Siv lub ntiaj teb tsis tshua muaj oxides los ua cov iav fluorescent
Siv lub ntiaj teb tsis tshua muaj oxides los ua cov iav fluorescent
Daim ntawv thov ntawm Rare Earth Elements Tsim kev lag luam, xws li catalysts, glassmaking, teeb pom kev zoo, thiab metallurgy, tau siv lub ntiaj teb tsis tshua muaj lub sijhawm ntev. Xws li kev lag luam, thaum ua ke, suav txog 59% ntawm tag nrho cov kev siv thoob ntiaj teb. Tam sim no cov chaw tshiab, kev loj hlob siab, xws li roj teeb alloys, ceramics, thiab cov hlau nplaum ruaj khov, kuj tseem siv cov ntsiab lus tsis tshua muaj hauv ntiaj teb, uas suav nrog 41%. Rare Earth Elements in Glass Production Hauv kev tsim cov iav, tsis tshua muaj lub ntiaj teb oxides tau kawm ntev. Tshwj xeeb tshaj yog, yuav ua li cas cov khoom ntawm lub khob yuav hloov nrog qhov sib ntxiv ntawm cov tshuaj no. Ib tug kws tshawb fawb German hu ua Drossbach tau pib ua haujlwm hauv xyoo 1800s thaum nws tau patented thiab tsim ib qho sib xyaw ntawm lub ntiaj teb tsis tshua muaj oxides rau decolorizing iav. Txawm hais tias nyob rau hauv daim ntawv nyoos nrog lwm yam tsawg lub ntiaj teb oxides, qhov no yog thawj coj mus muag siv cerium. Cerium tau pom tias ua tau zoo heev rau kev nqus ultraviolet yam tsis tau muab xim rau xyoo 1912 los ntawm Crookes of England. Qhov no ua rau nws muaj txiaj ntsig zoo rau cov tsom iav tiv thaiv. Erbium, ytterbium, thiab neodymium yog cov REE siv dav tshaj plaws hauv iav. Kev sib txuas lus kho qhov muag siv erbium-doped silica fiber ntau; engineering cov ntaub ntawv ua siv ytterbium-doped silica fiber, thiab iav lasers siv rau inertial confinement fusion siv neodymium-doped. Lub peev xwm los hloov cov khoom fluorescent ntawm iav yog ib qho tseem ceeb tshaj plaws ntawm kev siv REO hauv iav. Fluorescent Properties los ntawm Rare Earth Oxides Tshwj xeeb hauv txoj kev uas nws tuaj yeem tshwm sim zoo tib yam nyob rau hauv lub teeb pom kev thiab tuaj yeem tawm cov xim zoo nkauj thaum zoo siab los ntawm qee qhov wavelengths, fluorescent iav muaj ntau yam kev siv los ntawm kev kho mob thiab kev tshawb fawb biomedical, rau kev ntsuam xyuas xov xwm, tracing thiab kos duab iav enamels. Cov fluorescence tuaj yeem pheej siv REOs ncaj qha mus rau hauv cov iav matrix thaum yaj. Lwm cov ntaub ntawv iav uas tsuas yog cov fluorescent txheej feem ntau ua tsis tiav. Thaum lub sij hawm tsim khoom, cov kev taw qhia ntawm lub ntiaj teb tsis tshua muaj ions nyob rau hauv cov qauv ua rau cov iav fluorescence. REE's electrons raug tsa mus rau lub xeev zoo siab thaum lub zog nkag los siv los ua kom cov ions nquag nquag. Lub teeb emission ntawm ntev wavelength thiab qis zog rov qab lub xeev zoo siab rau hauv av. Hauv cov txheej txheem kev lag luam, qhov no yog qhov tseem ceeb tshwj xeeb vim nws tso cai rau cov iav inorganic microspheres tso rau hauv ib pawg los txheeb xyuas cov chaw tsim khoom thiab ntau tus lej rau ntau hom khoom. Kev thauj khoom ntawm cov khoom tsis cuam tshuam los ntawm microspheres, tab sis ib qho xim ntawm lub teeb yog tsim thaum lub teeb ultraviolet ci ntsa iab ntawm cov khoom, uas tso cai rau cov pov thawj tseeb ntawm cov khoom los txiav txim siab. Qhov no ua tau nrog txhua yam khoom siv, suav nrog hmoov, yas, ntawv, thiab kua. Muaj ntau ntau yam yog muab nyob rau hauv lub microspheres los ntawm kev hloov tus naj npawb ntawm cov tsis, xws li qhov tseeb piv ntawm ntau yam REO, particle loj, particle loj tis, tshuaj muaj pes tsawg leeg, fluorescent zog, xim, magnetic zog, thiab radioactivity. Nws kuj yog qhov zoo los tsim cov fluorescent microspheres los ntawm iav vim lawv tuaj yeem doped mus rau qhov sib txawv nrog REO's, tiv taus qhov kub thiab txias, kev ntxhov siab, thiab muaj tshuaj lom neeg. Nyob rau hauv kev sib piv rau cov polymers, lawv yog superior nyob rau hauv tag nrho cov ntawm cov cheeb tsam, uas tso cai rau lawv siv nyob rau hauv ntau qis concentrations nyob rau hauv cov khoom. Qhov qis solubility ntawm REO nyob rau hauv silica iav yog ib qho kev txwv uas yuav ua rau tsim cov pob zeb hauv ntiaj teb tsis tshua muaj, tshwj xeeb tshaj yog tias cov doping concentration ntau dua li qhov sib npaug ntawm solubility, thiab yuav tsum tau ua tshwj xeeb los txwv kev tsim cov pawg.
Lub sij hawm xa tuaj: Plaub Hlis-04-2022 