magnetic ncej txhais physics

Sib nqus ncej yog qhov tseem ceeb hauv physics thiab ua lub luag haujlwm tseem ceeb hauv kev nkag siab txog kev sib cuam tshuam ntawm cov hlau nplaum. Lawv yog cov ntsiab lus lossis thaj chaw hauv thaj chaw sib nqus uas lub zog sib nqus yog qhov muaj zog tshaj plaws. Cov ncej no sawv cev rau cov kev taw qhia uas cov khoom sib nqus ntawm cov khoom sib xyaw ua ke, thiab lawv tau sau tias North (N) thiab South (S) ncej.

Cov khoom sib nqus ntawm cov khoom lossis cov khoom yog tsim los ntawm kev txav ntawm cov nqi hluav taws xob, xws li electrons hauv cov atoms ntawm cov khoom. Kev npaj ntawm cov nqi no tsim ib qho chaw sib nqus uas muaj kev taw qhia, lub zog thiab kev taw qhia. Cov ncej hlau nplaum ntawm cov khoom lossis cov khoom siv yog nyob ntawm qhov kev npaj ntawm cov nqi no thiab tuaj yeem pom los ntawm kev siv lub tshuab ntsuas.

Qhov kev tshawb pom ntawm tus ncej hlau nplaum tau lees paub rau William Gilbert, tus kws kho mob Askiv Askiv, uas tau piav qhia lub tswvyim ntawm tus ncej hlau nplaum thiab qhia txog kev xav tias lub ntiaj teb nws tus kheej yog cov hlau nplaum loj. Lub ntiaj teb magnetic teb yog tsim los ntawm kev txav ntawm cov hlau molten nyob rau hauv nws cov tub ntxhais, uas tsim hluav taws xob tam sim no, tsim ib qho chaw sib nqus nrog rau sab qaum teb thiab sab qab teb ncej.

Cov ncej hlau nplaum muaj ntau daim ntawv thov hauv peb lub ntiaj teb niaj hnub no uas ua rau lub neej txhua hnub yooj yim dua thiab ua haujlwm zoo dua. Piv txwv li, lawv yog qhov tseem ceeb hauv kev ua haujlwm ntawm lub computer hard drives, uas siv cov hlau nplaum me me los khaws cov ntaub ntawv. Tsis tas li ntawd, cov hlau nplaum ntawm cov hlau nplaum yog siv rau hauv cov tshuab hluav taws xob los hloov cov tshuab hluav taws xob rau hauv hluav taws xob hluav taws xob.

Cov ncej hlau nplaum kuj tseem ua lub luag haujlwm tseem ceeb hauv biomedical imaging, tshwj xeeb hauv Magnetic Resonance Imaging (MRI). MRI thev naus laus zis siv cov hlau nplaum muaj zog thiab xov tooj cua tsis muaj zog los tsim cov duab ntawm lub cev thiab cov ntaub so ntswg hauv kev kuaj mob. Cov ncej hlau nplaum ua rau cov kws kho mob thiab cov kws kho mob kom muaj kev nkag siab zoo ntawm tib neeg lub cev thiab tshawb xyuas qhov tsis txaus ntseeg ua ntej lawv dhau los ua teeb meem mob hnyav.

Hauv kev xaus, cov hlau nplaum yog qhov tseem ceeb ntawm lub ntiaj teb ntuj tsim thiab peb lub neej niaj hnub. Lawv yog cov tseem ceeb rau kev ua haujlwm ntawm kev siv tshuab, kev kho mob, thiab kev kawm txog kev tshawb fawb. Tsis tas li ntawd, lawv pab peb kom nkag siab zoo dua peb lub ntiaj teb thiab lub ntiaj teb. Qhov kev nkag siab ntawm cov ncej hlau nplaum no yog qhov tseem ceeb hauv kev txhim kho peb txoj kev paub thiab txhim kho peb lub neej zoo.

txheej txheem tsim khoom

Cov txheej txheem tsim khoom ntawm Magnetic Rod suav nrog ob peb kauj ruam, txhua qhov tseem ceeb los xyuas kom meej qhov zoo thiab kev ntseeg siab ntawm cov khoom kawg. Cov hauv qab no yog cov ntsiab lus luv luv ntawm cov txheej txheem tsim khoom:

Kauj Ruam 1: Raw Khoom Tau Txais
Thawj kauj ruam hauv kev tsim cov Magnetic Rods yog qhov tau txais cov khoom siv raw xws li neodymium, hlau, thiab boron. Cov ntaub ntawv no yog tsim los ntawm cov chaw muag khoom muaj koob npe uas muab cov ntaub ntawv zoo.

Kauj Ruam 2: Kev Npaj Khoom Siv
Thaum cov khoom siv raw tau txais, lawv raug ntxuav, txheeb, thiab sib tov los tsim kom muaj kev sib xyaw ua ke. Qhov no ua kom ntseeg tau tias cov khoom kawg zoo ib yam ntawm nws lub zog sib nqus thiab lwm yam khoom.

Kauj Ruam 3: Sib Nqus Field Orientation
Cov hmoov sib xyaw ces muab tso rau hauv qhov chaw sib nqus uas nws tau taw qhia rau hauv ib qho kev taw qhia tshwj xeeb. Cov kauj ruam no yog qhov tseem ceeb hauv kev ua kom ntseeg tau tias Magnetic Qws muaj qhov muaj zog thiab zoo sib xws.

Kauj Ruam 4: Compact
Lub oriented hmoov yog ces compacted rau hauv ib tug zoo li cov khoom kawg. Cov txheej txheem no suav nrog kev siv lub siab thiab qhov kub thiab txias rau cov hmoov.

Kauj Ruam 5: Sintering
Cov hmoov sib tov yog ces sintered nyob rau hauv ib lub qhov cub, qhov chaw uas nws yuav raug kub kub kom fuse cov khoom ua ke. Cov kauj ruam no yog ib qho tseem ceeb hauv kev ua kom ntseeg tau tias Magnetic Qws muaj qhov xav tau lub zog thiab ua haujlwm ntev.

Kauj Ruam 6: Machining thiab Finishing
Thaum cov khoom sintered tau txias, nws yog machined thiab tiav los tsim cov khoom kawg. Cov kauj ruam no suav nrog kev sib tsoo, polishing, thiab txheej Magnetic Rod los tiv thaiv nws ntawm corrosion.

Kauj Ruam 7: Kev Tswj Xyuas Zoo
Cov kauj ruam kawg hauv cov txheej txheem tsim khoom yog kev tswj kom zoo, qhov twg Magnetic Rod raug kuaj xyuas kom ntseeg tau tias nws ua tau raws li txhua qhov kev xav tau tshwj xeeb. Cov kauj ruam no yog qhov tseem ceeb hauv kev ua kom cov khoom zoo thiab ua tau raws li qhov xav tau ntawm cov neeg siv kawg.

Zuag qhia tag nrho, kev tsim cov Magnetic Rods yog cov txheej txheem nyuaj uas muaj ob peb kauj ruam, txhua qhov tseem ceeb hauv kev ua kom cov khoom kawg yog cov khoom zoo thiab ua tau raws li qhov yuav tsum tau ua. Los ntawm kev ua raws li cov txheej txheem tsim khoom nruj me ntsis, cov tuam txhab sib nqus hlau nplaum tuaj yeem tsim cov khoom lag luam zoo uas ua tau raws li qhov xav tau ntawm lawv cov neeg siv khoom.

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