Tsis tshua muaj ntiaj teb hmoov metallurgy additive Samarium hlau hmoov CAS 7440-19-9 High-Entropy Alloys

Samarium tshwm sim raws li cov xim nyiaj-xim khoom / foils lossis grey hmoov thiab yog ib qho tsis muaj ntxhiab tsw, flammable, thiab dej-reactive khoom. Txhua hom samarium paub tias yuav ua rau cov kua qaub dilute emitting flammable/explosive hydrogen gas. Samarium ntawm kev sib cuag nrog dej reacts thiab liberates tsis tshua muaj nplaim taws gases. Samarium yog incompatible nrog muaj zog acids, muaj zog oxidizing tus neeg sawv cev, thiab halogens. Kev lag luam tseem ceeb ntawm samarium yog nyob rau hauv samarium-cobalt hlau nplaum. Cov hlau nplaum no muaj cov cuab yeej magnetization ruaj khov. Samarium tebchaw tau pom tias tiv taus qhov kub thiab txias, siab tshaj 700 ° C, tsis poob lawv cov khoom sib nqus. Cov xov tooj cua isotope samarium-153 yog cov khoom tseem ceeb ntawm cov tshuaj samarium 153Sm lexidronam (Quadramet). Cov no yog siv los kho cov qog nqaij hlav ntawm lub ntsws, prostate, thiab lub mis thiab osteosarcoma. Samarium kuj tseem siv rau hauv catalysis ntawm tshuaj tiv thaiv, xov tooj cua sib tham, thiab hauv x-ray laser. Samarium yog siv los ua ib qho catalyst nyob rau hauv tej yam kev cuam tshuam cov organic: Samarium iodide (SmI2) yog siv los ntawm cov organic tshawb fawb chemists los ua hluavtaws versions ntawm tej yam ntuj tso khoom. Samarium tshwm sim nrog concentration txog li 2.8% nyob rau hauv ntau yam minerals xws li cerite, gadolinite, samarskite, monazite, thiab bastn?site, ob lub xeem yog cov feem ntau coj mus muag qhov chaw ntawm lub caij. Cov zaub mov no feem ntau pom muaj nyob hauv Suav teb, Tebchaws Meskas, Brazil, Is Nrias teb, Sri Lanka, thiab Australia; Tuam Tshoj yog nyob deb ntawm lub ntiaj teb tus thawj coj hauv samarium mining thiab ntau lawm. Radioactive isotope samarium-153 yog cov khoom tseem ceeb ntawm cov tshuaj samarium (153Sm) lexidronam (Quadramet), uas tua cov qog nqaij hlav cancer hauv kev kho mob qog noj ntshav, mob qog noj ntshav, mob qog noj ntshav, thiab osteosarcoma. Lub isotope, samarium-149, yog ib tug muaj zog neutron absorber thiab yog li ntxiv rau cov tswj rods ntawm nuclear reactors. Samaria oxide yog siv los ua tshwj xeeb infrared-adsorbing iav thiab cores ntawm carbon arc-teeb oxide electrodes thiab ua ib tug catalyst rau lub cev qhuav dej thiab dehydrogenation ntawm ethanol. Nws cov khoom sib xyaw nrog cobalt (SmCo5) yog siv los ua cov khoom siv hlau nplaum ruaj khov tshiab. Samarium tsis muaj lub luag haujlwm lom neeg, tab sis nws tau raug sau tseg tias txhawb cov metabolism. Soluble samarium ntsev yog cov tshuaj lom me me los ntawm kev noj, thiab muaj teeb meem kev noj qab haus huv cuam tshuam nrog cov no vim tias raug samarium ua rau tawv nqaij thiab qhov muag khaus. Ib qho ntawm cov kev siv tseem ceeb tshaj plaws ntawm samarium yog nyob rau hauv samarium-cobalt hlau nplaum, uas muaj cov nominal muaj pes tsawg leeg ntawm SmCo5 los yog Sm2Co17. Lawv muaj cov hlau nplaum ruaj khov, uas yog kwv yees li 10,000 npaug ntawm cov hlau thiab tsuas yog thib ob ntawm cov hlau nplaum neodymium. Samarium yooj yim rau magnetize, tab sis nyuaj heev rau demagnetize. Qhov no ua rau nws zoo tagnrho rau kev tsim cov hlau nplaum ruaj khov (SmCo5) uas yog ib feem ntawm cov hard disks rau cov khoos phis tawj.Samarium tseem siv los ua cov khoom siv hluav taws xob hauv cov hluav taws xob nuclear, nrog rau cov lasers thiab kev tshawb fawb metallurgical. Nws tsim txog li 1% ntawm cov hlau hauv misch hlau, ib qho hlau hauv cov luam yeeb flints. Nws kuj yog ib qho ntawm ntau lub ntiaj teb uas tsis tshua muaj siv hauv cov teeb pom kev nyab xeeb thiab carbon-arc teeb siv los ntawm kev lag luam duab. Samarium yog siv los ua catalyst hauv ntau lub lag luam, suav nrog dehydrogenation ntawm ethanol cawv. Arylsulfonyl chlorides thiab arylsulfinates raug txo los ntawm kev sib xyaw ntawm samarium thiab titanium (IV) chloride los ua diaryl disulfides. Nws yog neutron absorber, dopant rau laser muaju.