NdFeB Magnets
NdFeB (Neodymium Iron Boron) cov hlau nplaum yog cov khoom lag luam muaj zog tshaj plaws uas muaj cov hlau nplaum ruaj khov, dav siv hauv kev ua haujlwm siab. Hauv qab no 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 cov qauv siv lead ua Nd2Fe14B. Qhov sib xyaw no muab NdFeB hlau nplaum lawv cov khoom sib nqus zoo heev.
Qauv:
Cov hlau nplaum no feem ntau yog tsim los siv cov txheej txheem hmoov metallurgy, qhov twg cov ntaub ntawv nyoos yog yaj, txias, crushed rau hauv cov hmoov, thiab tom qab ntawd nias thiab sintered los tsim cov qauv microcrystalline. Cov qauv zoo-grained no txhim kho ob qho tib si sib nqus thiab txhua yam khoom.
Cov khoom
Sib Nqus Zog:
Cov Khoom Siv Hluav Taws Xob (BHmax): NdFeB hlau nplaum muaj cov khoom siv hluav taws xob feem ntau yog li ntawm 30 MGOe mus rau 52 MGOe, qhov siab tshaj plaws ntawm tag nrho cov hlau nplaum ruaj khov.
Residual Induction (Br): Lawv pom cov seem induction siab, txhais tau tias lawv tuaj yeem tswj tau qhov chaw sib nqus muaj zog tom qab tshem tawm sab nraud magnetizing.
Kev coercivity (Hc):
Intrinsic Coercivity (Hci): NdFeB hlau nplaum muaj siab intrinsic coercivity, ua rau lawv resistant rau demagnetization.
Kub stability:
Ua haujlwm kub: Standard NdFeB hlau nplaum tuaj yeem ua haujlwm txog qhov kub ntawm 80 degree txog 150 degree, nrog cov qib siab kub muaj peev xwm tiv taus mus txog 200 degree txog 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. Lawv feem ntau xav tau cov txheej txheem tiv thaiv xws li npib tsib xee, zinc, lossis epoxy.
Kev tsim khoom
Hmoov metallurgy:
Kev npaj: Cov ntaub ntawv raw (neodymium, hlau, thiab boron) yog melted ua ke thiab ces txias los ua ib tug 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 machined rau cov duab uas xav tau thiab coated rau kev tiv thaiv corrosion.
Bonded Magnets:
Txheej txheem: Sib nqus hmoov yog tov nrog ib tug polymer binder thiab ces nias los yog txhaj tshuaj molded rau hauv ib tug xav tau.
Qhov zoo: Bonded hlau nplaum tuaj yeem tsim rau hauv cov duab nyuaj, thiab thaum lawv muaj zog sib nqus qis dua piv rau cov hlau nplaum sintered, lawv muab cov khoom siv zoo dua qub thiab tiv thaiv kev tawg.
Daim ntawv thov
Electronics:
Siv hauv hard disk drives, xov tooj ntawm tes, headphones, thiab lwm yam khoom siv me me uas yuav tsum tau muaj zog sib nqus.
Motors thiab Generators:
Siv nyob rau hauv hluav taws xob tsheb, cua turbines, thiab lwm yam high-efficiency motors txhim khu kev qha thiab efficiency.
Cov cuab yeej kho mob:
Ua haujlwm hauv MRI cov tshuab thiab lwm yam khoom siv kho mob uas xav tau cov hlau nplaum muaj zog thiab ruaj khov.
Cov ntawv thov kev lag luam:
Siv rau hauv cov khoom sib nqus sib cais, sib nqus fasteners, sensors, thiab lwm yam kev lag luam.
Cov khoom siv:
Pom nyob rau hauv cov khoom ua si sib nqus, cov hniav nyiaj hniav kub sib nqus, cov cuab yeej sib nqus, thiab cov hlau nplaum hauv tsev niaj hnub.
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 lub desiccant rau qhov chaw cia.
Khaws cov hlau nplaum kom deb ntawm cov khoom hlau thiab lwm yam hlau nplaum kom tsis txhob muaj kev sib nqus hlau nplaum 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.