Neodymium hlau boron (NdFeB) Magnets
Neodymium Iron Boron (NdFeB) cov hlau nplaum, feem ntau hu ua neodymium hlau nplaum, yog cov khoom siv dav tshaj plaws ntawm cov hlau nplaum uas tsis tshua muaj ntiaj teb. Cov hlau nplaum no paub txog lawv lub zog tshwj xeeb thiab muaj peev xwm. Nov yog cov ncauj lus ntxaws ntxaws ntawm NdFeB hlau nplaum:
Kev sib xyaw thiab cov qauv
Kev sib xyaw: NdFeB hlau nplaum yog tsim los ntawm neodymium (Nd), hlau (Fe), thiab boron (B), tsim Nd2Fe14B crystalline qauv. Cov qauv no muab cov hlau nplaum lawv lub zog sib nqus siab.
Qauv: Cov hlau nplaum no feem ntau yog tsim los ntawm kev siv cov hmoov metallurgy txheej txheem, uas ua rau cov khoom zoo-grained microstructure uas ua rau lawv cov khoom muaj zog sib nqus.
Cov khoom
Sib Nqus Zog:
High Magnetic Zog Khoom (BHmax): NdFeB hlau nplaum muaj cov khoom siv hluav taws xob siab tshaj plaws ntawm cov hlau nplaum ruaj khov, feem ntau yog li ntawm 30 MGOe mus rau 52 MGOe.
Residual Induction (Br): Lawv pom cov seem induction siab, txhais tau tias lawv tuaj yeem tswj tau qhov chaw sib nqus muaj zog.
Kev coercivity (Hc):
Intrinsic Coercivity (Hci): Lawv muaj siab intrinsic coercivity, uas ua rau lawv resistant rau demagnetization.
Kub Coefficients: NdFeB hlau nplaum 'magnetic zog tuaj yeem degrade ntawm qhov kub thiab txias, txawm hais tias tsim tshwj xeeb qib nrog coercivity siab dua muaj peev xwm tiv taus qhov kub siab dua.
Kub stability:
Ua haujlwm kub: Standard NdFeB hlau nplaum tuaj yeem ua haujlwm ntawm qhov kub txog li ntawm 80-150 degree, thaum cov qib siab kub tuaj yeem ua haujlwm txog li 200-230 degree .
Mechanical Properties:
Brittleness: NdFeB hlau nplaum yog ib qho nyuaj thiab nkig, ua rau lawv yooj yim rau tawg thiab chipping. Yuav tsum tau ceev faj thaum tuav thiab machining.
Corrosion Resistance:
Yooj yim rau Oxidation: NdFeB hlau nplaum muaj qhov cuam tshuam rau corrosion, tshwj xeeb tshaj yog nyob rau hauv ib puag ncig ntub. Txhawm rau tiv thaiv qhov no, lawv feem ntau yog coated nrog cov txheej txheem tiv thaiv xws li npib tsib xee, zinc, lossis epoxy.
Kev tsim khoom
Hmoov metallurgy:
Kev npaj: Cov khoom siv raw (neodymium, hlau, thiab boron) yog melted ua ke thiab ces txias los ua ib qho ingot.
Pulverization: Lub ingot yog crushed rau hauv ib tug nplua hmoov.
Nias: Cov hmoov yog nias rau hauv pwm nyob rau hauv siab siab los ua ib tug compact duab.
Sintering: Lub compact yog rhuab nyob rau hauv lub tshuab nqus tsev los yog inert cua kom sinter cov hais ua ke, ua kom ceev thiab sib nqus zog.
Machining thiab Txheej: Cov hlau nplaum sintered yog tom qab ntawd machined rau cov duab uas xav tau thiab coated los tiv thaiv corrosion.
Bonded Magnets:
Txheej txheem: Sib nqus hmoov yog tov nrog ib tug polymer binder thiab ces nias los yog txhaj rau hauv pwm.
Qhov zoo: Bonded hlau nplaum tuaj yeem tsim rau hauv cov duab nyuaj thiab muaj zog sib nqus qis dua piv rau cov hlau nplaum sintered tab sis muaj cov khoom siv zoo dua qub thiab tiv thaiv kev tawg.
Daim ntawv thov
Electronics:
Hard disk drives, xov tooj ntawm tes, thiab lub mloog pob ntseg siv NdFeB hlau nplaum rau lawv qhov loj me thiab lub zog siab.
Motors thiab Generators:
Lub tshuab hluav taws xob, suav nrog cov tsheb hluav taws xob, tso siab rau NdFeB hlau nplaum rau kev ua tau zoo.
Cua turbine generators siv cov hlau nplaum no los txhim kho lub zog hloov dua siab tshiab.
Cov cuab yeej kho mob:
Sib nqus resonance imaging (MRI) cov cav tov thiab lwm yam khoom siv kho mob siv NdFeB hlau nplaum rau lawv cov hlau nplaum muaj zog thiab ruaj khov.
Cov ntawv thov kev lag luam:
Cov khoom sib nqus sib nqus, sib nqus fasteners, thiab sensors siv NdFeB hlau nplaum rau ntau yam kev lag luam.
Cov khoom siv:
Cov khoom ua si, cov hniav nyiaj hniav kub sib nqus, thiab lwm yam khoom siv tau txais txiaj ntsig los ntawm lub zog siab thiab compact loj ntawm NdFeB hlau nplaum.
Kev tuav thiab kev nyab xeeb
tuav:
Vim lawv lub zog sib nqus, NdFeB hlau nplaum tuaj yeem ua ke nrog lub zog tseem ceeb, ua rau muaj kev pheej hmoo ntawm kev raug mob. Ua tib zoo saib xyuas kom tsis txhob pinching lossis tawg.
Siv cov cuab yeej tsis sib nqus thiab khaws cov khoom siv hluav taws xob kom deb ntawm cov hlau nplaum NdFeB muaj zog los tiv thaiv kev cuam tshuam lossis kev puas tsuaj.
Cia:
Khaws NdFeB hlau nplaum nyob rau hauv ib puag ncig qhuav kom tiv thaiv corrosion. Yog tias cov hlau nplaum tsis coated, xav txog kev ntxiv ib qho desiccant rau hauv qhov chaw cia.
Khaws cov hlau nplaum kom deb ntawm cov khoom siv hlau thiab lwm yam hlau nplaum kom tsis txhob muaj kev sib tsoo thiab kev puas tsuaj.
Kev Tiv Thaiv Kev Nyab Xeeb:
Siv hnab looj tes tiv thaiv thiab looj tsom iav thaum tuav cov hlau nplaum loj NdFeB.
Yuav tsum paub txog qhov muaj zog sib nqus, uas tuaj yeem cuam tshuam rau kev cog lus kho mob thiab cov khoom siv hluav taws xob.
NdFeB hlau nplaum ua lub luag haujlwm tseem ceeb hauv kev siv thev naus laus zis niaj hnub vim lawv qhov sib nqus sib nqus tsis muaj zog thiab ntau yam. Kev tuav kom zoo, txheej, thiab khaws cia yog qhov tseem ceeb los ua kom lawv lub neej ntev thiab kev ua tau zoo.