Cov hlau nplaum ruaj khov hlau nplaum ferrite yog siv nyob rau hauv ntau qhov kev lag luam xws li cov khoom siv hluav taws xob, hluav taws xob hauv computer, tsheb, cov cuab yeej siv hluav taws xob, lub zog hluav taws xob, thiab cov khoom siv kho mob vim nws cov khoom siv hluav taws xob sib nqus thiab siab coercive ntawm NdFeB hlau nplaum. Cov hlau nplaum ntawm NdFeB hlau nplaum tau muab faib ua sintered NdFeB hlau nplaum thiab sib txuas NdFeB hlau nplaum. Nyob rau theem no, cov txheej txheem tsim khoom ntawm sintered NdFeB cov hlau nplaum ruaj khov yog kev npaj cov khoom siv ua ntej - casting thiab smelting - crushing thiab sib tsoo - nias - calcining - laus - tshuaj xyuas.
Puas yog qhov coercivity ntawm NdFeB hlau nplaum cuam tshuam rau cov hlau nplaum sib nqus? Hcj Intrinsic Permeability Lub sib nqus induction siv nyob rau hauv qhov opposite kev taw qhia yuav tsum tau txo qhov magnetization ntawm magnetic teb mus rau xoom yog hu ua intrinsic permeability, thiab nws chav tsev ntawm kom muaj nuj nqis yog tib yam li permeability. Hom khoom sib nqus tau muab faib raws li nws qhov sib nqus sib nqus permeability. Tsawg permeability N, nruab nrab permeability M, siab coercivity H, extraordinary siab permeability UH, tsis tshua muaj siab coercivity EH, thiab supreme permeability TH. Lub intrinsic magnetic permeability ntawm muaj zog NdFeB hlau nplaum yuav txo vim qhov kub thiab txias. Yog li ntawd, nyob rau hauv rooj plaub ntawm kev xaiv thiab siv cov hlau nplaum NdFeB muaj zog, koj yuav tsum xaiv tus qauv tsim nyog rau txhua tus.
Kev ua haujlwm siab dua: Qhov ntsuas kub ntawm qhov ntsuas kub ntawm NdFeB hlau nplaum thiab cov hlau nplaum tsis tshua muaj hauv ntiaj teb tau ua rau tsim cov qib magnetite kom ua tau raws li qhov sib txawv ntawm kev ua haujlwm kub. Ua ntej xaiv cov hlau nplaum muaj zog NdFeB, nws yog ib qho tsim nyog los txiav txim siab qhov siab tshaj plaws ua haujlwm kub. Lub tshav kub tsis kam ntawm NdFeB hlau nplaum tsis zoo heev. Nyob rau theem no, qhov siab yog 200 degrees ntawm samarium cobalt, thiab cov khoom sib nqus zog ntawm 30 tuaj yeem tiv taus 300 degrees. Tom qab txo qhov sib nqus poob, nws tuaj yeem yog 450 degrees.
NdFeB muaj qhov sib nqus permeability thiab coercivity ntawm NdFeB hlau nplaum, thiab nws tsis yooj yim rau demagnetize thiab magnetize nyob rau hauv ib txwm muaj xwm txheej thiab cov qauv electromagnetic teb. Piv txwv li ib puag ncig ib puag ncig ntuj, lub zog sib nqus ntawm cov hlau nplaum yuav tsis raug puas tsuaj ntau txawm tias los ntawm daim ntawv thov mus sij hawm ntev. Yog li ntawd, hauv cov ntawv thov tshwj xeeb, tib neeg feem ntau tsis quav ntsej qhov teeb meem ntawm lub sijhawm ua rau lub zog sib nqus.
Kev sib piv ntawm coercivity ntawm samarium cobalt hlau nplaum: samarium cobalt hlau nplaum kuj kim, muaj qhov ruaj khov sib nqus permeability thiab tswj cov yam ntxwv kub zoo, tab sis yog hloov los ntawm neodymium hlau boron hlau nplaum nyob rau hauv ntau zaus, samarium cobalt hlau nplaum yog tsim nyog tshaj neodymium hlau boron hlau nplaum ua hauj lwm nyob rau hauv lub iav tsom iav kub kub.
