Hnub no, nws yuav luag tsis tuaj yeem nrhiav kev lag luam uas tsis siv cov khoom sib nqus nyuaj thiab cov hlau nplaum ruaj khov. Cov no yog acoustics, thiab xov tooj cua electronics, thiab computer, thiab ntsuas cov cuab yeej, thiab automation, thiab cua sov thiab lub zog, thiab hluav taws xob fais fab, thiab kev tsim kho, thiab metallurgy, thiab txhua yam kev thauj, thiab kev ua liaj ua teb, thiab tshuaj, thiab ore ua, thiab Txawm nyob hauv chav ua noj ntawm txhua tus neeg muaj lub qhov cub microwave, nws ua kom sov li pizza. Nws tsis yooj yim sua kom suav txhua yam, cov khoom sib nqus nrog peb ntawm txhua kauj ruam ntawm peb lub neej. Thiab tag nrho cov khoom siv nrog lawv cov kev pab ua haujlwm raws li cov qauv sib txawv: cov cav thiab cov tshuab hluav taws xob muaj lawv tus kheej lub luag haujlwm, thiab cov khoom siv braking muaj lawv tus kheej, lub tshuab cais ua ib yam, thiab cov khoom siv tsis zoo ua lwm yam. Tej zaum, tsis muaj ib daim ntawv teev cov cuab yeej cuab tam uas siv cov khoom siv hlau nplaum nyuaj, muaj ntau ntau.
Dab tsi yog magnetic systems
Peb lub ntiaj teb nws tus kheej yog qhov tshwj xeeb zoo-roj sib nqus system. Tag nrho cov seem yog tsim los ntawm tib txoj cai. Cov khoom siv hlau nplaum nyuaj muaj cov khoom siv sib txawv heev. Nyob rau hauv catalogs ntawm lwm tus neeg, nws tsis yog nyob rau hauv vain uas tsis tau tsuas yog muab lawv cov parameter, tab sis kuj lub cev khoom. Tsis tas li ntawd, nws tuaj yeem ua cov khoom sib nqus thiab cov khoom sib nqus. Piv txwv li, siv resonant tomographs, qhov twg cov tshuab siv nrog cov hlau nplaum sib nqus zoo sib xws, thiab sib piv nrog cov khoom sib cais, qhov chaw yog qhov tsis sib xws. Muaj ib txoj cai txawv heev! Cov tshuab hlau nplaum tau ua tiav, qhov chaw tuaj yeem hloov mus rau thiab tawm. Qhov no yog li cas grips tsim. Thiab qee lub tshuab txawm hloov qhov chaw sib nqus hauv qhov chaw. Cov no yog cov paub zoo klystrons thiab taug kev yoj teeb. Cov khoom ntawm cov ntaub ntawv mos thiab tawv sib nqus yog cov khoom siv tiag tiag. Lawv zoo li cov catalysts, lawv yuav luag ib txwm ua tus neeg nruab nrab, tab sis tsis muaj qhov poob qis ntawm lawv tus kheej lub zog, lawv muaj peev xwm hloov tau lwm tus, tig ib hom rau lwm tus.
Piv txwv li, lub zog sib nqus tau hloov mus rau hauv lub zog siv tshuab hauv kev ua haujlwm ntawm cov txuas, cov khoom sib cais, thiab lwm yam. Cov tshuab hluav taws xob hloov dua siab tshiab nrog kev pab ntawm cov hlau nplaum rau hauv hluav taws xob, yog tias peb cuam tshuam nrog microphones thiab cov tshuab hluav taws xob. Thiab vice versa tshwm sim! Hauv cov neeg hais lus thiab lub cev muaj zog, cov hlau nplaum hloov hluav taws xob rau hauv lub zog siv tshuab, piv txwv li. Thiab qhov ntawd tsis yog tag nrho. Lub zog siv hluav taws xob tuaj yeem hloov mus rau hauv thermal zog, zoo li cov hlau nplaum hauv kev ua haujlwm ntawm lub qhov cub microwave lossis hauv cov khoom siv braking. Muaj peev xwmmagnetically nyuaj thiab magnetically mos cov ntaub ntawv thiab nyob rau hauv tshwj xeeb cov teebmeem - nyob rau hauv Hall sensors, nyob rau hauv magnetic resonance tomographs, nyob rau hauv microwave kev sib txuas lus. Koj tuaj yeem sau ib tsab xov xwm cais txog cov nyhuv catalytic ntawm cov txheej txheem tshuaj, yuav ua li cas gradient magnetic teb nyob rau hauv dej cuam tshuam cov qauv ntawm ions, protein molecules, thiab yaj gases.
