Khoom npe: High Purity Gadolinium Hlau
Tshuaj formula: Gd
CAS: 7440-54-2
EINECS: 231-162-2
Purity: 99.9%
Xim: nyiaj dawb
Atomic hnyav: 157.25
Atomic naj npawb: 64
Melting point: 1313 degree
Kub taw tes: 3273 degree
Qhov ceev: 7.901g / cm3
Tus qauv tsim: XB/T 212-2015
Puab: thaiv, hmoov, ntawv, hlau, pas nrig, ntawv ci los yog raws li tus neeg yuav tsum tau muaj
Ntim: ntim rau hauv lub nruas hlau, kab nrog ib/ob lub hnab yas thiab ntim nrog argon rau kev tiv thaiv los yog raws li tus neeg yuav tsum tau muaj
Taw qhia ntawm gadolinium element:
Gadolinium yog cov nyiaj dawb-dawb hlau uas yog ductile, mos hauv kev ntxhib los mos, thiab sib nqus ntawm chav tsev kub. Nws yog ib qho tseem ceeb uas tsis tshua muaj lub ntiaj teb. Cov ntsiab lus ntawm gadolinium nyob rau hauv lub ntiaj teb crust yog 0.000636%, thiab nws tsuas yog muaj nyob rau hauv monazite thiab bastnasite.
Cov khoom ntawm metallic gadolinium:
Gadolinium kuj ruaj khov nyob rau hauv cov huab cua qhuav, tab sis yuav poob nws cov luster nyob rau hauv noo noo thiab daim ntawv xoob, yooj yim-rau-poob tawm flaky dawb oxides. Nws tuaj yeem tsim cov oxides dawb thaum hlawv hauv huab cua. Gadolinium reacts maj mam nrog dej thiab tuaj yeem yaj hauv cov kua qaub los ua cov ntsev tsis muaj xim. Nws cov khoom siv tshuaj lom neeg zoo ib yam li lwm cov khoom siv lanthanide, tab sis nws cov khoom siv kho qhov muag thiab sib nqus sib txawv me ntsis. Gadolinium yog paramagnetic ntawm chav tsev kub thiab ua ferromagnetic thaum txias. Nws cov khoom tuaj yeem siv los txhim kho cov hlau nplaum ruaj khov.
Gadolinium muaj dav daim ntawv thov kev cia siab nyob rau hauv daim ntawv thov sib nqus tub yees. Gadolinium muaj zog magnetocaloric nyhuv ntawm chav tsev kub. Nws qhov kub thiab txias nce nrog qhov nce ntawm thaj chaw sib nqus thiab txo qis nrog qhov txo qis ntawm thaj chaw sib nqus. Cov yam ntxwv no ua rau nws haum rau thaj chaw ntawm chav tsev kub sib nqus tub yees. Raws li lub plawv ntawm magnetic refrigeration technology, kev ua tau zoo ntawm cov khoom sib nqus tub yees ncaj qha cuam tshuam rau lub zog thiab kev ua haujlwm ntawm cov tub yees sib nqus. Thaum lub sijhawm ua tub yees, cov khoom sib nqus cua sov nyob rau hauv ib qho chaw sib nqus sab nraud vim yog kev taw qhia ntawm cov hlau nplaum dipoles. Thaum cov magnetic teb raug tshem tawm thiab cov cua sov yog insulated, cov khoom kub txo. Qhov kev sib nqus cua txias no tuaj yeem txo qhov kev siv cov tub yees txias xws li CFC thiab txias sai. Tam sim no, lub ntiaj teb tab tom ua haujlwm hnyav los tsim cov ntawv thov ntawm gadolinium cov ntsiab lus thiab lawv cov alloys hauv cheeb tsam no los tsim cov tub yees me me thiab muaj txiaj ntsig zoo uas siv cov ntsiab lus gadolinium. Ultra-tsawg kub tuaj yeem ua tiav raws li qee qhov xwm txheej, yog li gadolinium tseem hu ua "cov hlau txias tshaj plaws hauv ntiaj teb."
Gadolinium muaj lub siab tshaj plaws thermal neutron capture nto thiab yuav siv tau raws li reactor tswj cov ntaub ntawv thiab cov ntaub ntawv tiv thaiv; ultra-low kub nyob ze rau qhov xoom yuav tau los ntawm kev siv gadolinium ntsev rau magnetized tub yees.
