Izinto Zokupholisha Ezinomlingo

  Ezweni lokukhiqiza ngokunemba kanye nokuqedela ubuso,i-cerium oxideImpuphu yokupholisha ivele njengento eshintsha umdlalo. Izakhiwo zayo eziyingqayizivele ziyenza ibe yingxenye ebalulekile ezinhlotsheni eziningi zezicelo zokupholisha, kusukela ezindaweni ezithambile zamalensi optical kuya kuma-wafers obuchwepheshe obuphezulu ekukhiqizeni ama-semiconductor.

  Indlela yokupholisha ye-cerium oxide iyinhlanganisela ethakazelisayo yezinqubo zamakhemikhali nezemishini. Ngokwekhemikhali,i-cerium oxide (I-CeO₂) isebenzisa izimo ze-valence eziguquguqukayo ze-cerium element. Lapho kukhona amanzi ngesikhathi senqubo yokupholisha, ubuso bezinto ezifana nengilazi (ikakhulukazi eyakhiwe nge-silica, i-SiO2₂) iba yi-hydroxylated.I-CeO₂bese iphendula ngobuso be-silica obuyi-hydroxylated. Okokuqala yakha isibopho se-Ce – O – Si. Ngenxa yemvelo ye-hydrolytic yobuso bengilazi, lokhu kuqhubeka nokuguquka kube yi-Ce – O – Si(OH)₃isibopho.

   Ngokwemishini, okuqinile, okucolekilei-cerium oxideIzinhlayiya zisebenza njengezinto ezincane ezisusa ukungcola. Zisusa ngokomzimba ukungalungi okuncane ebusweni bezinto. Njengoba iphedi yokupholisha ihamba phezu kobuso ngaphansi kwengcindezi,i-cerium oxideIzinhlayiya zigaya phansi amaphuzu aphezulu, kancane kancane zisicaba ubuso. Amandla omshini nawo adlala indima ekuphuleni izibopho ze-Si – O – Si esakhiweni sengilazi, okwenza kube lula ukususwa kwezinto ngendlela yezingcezu ezincane.Esinye sezici eziphawulekayo ze-i-cerium oxideukupholisha kuyikhono layo lokuzilungisa – ukulungisa izinga lokupholisha. Uma ubuso bezinto buqinile,i-cerium oxideIzinhlayiya zisusa izinto ngamandla ngesivinini esiphezulu. Njengoba ubuso buba bushelelezi, izinga lokupholisha lingalungiswa, futhi kwezinye izimo, lifinyelele ngisho nesimo "sokuzimisa". Lokhu kungenxa yokusebenzisana phakathi kwe-cerium oxide, i-polishing pad, kanye nezengezo eziku-slurry yokupholisha. Izithasiselo zingashintsha i-chemistry yendawo kanye nokunamathelana phakathi kwe-i-cerium oxideizinhlayiya kanye nezinto, zilawula ngempumelelo inqubo yokupholisha.