Magic from antiquity
Natural material - magnetite - twb paub rau noob neej ntau txhiab xyoo dhau los. Lub sijhawm ntawd, tag nrho cov khoom ntawm cov khoom siv hlau nplaum nyuaj tseem tsis tau paub, thiab yog li ntawd lawv tsis tau siv rau hauv cov cuab yeej siv cuab yeej cuab tam. Thiab tseem tsis tau muaj cov cuab yeej thev naus laus zis. Tsis muaj leej twg paub yuav ua li cas muab xam rau kev khiav hauj lwm ntawm magnetic systems. Tab sis qhov cuam tshuam ntawm cov khoom siv roj ntsha twb tau pom lawm. Kev siv cov khoom siv hlau nplaum tawv tawv thaum xub thawj mus rau kev kho mob nkaus xwb, kom txog rau thaum Suav tau tsim lub compass nyob rau xyoo pua peb BC. Txawm li cas los xij, kev kho mob nrog cov hlau nplaum tseem tsis tau tso tseg txog niaj hnub no, txawm hais tias muaj kev sib tham tas li hais txog kev phom sij ntawm cov txheej txheem zoo li no. Kev siv cov khoom siv hlau nplaum nyuaj hauv cov tshuaj hauv Tebchaws Meskas, Tuam Tshoj, thiab Nyij Pooj yog tshwj xeeb tshaj yog siv. Thiab nyob rau hauv Russia muaj adherents ntawm lwm txoj kev, txawm hais tias nws yog tsis yooj yim sua los ntsuas qhov loj ntawm qhov cuam tshuam rau lub cev los yog cog nrog ib tug instrument.
Tab sis rov qab mus rau keeb kwm. Nyob rau hauv Asia Minor, ntau centuries dhau los, lub ancient nroog ntawm Magnesia twb muaj nyob rau ntawm ntug dej ntawm lub tag nrho-ntws Meander. Thiab niaj hnub no koj tuaj yeem mus xyuas nws cov duab zoo nkauj ruins hauv Turkey. Nws yog nyob ntawd uas thawj cov hlau nplaum hlau tau pom, uas tau muaj npe tom qablub zos. Heev sai heev, nws kis tau thoob plaws ntiaj teb, thiab Suav tsib txhiab xyoo dhau los, nrog rau nws cov kev pab, tau tsim ib tug navigation ntaus ntawv uas tseem tsis tuag. Tam sim no noob neej tau kawm los tsim cov hlau nplaum artificially ntawm kev lag luam. Lub hauv paus rau lawv yog ntau yam ferromagnets. Lub Tsev Kawm Ntawv ntawm Tartu muaj cov hlau nplaum loj tshaj plaws, muaj peev xwm nqa txog plaub caug kilograms, thaum nws tus kheej hnyav tsuas yog kaum peb. Cov hmoov nplej niaj hnub no yog ua los ntawm cob alt, hlau thiab ntau yam khoom ntxiv, lawv tuav tau tsib txhiab npaug ntau dua li qhov hnyav.
