Keeb kwm thiab General Situation
Rare ntiaj teb yamyog cov floorboard ntawm IIIB scandium, yttrium thiab lanthanum nyob rau hauv lub periodic rooj. Muaj l7 yam. Lub ntiaj teb tsis tshua muaj lub cev thiab tshuaj lom neeg tshwj xeeb thiab tau siv dav hauv kev lag luam, kev ua liaj ua teb thiab lwm yam. Lub purity ntawm lub ntiaj teb tsis tshua muaj tebchaw ncaj qha txiav txim siab cov khoom tshwj xeeb ntawm cov ntaub ntawv. Cov purity sib txawv ntawm cov ntaub ntawv tsis tshua muaj hauv ntiaj teb tuaj yeem tsim cov khoom siv ceramic, cov ntaub ntawv fluorescent thiab cov khoom siv hluav taws xob nrog cov kev ua haujlwm sib txawv. Tam sim no, nrog kev txhim kho ntawm cov thev naus laus zis thev naus laus zis thev naus laus zis thev naus laus zis, cov khoom siv tsis tshua muaj hauv ntiaj teb tau nthuav tawm txoj kev lag luam zoo, thiab kev npaj cov ntaub ntawv tsis tshua muaj hauv ntiaj teb tau ua haujlwm siab dua cov kev xav tau rau cov khoom siv tsis tshua muaj hauv ntiaj teb. Cerium compound muaj ntau yam kev siv, thiab nws cov txiaj ntsig hauv kev siv feem ntau cuam tshuam nrog nws cov purity, lub cev thiab cov ntsiab lus impurity. Hauv kev faib cov ntsiab lus tsis tshua muaj hauv ntiaj teb, cerium suav txog li 50% ntawm cov khoom siv hluav taws xob tsawg hauv ntiaj teb. Nrog rau kev nce ntxiv ntawm high purity cerium, qhov yuav tsum tau ntawm cov tsis tshua muaj ntiaj teb cov ntsiab lus Performance index rau cerium tebchaw yog siab dua thiab siab dua.Cerium oxideyog ceric oxide, CAS naj npawb yog 1306-38-3, molecular mis yog CeO2, molecular hnyav: 172.11; Cerium oxide yog qhov ruaj khov tshaj plaws oxide ntawm lub ntiaj teb tsis tshua muaj caij cerium. Nws yog daj ntseg daj khoom nyob rau hauv chav tsev kub thiab ua ib tsos tsaus tsawv thaum rhuab. Cerium oxide yog siv dav hauv cov ntaub ntawv luminescent, catalysts, polishing hmoov, UV shielding thiab lwm yam vim nws cov kev ua tau zoo heev. Nyob rau hauv xyoo tas los no, nws tau ua rau muaj kev txaus siab ntawm ntau tus kws tshawb fawb. Kev npaj thiab kev ua tau zoo ntawm cerium oxide tau dhau los ua qhov kev tshawb fawb hotspot nyob rau xyoo tas los no.
Txheej txheem ntau lawm
Txoj Kev 1: Do hauv chav tsev kub, ntxiv sodium hydroxide tov ntawm 5.0mol / L rau cerium sulfate tov ntawm 0.1mol / L, kho tus nqi pH kom siab tshaj 10, thiab nag lossis daus tshwm sim tshwm sim. Cov xuab zeb tau muab tso rau, ntxuav ob peb zaug nrog dej deionized, thiab tom qab ntawd qhuav hauv qhov cub 90 ℃ rau 24 teev. Tom qab sib tsoo thiab lim (particle loj tsawg dua 0.1 hli), cerium oxide tau txais thiab muab tso rau hauv qhov chaw qhuav rau kaw cia. Txoj Kev 2: Siv cerium chloride los yog cerium nitrate ua raw khoom, kho pH nqi rau 2 nrog ammonia dej, ntxiv oxalate rau precipitate cerium oxalate, tom qab cua sov, kho, sib cais thiab ntxuav, ziab ntawm 110 ℃, ces hlawv rau cerium oxide ntawm 900 ~ 1000 ℃. Cerium oxide tuaj yeem tau txais los ntawm cua sov qhov sib xyaw ntawm cerium oxide thiab carbon hmoov ntawm 1250 ℃ hauv qhov chaw ntawm cov pa roj carbon monoxide.
