Vim li cas cerium oxide tuaj yeem ua lub luag haujlwm tseem ceeb hauv kev tsav tsheb?

Cerium oxideplays lub luag haujlwm tseem ceeb hauv kev ua lag luam tsheb feem ntau vim nws muaj lub cev thiab tshuaj lom neeg tshwj xeeb.
Hais txog cov khoom siv tshuaj, cerium oxide yog lub ntiaj teb tsis tshua muaj oxide nrog cov khoom zoo heev redox. Hauv kev kho mob ntawm lub tsheb tso pa, nws tuaj yeem ua haujlwm tseem ceeb ntawm cov catalysts. Lub tsheb tso tawm muaj cov pa phem xws li carbon monoxide (CO), hydrocarbons (HC), thiab nitrogen oxides (NOx). Cerium oxide tuaj yeem koom nrog cov tshuaj tiv thaiv redox, txhawb kev oxidation ntawm carbon monoxide thiab hydrocarbons, hloov mus rau carbon dioxide (CO₂) thiab dej (H₂O), thiab tib lub sij hawm txhawb kev txo cov nitrogen oxides kom txo tau cov pa phem. Piv txwv li, hauv peb-txoj kev catalysts (TWC),cerium oxidetuaj yeem khaws thiab tso pa oxygen. Thaum lub cav ua haujlwm nyob rau hauv kev nplua nuj-hlwb (qhov sib piv ntawm huab cua-roj tsawg dua li qhov sib piv stoichiometric), ntau cov pa roj carbon monoxide thiab hydrocarbons yuav raug tsim. Lub sijhawm no, cerium oxide tuaj yeem tso cov pa uas khaws cia los pab oxidize cov pa phem no; Thaum nyob rau hauv ntshiv-hluav taws kub (cov huab cua-roj piv piv yog ntau dua li stoichiometric piv), cerium oxide tuaj yeem nqus cov pa ntau dhau, yog li ua kom cov catalyst nyob rau hauv lub xeev ua haujlwm tau zoo txhua lub sijhawm thiab ua kom cov pa tawm tau zoo.
Nyob rau hauv cov nqe lus ntawm lub cev muaj zog, cerium oxide muaj siab hardness thiab zoo hnav tsis kam. Hauv cov txheej txheem polishing thiab sib tsoo ntawm lub tsheb, cerium oxide tuaj yeem siv los ua abrasive. Piv txwv li, nyob rau hauv polishing ntawm tsheb xim nto, polishing agents uas muaj cerium oxide yuav tshem tawm me me khawb thiab flaws ntawm cov xim nto, ua rau cov xim nto smoother thiab flatter. Qhov no yog vim hais tias cerium oxide tuaj yeem ua rau qhov tsis sib xws ntawm cov xim pleev xim los ntawm kev sib tsoo lub cev, thiab tib lub sijhawm, vim nws qhov nyuaj me ntsis, nws yuav tsis ua rau muaj kev puas tsuaj ntau rau cov xim pleev xim.
Ntxiv rau,cerium oxidekuj tuaj yeem siv rau hauv cov txheej txheem ultraviolet-pov thawj ntawm lub tsheb iav. Nws tuaj yeem nqus tau thiab cuam tshuam txog cov kab hluav taws xob ultraviolet, txo qhov kev puas tsuaj ntawm cov hluav taws xob ultraviolet rau cov neeg caij tsheb thiab cov khoom siv kho kom zoo nkauj sab hauv hauv lub tsheb. Ultraviolet rays tuaj yeem ua rau cov laus thiab fading ntawm cov ntaub ntawv xws li cov khoom yas thiab cov ntaub hauv lub tsheb, thiab cov coatings uas muaj cerium oxide tuaj yeem thaiv cov kab hluav taws xob ultraviolet, ua kom lub neej ntev ntawm cov khoom siv kho kom zoo nkauj sab hauv, thiab tseem muaj kev tiv thaiv zoo dua rau cov neeg caij tsheb. Cerium oxide kuj tseem siv rau hauv cov txheej txheem ceramic ntawm lub tsheb cav. Nws tuaj yeem txhim kho qhov kub thiab txias tsis kam thiab corrosion kuj ntawm cov coatings, txhim kho cov kev pab cuam lub neej thiab kev ua tau zoo ntawm cov cav tov. Piv txwv li, ntxiv cerium oxide rau cov ceramic coatings rau ntawm qhov chaw ntawm cov khoom xws li pistons thiab li qub tuaj yeem tiv taus qhov scouring thiab corrosion ntawm high-temperature combustion gases, kom ntseeg tau tias kev ua haujlwm ruaj khov ntawm lub cav.