Magnets

Dab tsi yog Cov Hlau nplaum Permanent?

Permanent Magnet Physics Txhais

Nyob rau theem atomic, cov hlau nplaum ruaj khov tshwm sim los ntawm kev sib txuam ntawm cov khoom sib nqus: cov cheeb tsam microscopic qhov twg pawg ntawm atoms taw qhia lawv lub sijhawm sib nqus hauv tib qho kev taw qhia. Thaum ib qho kev faib ua feem txaus ntawm cov thawj tswj hwm los ntawm cov txheej txheem tsim khoom hu ua "magnetization," cov khoom tsim tawm cov hlau nplaum sab nraud muaj zog txaus rau kev siv.

Peb lub zog tseem ceeb txhais tau tias cov hlau nplaum ruaj khov ua haujlwm

 

Hom Permanent Magnets los ntawm Cov Khoom Siv

Hauv kev tsim cov khoom lag luam, xaiv cov khoom siv hlau nplaum tsis raug yog ib qho kev ua yuam kev ntau tshaj plaws uas tuaj yeem ua. Cov ntawv hauv qab no muab cov txheej txheem txheej txheem ntawm peb pawg tseem ceeb ntawm cov hlau nplaum ruaj khov tam sim no muaj nyob rau hauv kev ua lag luam, nrog rau cov ntaub ntawv sib piv intuitive, nrog lub hom phiaj ntawm kev muab kev txhawb nqa rau koj thaum lub sijhawm xaiv cov khoom.

Neodymium (NdFeB)

GME muab cov hlau nplaum sintered neodymium (NdFeB) hauv qib N35–N52, Hoobkas- ncaj qha nrog OEM / ODM cov duab kev cai, lub ntiaj teb cov khoom siv hlau nplaum ruaj khov.

BHmax Ntau:33-52 : kuv

Max. Ua haujlwm Temp:80℃- 200 degree

Qib Muaj:N35–N52, M, H, SH, UH, EH

Txheej yuav tsum tau:Yog (NiCuNi / Epoxy)

Daim ntawv thov:EV Motors, Cua Turbines, Robotics

MRI Adjacent, Consumer Electronics.

Tshawb nrhiav ntau NdFeB

Samarium Cobalt (SmCo)

GME tsim samarium cobalt (SmCo) hlau nplaum rau aerospace, tiv thaiv, thiab downhole daim ntaub ntawv uas yuav tsum tau uncompromising siab -kub kev ua tau zoo.

(BHmax) Ntau:16-32 IB

Ua haujlwm kub siab tshaj plaws:250℃- 350 degree

Muaj Qib:Sm2Co5, Sm2Co17

Coating Requirement:Feem ntau yuav tsum tsis muaj txheej txheej

Daim ntawv thov:Aerospace, Downhole Roj & Gas Tshawb Fawb, Kev Tiv Thaiv Sensors, Satellite Systems.

Tshawb nrhiav ntau SmCo

 

 

Alnico

GME muab Alnico hlau nplaum los ntawm ob qho tib si casting thiab sintering.

Cov Khoom Siv Hluav Taws Xob (BHmax) Ntau Yam:1.5 – 11.00 Nws

Ua haujlwm kub siab tshaj plaws:540 degree

Kub Coefficient (Br):-0.02% /℃(qis tshaj)

Kev tsim khoom:Casting los yog Sintering

Daim ntawv thov:Guitar Pickups, Aerospace Instrumentation, Flow Meters,High -Tsub Sensors.

Tshawb nrhiav Alnico ntxiv

 

Yuav ua li cas xaiv cov khoom siv hlau nplaum ruaj khov

Kev xaiv cov khoom siv yog qhov kev txiav txim siab tseem ceeb tshaj plaws hauv kev yuav khoom hlau nplaum. Qhov kev xaiv tsis ncaj ncees raug nqi koj hauv kev rov ua haujlwm dua, kev lees paub kev lees paub, thiab kev ua haujlwm tsis ua haujlwm. Siv qhov kev txiav txim siab matrix

Piv txwv thiab muaj kev siv ntawm Permanent Magnets

Los ntawm cov neeg siv khoom siv niaj hnub mus rau cov tshuab tseem ceeb hauv kev lag luam, cov hlau nplaum ruaj khov yog lub hauv paus ntawm lub ntiaj teb niaj hnub no txav mus los, kev xav, thiab tsim lub zog.

Smartphone Speakers

NdFeB disc hlau nplaum hauv pob ntseg hloov cov cim rau lub suab.

Hard Disk Drives

NdFeB arc hlau nplaum txoj hauj lwm nyeem / sau taub hau nrog nanometer precision.

EV Traction Motors

High-qib NdFeB (SH/UH) arc hlau nplaum hauv rotor sib dhos.

Guitar Pickups

Alnico 2/5 rau vintage suab; NdFeB rau niaj hnub siab -output.

Lub tub yees Qhov Rooj Seals

Flexible ferrite strips tuav lub airtight kaw yam tsis muaj latches.

Headphones & Earbuds

NdFeB tsav tsheb xa cov lus teb dav dav hauv daim ntawv cog lus.