Hysteresis voj
Muaj ob hom hlau nplaum. Thawj hom yog qhov tsis tu ncua, uas yog ua los ntawm cov khoom siv hlau nplaum nyuaj, lawv cov khoom tsis muaj kev cuam tshuam nrog cov khoom siv sab nraud lossis cov khoom siv tam sim no. Hom thib ob yog electromagnets. Lawv muaj ib tug tub ntxhais uas ua los ntawm hlau - ib tug magnetically mos cov ntaub ntawv, thiab ib tug tam sim no dhau los ntawm winding ntawm no core, uas tsim ib tug magnetic teb. Tam sim no peb yuav tsum xav txog cov ntsiab cai ntawm nws txoj haujlwm. Characterizes cov khoom sib nqus ntawm hysteresis voj rau cov khoom sib nqus nyuaj. Muaj cov thev naus laus zis nyuaj heev rau kev tsim cov tshuab sib nqus, thiab yog li cov ntaub ntawv xav tau ntawm kev sib nqus, sib nqus permeability, thiab lub zog poob thaum magnetization reversal tshwm sim. Yog hais tias qhov kev hloov ntawm kev siv yog cyclic, lub remagnetization nkhaus (hloov induction) yuav ib txwm zoo li ib tug kaw nkhaus. Qhov no yog lub voj hysteresis. Yog hais tias lub teb tsis muaj zog, ces lub voj yuav zoo li ib tug ellipse.
Thaum lub nrolub magnetic teb nce, ib tug tag nrho series ntawm xws loops yog tau, enclosed nyob rau hauv ib leeg. Nyob rau hauv tus txheej txheem ntawm magnetization, tag nrho cov vectors yog taw qhia raws, thiab thaum kawg, lub xeev ntawm kev saturation yuav tuaj, cov khoom yuav magnetized tag. Lub voj tau txais thaum lub sij hawm saturation yog hu ua lub voj txwv, nws qhia tau hais tias qhov siab tshaj plaws ua tiav tus nqi ntawm induction Bs (saturation induction). Thaum nro txo, residual induction tseem. Qhov chaw ntawm hysteresis loops nyob rau hauv qhov txwv thiab nruab nrab lub xeev qhia lub zog dissipation, uas yog, hysteresis poob. Nws nyob ntawm feem ntau ntawm tag nrho cov magnetization reversal zaus, cov khoom siv, thiab qhov ntev geometric. Lub limiting hysteresis lub voj tuaj yeem txiav txim siab cov yam ntxwv hauv qab no ntawm cov khoom sib nqus nyuaj: saturation induction Bs, residual induction Bc thiab coercive force Hc.
Magnetization nkhaus
qhov nkhaus no yog tus yam ntxwv tseem ceeb tshaj plaws, vim tias nws qhia txog kev vam khom ntawm cov hlau nplaum thiab lub zog ntawm sab nraud. Sib nqus induction yog ntsuas nyob rau hauv Tesla thiab muaj feem xyuam rau magnetization. Qhov hloov nkhaus yog qhov tseem ceeb, nws yog qhov chaw ntawm lub ncov ntawm lub hysteresis loops, uas tau txais thaum lub sij hawm cyclic remagnetization. Qhov no qhia txog kev hloov pauv hauv kev sib nqus induction, uas nyob ntawm lub zog teb. Thaum lub tshuab hluav taws xob sib nqus raug kaw, lub zog teb tau pom nyob rau hauv daim ntawv ntawm toroid yog sib npaug rau lub zog sab nraud. Yog hais tias lub magnetic Circuit Court qhib, ncej tshwm nyob rau ntawm qhov kawg ntawm cov hlau nplaum, uas tsim demagnetization. Qhov txawv ntawmcov tensions no txiav txim siab qhov nro ntawm cov khoom.
