Cov khoom "lanthanum"

Lub ntiaj teb tsis tshua muaj, ib qho piv txwv uas siv ntau, tuaj yeem hais tias yog cov vitamins ntawm kev lag luam yog tias roj yog cov ntshav ntawm kev lag luam. Cov hlau tsis tshua muaj hauv ntiaj teb yog ib pawg ntawm cov hlau, muaj 17 yam khoom ntawm lub rooj teev cov ntsiab lus tshuaj lom neeg, xws lilanthanum, cerium, thiab praseodymium, uas siv dav hauv cov khoom siv hluav taws xob, petrochemicals, metallurgy thiab lwm yam teb. Cov ntsiab lus no ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev ua tau zoo thiab kev ua haujlwm ntawm ntau yam khoom thiab cov txheej txheem.

Cov kws tshawb fawb tuaj yeem tshawb pom cov kev siv tshiab rau cov hlau tsis tshua muaj nyob txhua 3-5 xyoos, thiab ib qho ntawm txhua rau qhov kev tsim kho tshiab siv cov hlau tsis tshua muaj nyob. Qhov no qhia txog qhov tseem ceeb thiab txuas ntxiv uas cov hlau tsis tshua muaj nyob ua rau kev nce qib thiab kev tsim kho tshiab.

Tuam Tshoj muaj cov hlau tsis tshua muaj nyob hauv ntiaj teb, qeb duas ua ntej hauv ntiaj teb hauv kev khaws cia, qhov ntau thiab tsawg ntawm kev tsim khoom, thiab qhov ntim xa tawm. Qhov no tsis yog tsuas yog qhia txog Tuam Tshoj cov khoom muaj nqis xwb tab sis kuj qhia txog nws lub peev xwm muaj zog hauv kev khawb av, kev ua, thiab kev faib tawm ntawm cov hlau tsis tshua muaj. Tib lub sijhawm, Tuam Tshoj yog tib lub tebchaws uas tuaj yeem muab tag nrho 17 hom hlau tsis tshua muaj, tshwj xeeb tshaj yog cov hlau tsis tshua muaj nruab nrab thiab hnyav uas muaj kev siv tub rog zoo heev. Tuam Tshoj

txoj haujlwm tseem ceeb hauv qhov no tau nyiam kev saib xyuas thiab kev khib los ntawm lwm lub tebchaws.

Xyoo 1839, ib tug txiv neej Swedish hu ua Moisander tau muab lub npe no rau hauv daim ntawv "lanthanum" thaum nws pom tias lub ntiaj teb cerium muaj lwm yam khoom. Nws tau qiv ib lo lus Greek uas txhais tau tias "zais" los muab lub npe no rau hauv daim ntawv "Lanthanum", uas yog ib qho kev txiav txim siab uas yog ib kauj ruam tseem ceeb hauv kev faib tawm thiab kev nkag siab txog cov khoom siv tshuaj lom neeg.

Daim ntawv thov ntawm lanthanum yog dav heev. Piv txwv li, hauv cov ntaub ntawv piezoelectric, nws pab hloov lub zog tshuab mus rau hauv lub zog hluav taws xob thiab vice versa, ua rau nws tseem ceeb heev hauvCov sensors thiab actuators. Hauv cov ntaub ntawv cua sov, lanthanum pab txhawb kev hloov pauv cua sov thiab kev ruaj khov. Hauv cov ntaub ntawv thermoelectric, nws txhim kho kev ua haujlwm ntawm kev hloov cua sov mus rau hauv hluav taws xob. Hauv cov ntaub ntawv tiv taus magnetic, nws hloov kho cov khoom sib nqus, thaum nyob rau hauv cov ntaub ntawv luminescent (LAN hmoov), nws tsim cov teeb pom kev zoo thiab ua haujlwm tau zoo. Lanthanum kuj tseem ceeb hauv cov ntaub ntawv khaws cia hydrogen, uas tso cai rau kev khaws cia thiab tso tawm hydrogen zoo dua. Hauv iav kho qhov muag, nws txhim kho qhov ntsuas refractive thiab kev pom tseeb. Hauv cov ntaub ntawv laser, nws ua rau muaj kev tsim cov teeb laser muaj zog thiab meej. Tsis tas li ntawd, lanthanum siv rau hauv ntau yam khoom siv alloy los txhim kho lawv lub zog, kev ruaj khov, thiab lwm yam khoom. Lanthanum kuj tseem siv rau hauv kev npaj ntau yam khoom siv tshuaj lom neeg ua catalyst, pab txhawb kev tshuaj lom neeg thiab txhim kho cov khoom tsim tawm. Ntxiv mus, lanthanum siv rau hauv cov yeeb yaj kiab ua liaj ua teb photocatalytic txawv teb chaws, uas tau pom cov txiaj ntsig zoo hauv kev txhim kho kev loj hlob thiab kev tiv thaiv qoob loo. Hauv cov teb chaws txawv teb chaws, cov kws tshawb fawb tau muab lub luag haujlwm ntawm lanthanum hauv cov qoob loo lub npe menyuam yaus ntawm "super calcium", hais txog nws qhov tseem ceeb hauv kev siv ua liaj ua teb.