Cerium oxide, Molecular formula yogCeO 2, Suav alias:Cerium (IV) oxideMolecular Luj: 172.11500. Nws tuaj yeem siv los ua cov khoom siv polishing, catalyst, catalyst carrier (tus pab), ultraviolet absorber, roj cell electrolyte, automotive exhaust absorber, Electroceramics, thiab lwm yam.
Cov cuab yeej tshuaj
Ntawm qhov kub ntawm 2000 ℃ thiab lub siab ntawm 15 MPa, Cerium (III) oxide tuaj yeem tau los ntawm hydrogen txo ntawm cerium oxide. Thaum qhov kub thiab txias yog dawb ntawm 2000 ℃, thiab lub siab yog dawb ntawm 5 MPa, lub cerium oxide yog me ntsis daj, me ntsis liab, thiab liab.
Lub cev muaj zog
Cov khoom siv ntshiab yog cov hmoov dawb hnyav lossis cov pob zeb muaju, thaum cov khoom tsis huv yog lub teeb daj lossis xim liab rau xim av xim av (vim muaj cov kab ntau ntawm lanthanum, praseodymium, thiab lwm yam).
Qhov ceev 7.13g / cm3, melting point 2397 ℃, boiling point 3500 ℃ ..
Insoluble hauv dej thiab alkali, me ntsis soluble hauv acid.
Toxic, Median lethal koob (rat, qhov ncauj) yog li 1g / kg.
Txoj kev tsim khoom
Txoj kev tsim cov cerium oxide feem ntau yog oxalic acid nag lossis daus, uas yog, noj cerium chloride los yog Cerium nitrates tov raws li raw khoom, kho tus nqi Ph rau 2 nrog oxalic acid, ntxiv ammonia rau precipitate Cerium oxalate, cua sov, maturing, sib cais, ntxuav. , ziab ntawm 110 ℃, thiab hlawv ntawm 900 ~ 1000 ℃ los ua cov cerium oxide.
CeCl2 + H2C2O4 + 2NH4OH → CeC2O4 + 2H2O + 2NH4Cl
Daim ntawv thov
Cov tshuaj oxidizing. Catalysts rau Organic cov tshuaj tiv thaiv. Siv lub ntiaj teb tsis tshua muaj hlau qauv qauv rau kev ntsuam xyuas steel. Redox titration tsom xam. Khov iav. Iav enamel sunshade. Thaum tshav kub kub resistant alloy.
Siv los ua ib qho ntxiv hauv kev lag luam iav, ua cov khoom sib tsoo rau cov iav phaj, thiab kuj yog ib tus neeg sawv cev tiv thaiv UV hauv cov tshuaj pleev ib ce. Tam sim no, nws tau nthuav dav mus rau kev sib tsoo ntawm cov iav tsom iav, qhov muag pom kev, thiab cov raj duab, ua lub luag haujlwm hauv decolorization, kev qhia meej, UV nqus ntawm iav, thiab nqus cov kab hluav taws xob.
Tsis tshua muaj ntiaj teb polishing nyhuv
Tsis tshua muaj lub ntiaj teb polishing hmoov muaj qhov zoo ntawm kev ceev polishing ceev, siab smoothness, thiab kev pab lub neej ntev. Piv nrog cov tsoos polishing hmoov - hlau liab hmoov, nws tsis ua phem rau ib puag ncig thiab yooj yim tshem tawm los ntawm cov khoom siv. Polishing lub lens nrog cerium oxide polishing hmoov yuav siv sij hawm ib feeb kom tiav, thaum siv hlau oxide polishing hmoov yuav siv sij hawm 30-60 feeb. Yog li ntawd, tsis tshua muaj lub ntiaj teb polishing hmoov muaj qhov zoo ntawm qhov tsawg npaum li cas, ceev polishing ceev, thiab siab polishing efficiency. Thiab nws tuaj yeem hloov qhov polishing zoo thiab kev ua haujlwm ib puag ncig. Feem ntau, tsawg lub ntiaj teb iav polishing hmoov tsuas yog siv cerium nplua nuj oxides. Yog vim li cas cerium oxide yog ib qho zoo heev polishing compound yog vim hais tias nws muaj peev xwm ib txhij polish iav los ntawm ob qho tib si tshuaj decomposition thiab mechanical kev sib txhuam. Tsis tshua muaj lub ntiaj teb cerium polishing hmoov yog dav siv rau polishing lub koob yees duab, lub koob yees duab lo ntsiab muag, TV raj, tsom iav, thiab lwm yam. Tam sim no, muaj kaum ob lub ntiaj teb tsis tshua muaj polishing hmoov factories nyob rau hauv Suav teb, nrog ib tug ntau lawm scale ntawm tshaj kaum tons. Baotou Tianjiao Qingmei Tsis tshua muaj ntiaj teb Polishing Powder Co., Ltd., Sino txawv teb chaws sib koom ua lag luam, yog tam sim no ib qho ntawm lub ntiaj teb tsawg tshaj plaws polishing hmoov factories nyob rau hauv Suav teb, nrog rau ib xyoos twg muaj peev xwm ntawm 1200 tons thiab cov khoom muag nyob rau hauv domestic thiab txawv teb chaws.