Muaj cov yam ntxwv ntawm lub ntsiab nkhaus uas sawv tawm thaum ib qho siv lead ua ntawm ferromagnet yog magnetized. Thawj ntu qhia tau hais tias tus txheej txheem ntawm kev hloov ntawm ciam teb ntawm unfavorably tuned domains, thiab nyob rau hauv lub thib ob, lub magnetization vectors tig mus rau sab nraud magnetic teb. Qhov thib peb seem yog paraprocess, theem kawg ntawm magnetization, ntawm no lub magnetic teb muaj zog thiab qhia. Daim ntawv thov ntawm cov ntaub ntawv mos thiab tawv sib nqus nyob ntawm qhov loj ntawm cov yam ntxwv tau los ntawm qhov nkhaus magnetization.
Permeability thiab zog poob
Txhawm rau ua tus cwj pwm ntawm cov khoom siv hauv qhov nro, nws yog qhov yuav tsum tau siv lub tswv yim zoo li qhov sib nqus permeability. Muaj cov ntsiab lus ntawm impulse, sib txawv, siab tshaj plaws, pib, ib txwm sib nqus permeability. Cov txheeb ze yog taug qab raws lub ntsiab nkhaus, yog li qhov kev txhais no tsis siv - rau kev yooj yim. Sib nqus permeability nyob rau hauv cov xwm txheej thaum H=0 yog hu ua thawj zaug, thiab nws tuaj yeem txiav txim siab tsuas yog hauv thaj chaw tsis muaj zog, txog li 0.1 units. Qhov siab tshaj plaws, ntawm qhov tsis sib xws, characterizes lub siab tshaj plaws magnetic permeability. Qhov ib txwm muaj thiab qhov siab tshaj plaws muab lub sijhawm los saib xyuas cov txheej txheem ib txwm muaj nyob rau hauv txhua rooj plaub. Nyob rau hauv lub saturation cheeb tsam nyob rau hauv muaj zog teb, lub magnetic permeability ib txwm nyhav rau kev sib sau. Tag nrho cov txiaj ntsig no yog qhov tsim nyog rau kev siv cov hlau nplaum nyuajcov ntaub ntawv, ib txwm siv lawv.
Zog poob thaum lub sij hawm magnetization reversal yog irreversible. Hluav taws xob yog tso tawm nyob rau hauv cov khoom raws li cua sov, thiab nws poob yog ua los ntawm dynamic losses thiab hysteresis poob. Cov tom kawg yog tau los ntawm kev hloov cov phab ntsa sau thaum cov txheej txheem magnetization nyuam qhuav pib. Txij li thaum cov khoom siv hlau nplaum muaj cov qauv tsis sib xws, lub zog yuav tsum tau siv los ntawm kev sib dhos ntawm cov phab ntsa. Thiab dynamic poob yog tau nyob rau hauv kev twb kev txuas nrog eddy tam sim no uas tshwm sim thaum lub sij hawm ntawm kev hloov lub zog thiab kev taw qhia ntawm lub magnetic teb. Zog yog dissipated nyob rau hauv tib txoj kev. Thiab qhov kev poob vim yog eddy tam sim no tshaj txawm tias hysteresis poob ntawm qhov siab. Tsis tas li ntawd, dynamic losses tau txais vim qhov seem hloov pauv hauv lub xeev ntawm cov hlau nplaum tom qab qhov kev siv tau hloov. Tus nqi ntawm cov txiaj ntsig tom qab poob yog nyob ntawm qhov muaj pes tsawg leeg, ntawm kev kho cua sov ntawm cov khoom, lawv tshwm sim tshwj xeeb tshaj yog nyob rau hauv high zaus. Cov txiaj ntsig tom qab yog qhov sib nqus viscosity, thiab cov kev poob no ib txwm raug coj mus rau hauv tus account yog tias ferromagnets siv rau hauv hom mem tes.
