Cov hlau nplaum ruaj khov
Cov hlau nplaum tas mus li yog cov ntaub ntawv uas tuav lawv cov khoom sib nqus yam tsis tas yuav tsum muaj qhov chaw sib nqus sab nraud. Lawv yog qhov tseem ceeb hauv ntau daim ntawv thov, xws li cov khoom siv hluav taws xob me me mus rau cov motors loj thiab cov tshuab hluav taws xob. Nov yog cov ncauj lus kom ntxaws txog cov hlau nplaum ruaj khov:
Hom Permanent Magnets
Neodymium hlau boron (NdFeB) Magnets:
Yam ntxwv: NdFeB hlau nplaum yog cov hlau nplaum ruaj khov uas muaj zog tshaj plaws, nrog lub zog sib nqus siab heev (cov khoom siv hluav taws xob), me me, thiab lub teeb yuag. Txawm li cas los xij, lawv nquag oxidation thiab xav tau kev tiv thaiv saum npoo (xws li, npib tsib xee plating).
Daim ntawv thov: Dav siv nyob rau hauv hluav taws xob motors, cua turbines, hard disk drives, headphones, thiab sib nqus clamps rau high-kev ua tau zoo daim ntaub ntawv.
Samarium Cobalt (SmCo) Magnets:
Yam ntxwv: SmCo hlau nplaum muaj cov khoom siv hluav taws xob siab thiab kev ruaj ntseg zoo heev. Lawv tiv taus oxidation tab sis kim dua thiab nkig.
Daim ntawv thov: Siv dav hauv aerospace, tub rog, thiab lwm yam kev siv kub.
Ferrite (Ceramic) Magnets:
Yam ntxwv: Ferrite hlau nplaum yog tus nqi qis, corrosion-resistant, thiab tuaj yeem tiv taus qhov kub thiab txias, tab sis muaj cov khoom lag luam qis dua.
Daim ntawv thov: Siv nyob rau hauv cov neeg hais lus, lub cev muaj zog, cov khoom ua si sib nqus, thiab lwm yam kev siv sib nqus.
Alnico hlau nplaum:
Yam ntxwv: Alnico hlau nplaum muaj qhov kub thiab txias thiab tiv thaiv demagnetization tab sis muaj cov khoom siv hluav taws xob qis thiab nkig.
Daim ntawv thov: Siv nyob rau hauv cov twj paj nruag, sensors, cov cuab yeej kev kawm, thiab cov khoom siv kub.
Cov khoom ntawm Permanent Magnets
Residual Induction (Br): Qhov sib nqus induction seem nyob rau hauv ib lub hlau nplaum tom qab tshem tawm sab nraud magnetic teb.
Kev coercivity (Hc): Sab nraud magnetic teb lub zog yuav tsum tau demagnetize ib tug mus tas li hlau nplaum.
Cov Khoom Siv Hluav Taws Xob (BHmax): Tus nqi siab tshaj plaws ntawm cov khoom ntawm magnetic flux ceev thiab magnetic teb lub zog, qhia lub zog ntawm cov hlau nplaum.
Kub stability: Lub peev xwm ntawm ntau hom hlau nplaum ruaj khov los tswj kev ua haujlwm ntawm qhov kub sib txawv. SmCo thiab Alnico hlau nplaum ua tau zoo ntawm qhov kub thiab txias, thaum NdFeB hlau nplaum yuav poob kev ua haujlwm ntawm qhov kub thiab txias.
Resistance rau Demagnetization: Lub peev xwm ntawm cov hlau nplaum ruaj khov los tswj nws cov hlau nplaum nyob rau hauv cov khoom sib nqus sab nraud thiab cov neeg kho tshuab shocks.
Daim ntawv thov ntawm Permanent Magnets
Motors thiab Generators: Cov hlau nplaum tas mus li siv cov hlau nplaum tas mus li los tsim cov hlau nplaum, txhim kho kev ua haujlwm thiab kev ua haujlwm. Lawv tau siv dav hauv tsheb fais fab, cua turbines, thiab lwm yam.
Electronic Devices: Siv nyob rau hauv hard disk drives, hais lus, headphones, thiab me me motors.
Khoom siv kho mob: Xws li cov hlau nplaum hauv Magnetic Resonance Imaging (MRI) cov tshuab.
Sensors thiab Detectors: Siv nyob rau hauv magnetic sensors thiab position detectors.
Cov khoom siv: Cov khoom ua si sib nqus, lub qhov rooj sib nqus, cov cuab yeej sib nqus, thiab cov hlau nplaum hauv tsev txhua hnub.
Manufacturing ntawm Permanent Magnets
Hmoov metallurgy: Feem ntau NdFeB thiab SmCo hlau nplaum yog tsim los siv hmoov metallurgy. Cov hmoov hlau yog nias rau hauv cov duab thiab ces sintered.
Casting: Alnico hlau nplaum feem ntau yog tsim los ntawm casting, qhov twg cov molten alloy yog cam khwb cia rau hauv pwm thiab ces kub-kho.
Txhaj Molding: Qee cov hlau nplaum sib xyaw yog tsim los ntawm kev sib xyaw cov hmoov sib nqus nrog cov yas thiab tom qab ntawd txhaj tshuaj molding.
Kev tuav thiab tu cov hlau nplaum ruaj khov
Kev tiv thaiv: NdFeB hlau nplaum yog nquag oxidation thiab feem ntau yuav tsum muaj txheej tiv thaiv (xws li, npib tsib xee, zinc, lossis epoxy).
Kev ceev faj cia: Cov hlau nplaum yuav tsum tau khaws cia kom deb ntawm cov khoom sib nqus thiab cov khoom siv hluav taws xob kom tsis txhob cuam tshuam.
Kev Tswj Kub Kub: Tsis txhob cuam tshuam rau qhov kub thiab txias ntev los tiv thaiv kev sib nqus degradation.
Cov hlau nplaum tas mus li ua lub luag haujlwm tseem ceeb hauv kev siv thev naus laus zis niaj hnub thiab kev lag luam, thiab lawv cov kev xaiv thiab kev siv yuav tsum tau ua kom zoo raws li kev thov tshwj xeeb.