Txoj kev npaj ntawm gadolinium hlau:
Kev sib xyaw ntawm gadolinium fluoride thiab hlau calcium yog siv los tsim metallic gadolinium los ntawm kev txo calciothermic.
2GdF3+3Ca→3CaF2+2Gd
Kev siv cov hlau gadolinium:
1. MRI sib piv tus neeg sawv cev. Txhawm rau kom gadolinium nkag mus rau hauv lub cev yam tsis ua rau muaj kev phom sij, nws yuav tsum dhau los ntawm cov txheej txheem hu ua chelation. Gadolinium chelate yog ib hom kev siv MRI sib txawv hauv kev kho mob, nrog txog 30% ntawm kev kuaj Magnetic resonance yuav tsum tau siv cov xov xwm sib txawv. Nws yog siv los kuaj xyuas cov mob xws li mob raum, mob hlwb, mob qog noj ntshav thiab txha caj qaum. Dej-soluble paramagnetic complexes ntawm gadolinium yog siv rau kev kho mob los txhim kho tib neeg lub cev nuclear magnetic resonance (NMR) imaging signals.
2. Nyias zaj duab xis txheej. Gadolinium sputtering lub hom phiaj thiab gadolinium evaporation cov ntaub ntawv yog siv nyob rau hauv cov txheej txheem deposition, xws li semiconductor deposition, tshuaj vapor deposition (CVD) thiab lub cev vapor deposition (PVD).
3. Siv nyob rau hauv GGG (Gadolinium Gallium Garnet).Gadolinium nyob rau hauv Gadolinium Gallium Garnet yog ib qho zoo tagnrho substrate rau magnetic npuas nco.
4. Hauv kev lag luam atomic zog. Qhov loj neutron absorption cross-section yam ntxwv ntawm europium thiab gadolinium isotopes yog siv los tswj rods thiab neutron absorbers rau lub teeb dej reactors thiab ceev neutron breeder reactors. Gadolinium yog siv los ua tus inhibitor los tswj cov qib tshuaj tiv thaiv kab mob hauv cov chaw tsim hluav taws xob nuclear kom muaj kev nyab xeeb ntawm cov tshuaj tiv thaiv nuclear. Gadolinium yog siv los tswj cov pas nrig hauv nuclear fais fab nroj tsuag. Qhov no yog vim gadolinium absorbs neutrons. Qhov no txhais tau tias nws muaj ib tug high core capture cross section. Absorbing cov neutrons tiv thaiv lawv los ntawm ua fission nyob rau hauv cov roj nuclear. Ntxiv nrog rau nws txoj haujlwm ua tus tswj kav, gadolinium kuj tseem siv tau los ua kev ntsuas kev kaw hauv nuclear reactors. Lawv siv gadolinium ua qhov kev ntsuas ntsuas thib ob thiab thaum muaj xwm txheej ceev hauv qee lub tshuab hluav taws xob nuclear, tshwj xeeb hauv CANDU (CANADA Deuterium Uranium) nuclear reactor hom.
5. Ua kom zoo dua ntawm qhov tseeb tias gadolinium yog cov tshuaj tiv thaiv muaj zog rau thermal neutrons hauv txhua lub ntsiab lus, pom tsis tau cov neutrons tuaj yeem nqus tau thiab tawm los ntawm gadolinium ntxiv rau kev tswj cov atomic reactors, uas tuaj yeem siv los ua cov tshuaj fluorescent ntawm X- ray zaj. Nws cov sulfur oxide tuaj yeem siv los ua ib daim phiaj matrix rau oscilloscope raj nrog tshwj xeeb ci ci thiab X-ray fluorescent cov ntxaij vab tshaus.
6. Raws li cov khoom siv hauv lub xeev sib nqus tub yees nruab nrab, daim ntawv thov ntawm gadolinium thiab nws cov alloys hauv cov tub yees sib nqus tau ua kom muaj kev vam meej. Sib nqus cov tub yees siv cov hlau nplaum superconducting, nws yog xim hlau gadolinium lossis lawv cov alloys raws li cov tub yees xov xwm ntawm chav tsev kub tau raug tso tawm.
7. Siv los ua ib qho ntxiv rau samarium cobalt hlau nplaum los xyuas kom meej tias qhov kev ua tau zoo tsis hloov nrog qhov kub thiab txias.
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