Kev faib cov khoom siv hlau nplaum nyuaj
Cov ntsiab lus uas hais txog softness thiab hardness tsis siv rau txhua yam khoom. Ntau cov ntaub ntawv nyuaj yog cov khoom siv hlau nplaum, thiab los ntawm cov neeg kho tshuab pom, cov ntaub ntawv mos kuj yog cov hlau nplaum nyuaj heev. Cov txheej txheem ntawm magnetization nyob rau hauv ob pawg ntawm cov ntaub ntawv tshwm sim nyob rau hauv tib txoj kev. Ua ntej, cov ciam teb ciam teb yog hloov chaw, ces qhov kev sib hloov pib hauvnyob rau hauv cov kev taw qhia ntawm ib tug zuj zus magnetizing teb, thiab thaum kawg, lub paraprocess pib. Thiab qhov no yog qhov sib txawv tuaj. Lub magnetization nkhaus qhia tau hais tias nws yooj yim dua rau txav cov ciam teb, tsawg zog yog siv, tab sis cov txheej txheem kev sib hloov thiab cov paraprocess muaj zog ntau dua. Cov khoom sib nqus mos yog magnetized los ntawm kev hloov chaw ntawm ciam teb. Hard magnetic - vim yog kev sib hloov thiab paraprocess.
Cov duab ntawm lub voj hysteresis yog kwv yees tib yam rau ob pawg ntawm cov ntaub ntawv, saturation thiab residual induction kuj nyob ze rau qhov sib npaug, tab sis qhov sib txawv muaj nyob rau hauv lub zog quab yuam, thiab nws loj heev. Cov khoom siv hlau nplaum tawv muaj Hc=800 kA-m, thaum cov khoom sib nqus mos tsuas muaj 0.4 A-m. Nyob rau hauv tag nrho, qhov txawv yog loj: 2106 lub sij hawm. Tias yog vim li cas, raws li cov yam ntxwv no, xws li kev faib tau raug saws. Txawm li cas los xij, nws yuav tsum tau lees paub tias nws yog qhov zoo dua. Cov ntaub ntawv sib nqus mos tuaj yeem saturate txawm nyob hauv qhov chaw tsis muaj zog hlau nplaum. Lawv yog siv nyob rau hauv tsawg zaus teb. Piv txwv li, nyob rau hauv magnetic memory li. Cov khoom siv hlau nplaum nyuaj nyuaj rau kev sib nqus, tab sis lawv khaws cov hlau nplaum ntev heev. Nws yog los ntawm lawv cov hlau nplaum ruaj khov zoo tau txais. Cov cheeb tsam ntawm kev siv cov khoom siv hlau nplaum nyuaj yog ntau thiab dav, qee qhov ntawm lawv tau teev nyob rau hauv qhov pib ntawm tsab xov xwm. Muaj lwm pab pawg - cov khoom siv hlau nplaum rau lub hom phiaj tshwj xeeb, lawv cov peev txheej yog nqaim heev.
Txoj kev nyuaj
Raws li twb tau hais lawm, cov khoom siv hlau nplaum nyuaj muaj lub voj voog hysteresis dav thiab lub zog loj, tsis tshua muaj hlau nplaum permeability. Lawv yog characterized los ntawm lub siab tshaj plaws tshwj xeeb sib nqus zog muab tawm nyob rau hauvqhov chaw. Thiab qhov "nyuaj" cov khoom sib nqus, qhov siab dua nws lub zog, qhov qis permeability. Lub zog sib nqus tshwj xeeb yog muab lub luag haujlwm tseem ceeb tshaj plaws hauv kev ntsuas qhov zoo ntawm cov khoom. Cov hlau nplaum ruaj khov ua haujlwm tsis pub tawm lub zog mus rau qhov chaw sab nraud nrog lub kaw sib nqus sib nqus, vim tias tag nrho cov kab ntawm lub zog yog nyob rau hauv cov tub ntxhais, thiab tsis muaj cov hlau nplaum sab nraud. Txhawm rau ua kom muaj zog tshaj plaws ntawm cov hlau nplaum ruaj khov, qhov sib txawv ntawm huab cua ntawm qhov loj me thiab kev teeb tsa tau tsim nyob rau hauv lub kaw sib nqus sib nqus.
