Zinthu Zopukutira Zamatsenga

  Mu dziko la kupanga zinthu molondola komanso kumaliza pamwamba,cerium oxideUfa wopukutira waonekera ngati chinthu chosintha masewera. Kapangidwe kake kapadera kamapangitsa kuti ukhale wofunikira kwambiri pa ntchito zosiyanasiyana zopukutira, kuyambira pamwamba pa magalasi owoneka bwino mpaka ma wafer apamwamba kwambiri popanga ma semiconductor.

  Kapangidwe ka kupukuta kwa cerium oxide ndi kusakaniza kosangalatsa kwa njira zamakemikolo ndi zamakanika.cerium oxide (CEO₂) imagwiritsa ntchito mikhalidwe yosinthasintha ya valence ya chinthu cha cerium. Pakakhala madzi panthawi yopukuta, pamwamba pa zinthu monga galasi (zopangidwa ndi silika, SiO2)₂) imakhala hydroxylated.CEO₂Kenako imakumana ndi pamwamba pa silika ya hydroxylated. Choyamba imapanga bond ya Ce – O – Si. Chifukwa cha kapangidwe ka hydrolytic ka pamwamba pa galasi, izi zimasandukanso Ce – O – Si(OH)₃mgwirizano.

   Mwaukadaulo, zolimba, zosalalacerium oxideTinthu tating'onoting'ono timagwira ntchito ngati zinthu zazing'ono zonyamulira. Timachotsa zinthu zosaoneka bwino kwambiri pamwamba pa chinthucho. Pamene chopukutira chikuyenda pamwamba pake mopanikizika,cerium oxideTinthu tating'onoting'ono timaphwanya mfundo zapamwamba, pang'onopang'ono n'kuphwanya pamwamba. Mphamvu ya makina imathandizanso kuswa ma bond a Si – O – Si mu kapangidwe ka galasi, zomwe zimathandiza kuchotsa zinthuzo ngati zidutswa zazing'ono.Chimodzi mwa zinthu zodabwitsa zacerium oxidekupukuta ndi luso lake lodziwongolera lokha - kusintha liwiro la kupukuta. Pamene pamwamba pa zinthuzo pali poyipa,cerium oxideTinthu tating'onoting'ono timachotsa zinthu mwachangu kwambiri. Pamene pamwamba pake pakukhala posalala, liwiro la kupukuta limatha kusinthidwa, ndipo nthawi zina, limafika pamlingo wa "kudziletsa". Izi zimachitika chifukwa cha kuyanjana pakati pa cerium oxide, polishing pad, ndi zowonjezera mu slurry yopukuta. Zowonjezera zimatha kusintha kapangidwe ka pamwamba ndi kumamatirana pakati pacerium oxidetinthu tating'onoting'ono ndi zinthu, zomwe zimathandiza kwambiri poyendetsa bwino ntchito yopukuta.