Tsev neeg ntawm lub ntiaj teb tsis tshua muaj 15 lub ntsiab lus los ntawm tsev neeg lanthanide, ntxiv rau scandium thiab yttrium, uas muaj feem xyuam nrog tsev neeg lanthanide, rau tag nrho ntawm 17 lub ntsiab.
Lawv yog: lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium thiab yttrium. Ib qho ntawm cov haujlwm tseem ceeb tshaj plaws yog cov hlau nplaum ruaj khov, neodymium (Nd).
Cov neeg siv loj tshaj plaws ntawm cov hlau neodymium yog NdFeB cov khoom siv hlau nplaum ruaj khov. Kev taw qhia ntawm NdFeB cov hlau nplaum ruaj khov tau txhaj lub neej tshiab thiab muaj txiaj ntsig rau hauv thaj chaw ntawm lub ntiaj teb tsis tshua muaj siab thev naus laus zis. NdFeB hlau nplaum yog hu ua "tus huab tais ntawm cov hlau nplaum ruaj khov" thiab tau siv dav hauv kev lag luam hluav taws xob thiab tshuab rau lawv cov kev ua tau zoo. Cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb yog ib yam khoom sib nqus ua los ntawm sintering samarium thiab neodymium sib xyaw cov hlau tsis tshua muaj-lub ntiaj teb nrog cov hlau hloov pauv, thiab tom qab ntawd sintered los ntawm hmoov metallurgy txoj kev thiab magnetized los ntawm magnetic teb. Raws li ib yam ntawm cov khoom siv ua haujlwm siab, cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb tau siv dav hauv lub zog, kev thauj mus los, tshuab, kev kho mob, IT, khoom siv hauv tsev thiab lwm yam, thiab tau dhau los ua lub hauv paus ntawm ntau qhov kev lag luam high-tech. Thiab NdFeB tsis tshua muaj lub ntiaj teb cov khoom siv hlau nplaum ruaj khov tau dhau los ua kev lag luam loj tshaj plaws thiab feem ntau kev lag luam vim nws qhov kev ua tau zoo rau tus nqi piv.
Ua ntej, cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb tau siv dav hauv cov khoom siv hlau nplaum, disk drives, khoos phis tawj hard drives, hluav taws xob tsheb, cua turbines, thiab kev lag luam hluav taws xob hluav taws xob, qhov twg muaj qhov xav tau loj heev rau cov khoom siv hlau nplaum.
Thib ob, cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb kuj tseem siv rau hauv cov khoom siv kho mob, kev lag luam tshuaj, aerospace thiab kev tiv thaiv. Hauv cov khoom siv kho mob, cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb feem ntau yog siv rau hauv magnetic resonance imaging systems, electronic paramagnetic resonance equipment, etc. Hauv kev lag luam tshuaj, cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb tuaj yeem siv rau kev sib nqus sib nqus hauv cov txheej txheem ntawm kev sib cais, filtration, concentration, extraction, thiab lwm yam. Nyob rau hauv lub tshav pob ntawm aerospace thiab tiv thaiv, tsis tshua muaj lub ntiaj teb hlau nplaum cov ntaub ntawv yuav siv tau nyob rau hauv lub davhlau tswj thiab navigation systems nyob rau hauv missiles thiab aircraft, thiab lwm yam.
Hauv luv luv, tsis tshua muaj lub ntiaj teb cov khoom siv hlau nplaum ruaj khov muaj cov khoom sib nqus zoo heev thiab thermal stability, thiab tau siv dav hauv ntau yam. Nrog rau kev txhim kho txuas ntxiv ntawm thev naus laus zis, daim ntawv thov kev cia siab ntawm cov khoom siv hlau nplaum tsis tshua muaj hauv ntiaj teb yuav dhau los ua ntau thiab ntau dua.
Cov peev txheej hauv ntiaj teb tsis tshua muaj tsawg heev, thiab tsuas yog nyob rau xyoo tas los no lub teb chaws tau maj mam them nyiaj rau nws thiab tswj cov khoom xa tawm ntawm cov ntiaj teb tsawg.