Lus piav qhia luv luv:

SmCo hlau nplaum sawv cev rau tiam tshiab ntawm cov khoom sib nqus. Lawv tau tsim dua 40 xyoo dhau los thiab qhia txog lub sijhawm ntawm cov hlau nplaum ruaj khov motors. Lub sijhawm ntawd, cov hlau tsis tshua muaj hauv ntiaj teb no kim heev. Thaum xyoo 1980s, SmCo cov khoom tau hloov pauv los ntawm NdFeB hlau nplaum. Vim tias tus nqi nce siab nyob rau hauv lub ntiaj teb tsis tshua muaj neodymium thiab dysprosium (Nd / Dy), cov khoom siv tam sim no tau rov ua nws qhov chaw nyob hauv cov ntawv thov ntawm qhov kub siab dua (150 ° C - 200 ° C). Txawm li cas los xij, muaj kev txwv rau cov khoom siv hais txog qhov siab tshaj plaws remanence. Ob hom loj ntawm SmCo hlau nplaum muaj, 1: 5 hom (SmCo5) thiab 2: 17 hom (Sm2Co17). SmCo hlau nplaum muaj cov khoom sib nqus zoo heev thiab cov khoom kub.