NdFeB yog ib hom hlau nplaum nyuaj. Cov tuam txhab hlau nplaum muaj zog tsim cov hlau nplaum zoo li no vim nws txoj haujlwm ntau dua li cov hlau nplaum zoo tib yam. Tau kawg, nws daim ntawv thov ntau yog dav dua li lwm cov hlau nplaum. Yog li dab tsi yog nws lub luag haujlwm tseem ceeb? Hauv kev siv tiag tiag, peb yuav tsum xyuam xim rau dab tsi?
NdFeB tsim los ntawm cov tuam txhab hlau nplaum yog tiv taus qhov kub thiab txias, nrog qhov kub siab tshaj plaws ntawm 180 degrees Celsius. Qhov no feem ntau yog nyob ntawm nws tus kheej cov qauv. Txawm tias tib hom tuaj yeem ncav cuag qhov kub thiab txias vim qhov sib txawv ntawm qhov kev quab yuam intrinsic.
Txawm hais tias cov chaw tsim khoom hlau nplaum hais tias nws tiv taus qhov kub siab, nws yuav raug demagnetized ntawm qhov kub tshwj xeeb. Yog li ntawd, ntau lub tuam txhab hlau nplaum yuav tsum nkag siab txog tus yam ntxwv ntawm nws. Nws qhov kev ua tau zoo txawv ntawm cov hlau nplaum ferrite. Ferrite hlau nplaum tsis muaj zog, tab sis lawv tuaj yeem tiv taus qhov kub siab tshaj ntawm 500 degrees Celsius.
Qhov thib ob, tsis tshua muaj kub tsis kam. Peb tau hais saum toj no tias NdFeB tuaj yeem tiv taus qhov kub thiab txias, yog li nws puas yuav cuam tshuam rau nws cov haujlwm ntau yam hauv qhov kub thiab txias? cov lus teb yog qhov tsis zoo. Txawm hais tias qhov kub thiab txias ntawm qhov qis ntawm -60 degrees Celsius, nws yuav tsis muaj kev cuam tshuam rau nws. Ntawm qhov tsis sib xws, qhov kub qis yuav txhim kho nws cov paramagnetism thiab txhim khu kev ruaj ntseg ntawm nws cov khoom siv hluav taws xob.
Thib peb, qhov kub thiab txias dej ntsev yuav cuam tshuam rau nws txoj haujlwm. Cov chaw tsim khoom hlau nplaum tau qhia tias txawm hais tias qhov cuam tshuam ntawm cov dej ntsev ntawm cov hlau nplaum yog qhov me me, vim tias qhov sib nqus permeability ntawm cov dej ntsev tsawg heev, tab sis qhov kub thiab txias dej ntsev sib txawv. Cov dej ntsev kub kub muaj ntau cov ions, txawm tias tsis muaj kev puas tsuaj ntau rau NdFeB nws tus kheej, tab sis rau qee qhov yuav ua rau nws lub sijhawm sib txuas lus zoo.
Yog li ntawd, NdFeB tsim los ntawm cov tuam txhab hlau nplaum muaj zog yog tsim raws li tus neeg siv khoom. Raws li cov qib sib nqus sib txawv, lawv qhov kev ua tau zoo kuj txawv. Ua tib zoo saib xyuas qhov xav tau ib puag ncig ntawm cov hlau nplaum los xaiv qhov ua haujlwm kub ntawm NdFeB.