Lub sijhawm dhau mus, cov hlau nplaum "tau laus", nws cov hlau nplaum sib nqus txo qis. Txawm li cas los xij, xws li kev laus tuaj yeem yog ob qho tib si irreversible thiab thim rov qab. Nyob rau hauv tas li ntawd, qhov ua rau ntawm nws aging yog shocks, shocks, kub fluctuations, tas li sab nraud teb. Qhov sib nqus induction yog txo. Tab sis nws tuaj yeem ua tau magnetized dua, yog li kho nws cov khoom zoo heev. Tab sis yog tias cov hlau nplaum ruaj khov tau dhau los ua cov qauv hloov pauv, cov hlau nplaum rov qab yuav tsis pab, kev laus yuav tsis raug tshem tawm. Tab sis lawv ua hauj lwm rau lub sij hawm ntev, thiab lub hom phiaj ntawm cov khoom siv hlau nplaum yog qhov zoo heev. Cov piv txwv muaj nyob txhua qhov chaw. Nws tsis yog cov hlau nplaum ruaj khov xwb. Qhov no yog cov khoom siv rau khaws cov ntaub ntawv, rau kev kaw nws - ob qho tib si suab, thiab digital, thiab video. Tab sis cov saum toj no tsuas yog ib feem me me ntawm kev siv cov khoom siv hlau nplaum nyuaj.
Cov khoom siv hlau nplaum nyuaj
Raws li cov txheej txheem ntawm kev tsim khoom thiab muaj pes tsawg leeg, cov khoom sib nqus tawv tuaj yeem raug cam khwb cia, hmoov thiab lwm yam. Lawv ua raws li cov alloys.hlau, npib tsib xee, txhuas thiab hlau, npib tsib xee, cob alt. Cov txheej txheem no yog qhov yooj yim tshaj plaws kom tau txais cov hlau nplaum ruaj khov. Lawv nyob rau precision, txij li lawv tus lej yog txiav txim los ntawm cov txheej txheem nruj tshaj plaws. Cam khwb cia hlau nplaum cov ntaub ntawv tau txais thaum nag lossis daus hardening ntawm alloy, qhov chaw txias tshwm sim ntawm tus nqi xam los ntawm melting mus rau qhov pib ntawm decomposition, uas tshwm sim nyob rau hauv ob theem.
Thawj - thaum muaj pes tsawg leeg yog nyob ze rau cov hlau ntshiab nrog cov khoom sib nqus. Raws li yog daim hlau ntawm ib leeg-domain thickness tshwm. Thiab lub thib ob theem yog ze rau lub intermetallic compound nyob rau hauv muaj pes tsawg leeg, qhov twg npib tsib xee thiab txhuas muaj tsawg magnetic zog. Nws hloov tawm ib qho system uas tsis yog-sib nqus sib nqus ua ke nrog cov sib nqus sib nqus nrog lub zog loj loj. Tab sis cov hlau no tsis zoo txaus hauv cov khoom sib nqus. Qhov feem ntau yog lwm qhov sib xyaw, alloyed: hlau, npib tsib xee, txhuas thiab tooj liab nrog cob alt rau alloying. Cob alt-free alloys muaj cov khoom sib nqus qis, tab sis lawv pheej yig dua.
Powder hard magnetic material
Cov ntaub ntawv hmoov yog siv rau cov khoom me me tab sis cov hlau nplaum ruaj khov. Lawv yog hlau-ceramic, hlau-yas, oxide thiab micropowder. Cov cermet tshwj xeeb yog qhov zoo. Nyob rau hauv cov nqe lus ntawm magnetic zog, nws yog ib tug me ntsis inferior rau cam khwb cia sawv daws yuav, tab sis me ntsis kim tshaj lawv. Ceramic-hlau hlau nplaum yog tsim los ntawm nias cov hmoov hlau tsis muaj cov khoom siv khi thiab sintering lawv ntawm qhov kub siab heev. Cov hmoov yog sivnrog cov alloys piav saum toj no, nrog rau cov raws li platinum thiab tsawg ntiaj teb hlau.
