwambiri. Chifukwa chake, ma optics, zamagetsi, ndi mafakitale agalasi omanga nyumba pafupifupi padziko lonse lapansi amasankha cerium oxide ngati ufa wawo waukulu wopukuta.
Ponena za kuchuluka kwa ntchito,cerium oxideIli ndi ubwino waukulu pafupifupi m'magawo onse omwe amafunikira kuwonekera bwino, kufanana, komanso kuwala kwa optical-grade, kuphatikiza magalasi ophimba mafoni, magalasi a kamera, makamera agalimoto, zida zowunikira za laser, masilaidi a maikulosikopu, galasi la quartz, mawindo a safiro, ndi kupukuta bwino kwa galasi lomanga. Mosiyana ndi zimenezi, alumina ndi yoyenera zitsulo zosawoneka bwino, zoumba, chitsulo chosapanga dzimbiri, nkhungu, magalasi achitsulo, ndi kupukutira kosakhazikika kwa safiro, komwe kumafunika mphamvu zambiri zodulira. Mwachidule: sankhani cerium oxide pazinthu zowonekera bwino, ndi alumina pazinthu zolimba; sankhani cerium oxide kuti mugwiritse ntchito pamwamba, ndi alumina kuti mugwiritse ntchito mwachangu.
Ponseponse, cerium oxide, yokhala ndi njira yake yapadera ya CMP, zenera lokhazikika, magwiridwe antchito apamwamba, komanso malo apamwamba, yakhala chinthu chosasinthika chopukutira m'mafakitale a magalasi ndi optics. Ngakhale alumina ndi yotsika mtengo komanso yolimba kwambiri, ndiyoyenera kwambiri kupukutira zinthu zolimba kwambiri, zosawoneka bwino monga zitsulo ndi zoumba. Kwa makampani omwe akufuna mizere yayikulu komanso yokhazikika yopanga komanso kuchuluka kochepa kwa zolakwika, alumina siyokwanira kukwaniritsa zosowa zomaliza za kupukutira kwa galasi lowonekera, pomwe cerium oxide ndiye yankho labwino kwambiri pakumaliza pamwamba pa zinthu zapamwamba.