iav decolorization
Tag nrho cov iav muaj hlau oxide, uas tuaj yeem coj mus rau hauv iav los ntawm cov khoom siv raw, xuab zeb, limestone, thiab iav tawg hauv cov khoom xyaw iav. Muaj ob hom ntawm nws lub neej: ib qho yog divalent hlau, uas hloov lub iav xim rau hauv xiav tsaus, thiab lwm yam yog trivalent hlau, uas hloov lub iav xim mus rau daj. Discoloration yog oxidation ntawm divalent hlau ions rau hauv trivalent hlau, vim hais tias cov xim siv ntawm trivalent hlau tsuas yog ib feem kaum ntawm divalent hlau. Tom qab ntawd ntxiv ib lub toner rau neutralize xim rau ib lub teeb ntsuab xim.
Lub ntiaj teb tsis tshua muaj siv rau iav decolorization feem ntau yog cerium oxide thiab neodymium oxide. Hloov cov tshuaj dawb arsenic decolorizing tus neeg sawv cev nrog lub ntiaj teb tsis tshua muaj iav decolorizing tus neeg saib xyuas tsis tsuas yog txhim kho kev ua haujlwm, tab sis kuj zam cov pa phem ntawm cov arsenic dawb. Cerium oxide siv rau iav decolorization muaj qhov zoo xws li kev ua haujlwm kub-kub ruaj khov, tus nqi qis, thiab tsis pom lub teeb pom kev zoo.
iav xim
Tsis tshua muaj lub ntiaj teb ions muaj xim ruaj khov thiab ci ntsa iab ntawm qhov kub thiab txias, thiab siv los sib xyaw rau hauv cov khoom siv los tsim ntau yam xim iav. Tsis tshua muaj lub ntiaj teb oxides xws li neodymium, praseodymium, erbium, thiab cerium yog cov xim iav zoo heev. Thaum cov iav pob tshab nrog cov xim tsis tshua muaj lub ntiaj teb absorbs pom lub teeb nrog wavelengths xws li 400 txog 700 nanometers, nws pom cov xim zoo nkauj. Cov iav xim no tuaj yeem siv los ua qhov taw qhia teeb pom kev rau aviation thiab navigation, ntau lub tsheb thauj mus los, thiab ntau yam kev kos duab zoo nkauj.
Thaum neodymium oxide ntxiv rau sodium calcium iav thiab Lead iav, xim ntawm iav nyob ntawm qhov tuab ntawm iav, cov ntsiab lus ntawm neodymium thiab qhov siv ntawm lub teeb ci. Nyias iav yog lub teeb liab, thiab iav tuab yog xiav ntshav. Qhov tshwm sim no hu ua neodymium dichroism; Praseodymium oxide tsim cov xim ntsuab zoo ib yam li chromium; Erbium (III) oxide yog liab dawb thaum siv hauv Photochromism iav thiab siv lead ua iav; Kev sib xyaw ntawm cerium oxide thiab titanium dioxide ua rau lub khob daj; Praseodymium oxide thiab neodymium oxide tuaj yeem siv rau praseodymium neodymium dub iav.
Rare ntiaj teb clarifier
Kev siv cerium oxide es tsis txhob siv cov tshuaj arsenic oxide los ua iav kom pom tseeb kom tshem tawm cov npuas thiab cov xim xim muaj txiaj ntsig zoo rau kev npaj cov iav tsis muaj xim. Cov khoom tiav lawm muaj cov dawb crystal fluorescence, zoo pob tshab, thiab txhim kho iav lub zog thiab kub ua hauj. Nyob rau tib lub sijhawm, nws kuj tshem tawm cov pa phem ntawm arsenic rau ib puag ncig thiab iav.
Tsis tas li ntawd, ntxiv cerium oxide rau iav niaj hnub, xws li lub tsev thiab tsheb iav, siv lead ua iav, tuaj yeem txo qhov kev xa tawm ntawm ultraviolet lub teeb, thiab qhov kev siv no tau nce qib hauv Nyiv thiab Tebchaws Meskas. Nrog rau kev txhim kho lub neej zoo hauv Suav teb, kuj tseem yuav muaj kev lag luam zoo. Ntxiv neodymium oxide rau lub iav plhaub ntawm lub raj duab tuaj yeem tshem tawm qhov tawg ntawm lub teeb liab thiab ua kom pom tseeb. Cov tsom iav tshwj xeeb nrog lub ntiaj teb tsis tshua muaj ntxiv suav nrog lanthanum iav, uas muaj qhov ntsuas siab tsis zoo thiab cov yam ntxwv tsis sib xws, thiab tau siv dav hauv kev tsim ntau yam lo ntsiab muag, cov koob yees duab siab heev, thiab lub koob yees duab lo ntsiab muag, tshwj xeeb tshaj yog rau cov khoom siv yees duab siab; Ce hluav taws xob pov thawj iav, siv rau iav iav thiab TV iav plhaub; Neodymium iav yog siv los ua cov khoom siv laser thiab yog cov khoom siv zoo tshaj plaws rau cov lasers loj heev, feem ntau yog siv rau kev tswj cov khoom siv Nuclear fusion.
Post lub sij hawm: Jul-06-2023