Raws li cov neeg kho tshuab lub zog, cov hmoov hlau metallurgy yog qhov zoo tshaj plaws rau kev casting, tab sis cov khoom sib nqus ntawm cov hlau nplaum-ceramic hlau nplaum tseem qis dua li cov cam khwb cia. Platinum-raws li cov hlau nplaum muaj qhov muaj zog quab yuam siab heev, thiab qhov tsis muaj qhov ruaj khov heev. Alloys nrog uranium thiab cov hlau tsis tshua muaj hauv ntiaj teb muaj cov ntaub ntawv tseem ceeb ntawm lub zog sib nqus siab tshaj plaws: tus nqi txwv yog 112 kJ ib square meter. Xws li alloys yog tau los ntawm txias nias cov hmoov mus rau lub siab tshaj plaws degree ntawm ceev, ces cov briquettes yog sintered nrog lub xub ntiag ntawm ib tug kua theem thiab casting ntawm ib tug multicomponent muaj pes tsawg leeg. Nws yog tsis yooj yim sua kom sib tov cov Cheebtsam rau xws li ib tug npaum li cas los ntawm yooj yim casting.
Lwm cov khoom siv hlau nplaum nyuaj
Cov ntaub ntawv sib nqus nyuaj kuj suav nrog cov uas muaj lub hom phiaj tshwj xeeb. Cov no yog cov hlau nplaum elastic, plastically deformable alloys, cov ntaub ntawv rau cov ntaub ntawv nqa thiab cov hlau nplaum ua kua. Deformable hlau nplaum muaj cov khoom yas zoo heev, lawv qiv lawv tus kheej zoo kawg nkaus rau txhua yam kev ua haujlwm - stamping, txiav, machining. Tab sis cov hlau nplaum no kim heev. Kunife hlau nplaum ua los ntawm tooj liab, npib tsib xee thiab hlau yog anisotropic, uas yog, lawv yog magnetized nyob rau hauv cov kev taw qhia ntawm dov, lawv yog siv nyob rau hauv daim ntawv ntawm stamping thiab hlau. Vikalloy hlau nplaum ua los ntawm cob alt thiab vanadium yog tsim nyob rau hauv daim ntawv ntawm ib tug high-strength magnetic daim kab xev, raws li zoo raws li hlau. Qhov kev sib xyaw no yog qhov zoo rau cov hlau nplaum me me nrog cov txheej txheem nyuaj tshaj plaws.
Elastic hlau nplaum - ntawm lub hauv paus roj hmab, uasCov muab tub lim yog cov hmoov zoo ntawm cov khoom siv hlau nplaum nyuaj. Feem ntau nws yog barium ferrite. Txoj kev no tso cai rau koj kom tau txais cov khoom ntawm txhua yam duab nrog siab manufacturability. Lawv kuj zoo kawg nkaus txiav nrog txiab, khoov, stamped, twisted. Lawv pheej yig dua. Cov roj hmab sib nqus yog siv los ua cov ntawv sib nqus nco rau cov khoos phis tawj, hauv TV, rau kev kho tshuab. Raws li cov ntaub ntawv nqa, cov khoom sib nqus ua tau raws li ntau qhov kev xav tau. Qhov no yog ib tug high-theem residual induction, ib tug me me nyhuv ntawm tus kheej-demagnetization (txawm li cas los xij, cov ntaub ntawv yuav ploj), tus nqi siab ntawm coercive quab yuam. Thiab txhawm rau pab txhawb cov txheej txheem ntawm kev tshem tawm cov ntaub ntawv, tsuas yog ib qho me me ntawm lub zog no, tab sis qhov kev tsis sib haum xeeb no raug tshem tawm nrog kev pab ntawm thev naus laus zis.
