Dab tsi yog Permanent Magnet?
Taw qhia
Cov hlau nplaum yog cov khoom uas tsim cov hlau nplaum, uas tuaj yeem nyiam lossis tawm tsam qee yam khoom. Lub magnetic teb yog tsim los ntawm kev txav ntawm electrons nyob rau hauv lub atoms ntawm cov khoom siv hlau nplaum. Muaj ob hom hlau nplaum tseem ceeb - mus tas li thiab ib ntus. Hauv kab lus no, peb yuav tsom mus rau kev nkag siab tias lub hlau nplaum ruaj khov yog dab tsi.
Txhais
Cov hlau nplaum ruaj khov yog cov khoom siv uas tuaj yeem khaws nws cov hlau nplaum txawm tias nws raug tshem tawm ntawm qhov chaw sib nqus sab nraud. Qhov no txhais tau hais tias nws muaj peev xwm tsim nws tus kheej magnetic teb uas yog ywj siab ntawm lwm yam magnetic teb. Qhov no yog qhov sib piv rau cov hlau nplaum ib ntus, uas tsuas yog khaws lawv cov hlau nplaum thaum lawv nyob hauv qhov chaw sib nqus sab nraud.
Lub hlau nplaum ruaj khov ua haujlwm li cas?
Cov hlau nplaum tas mus li ua haujlwm los ntawm kev ua kom cov hlau nplaum sib nqus hauv cov khoom siv. Lub chaw sib nqus yog ib cheeb tsam me me nyob rau hauv cov khoom uas muaj nws tus kheej sib nqus orientation. Cov npe no tuaj yeem ua raws hauv ib qho kev taw qhia, uas ua rau muaj zog sib nqus. Nyob rau hauv ib tug ruaj khov hlau nplaum, cov sib nqus domains yog oriented nyob rau hauv xws li ib tug txoj kev uas lub magnetic teb yog sustained txawm tsis muaj ib tug sab nraud teb.
Hom hlau nplaum ruaj khov
Muaj ntau hom hlau nplaum ruaj khov. Hauv qab no yog qee yam ntawm ntau hom:
1. Alnico Magnets - Cov hlau nplaum no yog tsim los ntawm txhuas, npib tsib xee, thiab cobalt. Lawv muaj zog heev thiab muaj qhov kub siab Curie (qhov kub uas lawv poob lawv cov magnetization).
2. Ceramic Magnets - Kuj hu ua ferrite hlau nplaum, cov no yog tsim los ntawm cov khoom siv ceramic. Lawv yog cov nkig heev thiab muaj lub zog tsawg, tab sis tau siv dav vim lawv cov nqi qis.
3. Rare Earth Magnets - Cov no yog tsim los ntawm lub ntiaj teb tsis tshua muaj xws li neodymium, samarium, thiab dysprosium. Lawv yog hom muaj zog tshaj plaws ntawm cov hlau nplaum ruaj khov, tab sis kuj tseem kim.
4. Flexible Magnets - Cov no yog tsim los ntawm cov khoom siv roj hmab lossis cov khoom yas uas yog infused nrog cov khoom sib nqus. Lawv hloov tau yooj yim thiab tuaj yeem ua tau yooj yim zoo li hauv ntau hom.
Kev siv cov hlau nplaum ruaj khov
Cov hlau nplaum tas mus li muaj ntau daim ntawv thov hauv kev lag luam sib txawv. Hauv qab no yog qee qhov kev siv ntau tshaj plaws:
1. Cov Hluav Taws Xob Hluav Taws Xob - Cov hlau nplaum tas mus li yog siv hauv cov tshuab hluav taws xob los tsim cov hlau nplaum uas xav tau los ua kom muaj zog.
2. Sib Nqus Separators - Cov no yog siv rau hauv kev lag luam xws li mining, ua zaub mov, thiab rov ua dua los cais cov khoom sib nqus los ntawm cov khoom tsis sib nqus.
3. MRI Machines - Cov hlau nplaum tas mus li yog siv hauv MRI cov cav tov los tsim cov hlau nplaum uas siv los tsim cov duab ntxaws ntawm cov qauv hauv lub cev.
4. Audio Speakers - Cov hlau nplaum tas mus li yog siv hauv cov neeg hais lus los tsim lub suab los ntawm vibrating lub diaphragm.
Xaus
Hauv kev xaus, cov hlau nplaum ruaj khov yog cov khoom siv uas muaj peev xwm khaws tau nws cov hlau nplaum txawm tias nws raug tshem tawm ntawm qhov chaw sib nqus sab nraud. Cov hlau nplaum tas mus li ua haujlwm los ntawm kev ua kom cov hlau nplaum sib nqus hauv cov khoom siv. Muaj ntau hom hlau nplaum ruaj khov, thiab lawv muaj ntau daim ntawv thov hauv kev lag luam sib txawv. Kev nkag siab txog cov khoom thiab kev siv cov hlau nplaum ruaj khov yog qhov tseem ceeb rau ntau yam haujlwm xws li engineering mus rau tshuaj.