Daim ntawv thov
Cerium Oxide yog siv rau additives ntawm iav kev lag luam, phaj iav sib tsoo cov ntaub ntawv, thiab tau txuas mus rau lub iav sib tsoo iav, optical lo ntsiab muag, kinescope, bleaching, clarification, iav ntawm ultraviolet hluav taws xob thiab nqus hluav taws xob xaim, thiab lwm yam. Nws kuj yog siv los ua cov tshuaj tiv thaiv rau cov iav tsom iav, thiab cerium yog siv los ua cerium titanium daj los ua kom lub iav daj. Lub ntiaj teb tsis tshua muaj oxidation pem hauv ntej muaj qee yam cuam tshuam rau crystallization thiab cov khoom ntawm iav ceramics hauv THE CaO-MgO-AI2O3-SiO2 system. Cov txiaj ntsig kev tshawb fawb pom tau tias qhov sib ntxiv ntawm qhov tsim nyog oxidation pem hauv ntej yog qhov zoo los txhim kho cov txiaj ntsig ntawm cov iav kua, tshem tawm cov npuas, ua kom cov iav qauv compact, thiab txhim kho cov khoom siv kho tshuab thiab alkali tsis kam ntawm cov ntaub ntawv. Qhov zoo tshaj qhov ntxiv ntawm cerium oxide yog 1.5, thaum nws yog siv nyob rau hauv ceramic glaze thiab hluav taws xob kev lag luam raws li ib tug piezoelectric ceramic penetrant. Nws kuj yog siv rau hauv kev tsim cov kev ua haujlwm siab catalyst, roj teeb incandescent npog, X-ray fluorescent screen (tsuas yog siv hauv lens polishing agent). Tsis tshua muaj ntiaj teb cerium polishing hmoov yog dav siv hauv cov koob yees duab, lub koob yees duab lo ntsiab muag, TELEVISION duab raj, lens, thiab lwm yam. Nws kuj tuaj yeem siv rau hauv kev lag luam iav. Cerium oxide thiab titanium dioxide tuaj yeem siv ua ke los ua iav daj. Cerium oxide rau iav decolorization muaj qhov zoo ntawm kev ua haujlwm ruaj khov ntawm qhov kub thiab txias, tus nqi qis thiab tsis pom lub teeb pom kev zoo. Tsis tas li ntawd, cerium oxide yog ntxiv rau iav siv hauv tsev thiab tsheb kom txo tau qhov kev xa tawm ntawm ultraviolet lub teeb. Rau kev tsim cov ntaub ntawv tsis tshua muaj lub ntiaj teb luminescent, cerium oxide yog ntxiv ua activator nyob rau hauv lub ntiaj teb tsis tshua muaj tri-xim phosphors siv nyob rau hauv cov ntaub ntawv luminescent ntawm lub zog txuag teeb thiab cov phosphors siv nyob rau hauv ntsuas thiab hluav taws xob detectors. Cerium oxide kuj yog cov khoom siv raw rau kev npaj cov hlau cerium. Tsis tas li ntawd, nyob rau hauv cov ntaub ntawv semiconductor, qib high-qib pigments thiab photosensitive iav sensitizer, automotive tso purifier tau dav siv. Lub catalyst rau lub tsheb purification yog tsuas yog tsim los ntawm honeycomb ceramic (los yog hlau) cab kuj thiab nto activated txheej. Cov txheej txheej ua kom muaj zog muaj thaj tsam loj ntawm gamma-trioxide, qhov tsim nyog ntawm cov oxides uas ruaj khov ntawm thaj chaw saum npoo, thiab cov hlau uas muaj cov khoom catalytic dispersed hauv txheej. Yuav kom txo tau tus nqi kim Pt, Rh ntau npaum li cas, nce ntau npaum li cas ntawm Pd kuj pheej yig, txo tus nqi ntawm catalyst tsis txo cov tsheb purification catalysts nyob rau hauv lub premise ntawm ntau yam kev ua tau zoo, feem ntau siv Pt. Pd. Ua kom muaj Rh ternary catalyst txheej, feem ntau yog tag nrho cov txheej txheem immersion ntxiv ib qho nyiaj ntawm cerium oxide thiab lanthanum oxide, ua rau lub ntiaj teb tsis tshua muaj cov nyhuv catalytic zoo heev. Precious hlau ternary catalyst. Lanthanum oxide thiab cerium oxide tau siv los ua cov pab cuam txhawm rau txhim kho kev ua haujlwm ntawm A-Alumina txhawb nqa cov hlau loj loj. Raws li kev tshawb fawb, cov txheej txheem catalytic ntawm cerium oxide thiab lanthanum oxide yog tsuas yog los txhim kho cov kev ua haujlwm catalytic ntawm cov txheej txheem nquag, hloov pauv huab cua-roj piv thiab catalysis, thiab txhim kho thermal stability thiab mechanical zog ntawm cov cab kuj.