E-Bike Hub Motors

NdFeB arc hlau nplaum rau ntsiag to, muaj zog propulsion.

MagSafe / Wireless Charging

NdFeB nplhaib arrays rau kev sib tw thiab lub zog hloov pauv.

Magnetic Door Catches

Lub lauj kaub hlau nplaum nyob rau hauv cov khob steel muab cov cuab yeej - pub dawb kaw.

Hluav taws xob txhuam hniav
NdFeB hlau nplaum nyob rau hauv ntsiag to brushless motors.

Yuav Ua Li Cas Permanent Magnets Ua Haujlwm?

Cov hlau nplaum tas mus li ua haujlwm vim tias lawv cov khoom sib nqus sab hauv yog ua raws. Thaum cov domains taw tes rau tib qhov kev taw qhia, cov khoom tsim ib qho chaw sib nqus nyob ib ncig ntawm nws tus kheej. Qhov chaw sib nqus no tuaj yeem nyiam cov ntaub ntawv ferromagnetic thiab cuam tshuam nrog lwm cov khoom sib nqus.
 

Magnetic Domain Theory thiab Field Generation

Txhua atom nrog unpaired electrons ua raws li ib tug me me sib nqus dipole, ib tug microscopic bar magnet. Nyob rau hauv ntau cov ntaub ntawv, cov atomic dipoles taw tes rau hauv random cov lus qhia thiab tshem tawm ib leeg, ua tsis muaj net magnetic teb.

Nyob rau hauv cov ntaub ntawv ferromagnetic (hlau, npib tsib xee, cobalt, thiab lawv cov alloys), quantum mechanical exchange interactions quab yuam cov neeg nyob sib ze lub sij hawm atomic kom sib npaug. Qhov kev sib xyaw ua ke no tsim cov khoom sib nqus: cov cheeb tsam feem ntau 10-100 micrometers loj qhov twg ntau lab ntawm cov atoms sib sau ua ke rau tib qho kev taw qhia.

Ua ntej magnetization: Cov npe muaj nyob, tab sis lawv taw tes rau hauv cov lus qhia random, nrog rau qhov chaw sab nraud ntawm xoom.

Tom qab magnetization: Ib qho chaw sab nraud saum toj kawg nkaus ntawm cov khoom siv saturation pib quab yuam cov thawj coj kom ua raws li cov net sab nraud teb, muaj zog thiab tsis tu ncua.

Thaum ua tiav, cov phab ntsa sau tsis tuaj yeem thim rov qab lawv txoj kev taw qhia yooj yim vim yog cov khoom siv magnetocrystalline anisotropy. Qhov no yog qhov ua rau NdFeB hlau nplaum muaj zog heev: Nd₂Fe₁₄B siv lead ua qauv muaj zog anisotropy tshwj xeeb.

Nkag siab Coercivity, Remanence, thiab BH Curve

BH nkhaus yog cov cuab yeej tseem ceeb rau kev qhia thiab sib piv cov hlau nplaum ruaj khov. Txhua daim ntawv teev cov hlau nplaum siv nws.

Kev sib piv: Cov hlau nplaum ruaj khov vs. Cov hlau nplaum ib ntus vs. Cov hlau nplaum

Puas Yog Cov Hlau nplaum tas mus li poob lawv cov hlau nplaum dhau sijhawm?

This is one of the most common questions from engineers specifying magnets for long-life applications. The short answer: a well-specified permanent magnet, properly handled, will retain >95% ntawm nws cov thawj flux ceev tau ntau xyoo, qee zaum tshaj 100 xyoo.

Plaub qhov laj thawj ntawm Demagnetization

1. Qhov kub thiab txias (feem ntau)

Tshaj qhov siab tshaj qhov ua haujlwm kub ua rau ib nrab, muaj peev xwm hloov tsis tau flux poob. Standard N-qib NdFeB muaj max ntawm 80℃; EH-qib ncua qhov no mus rau 200℃. Ib txwm ua haujlwm tsawg kawg 30℃qis dua qhov ntsuas siab tshaj plaws.
2. Sib Nqus Fields

Cov teb sab nraud tawm tsam cov hlau nplaum lub teb thiab tshaj nws qhov kev sib koom ua ke (Hci) tuaj yeem ua ib feem lossis tag nrho demagnetize nws. Qhov no yog vim li cas siab -Hci qib (SH, UH, EH) yog qhov tseem ceeb hauv kev siv lub cev muaj zog.
3. Lub cev poob siab thiab kev vibration

Kev cuam tshuam loj heev tuaj yeem cuam tshuam cov phab ntsa ntawm qhov sib dhos. Ntau qhov kev txhawj xeeb rau Alnico (qis coercivity) dua li NdFeB lossis SmCo. Kov cov hlau nplaum loj (50mm +) nrog cov cuab yeej sib cais tshwj xeeb.
4. Corrosion (NdFeB Specific)

Uncoated NdFeB hauv cov av ntub lossis ntsev- tej thaj chaw tshuaj tsuag yuav corrode thiab poob kev ua haujlwm sib nqus. Nco ntsoov qhia cov txheej txheem kom raug (NiCuNi, Epoxy, Kub) raws li koj qhov chaw ua haujlwm.

Kev cai Magnet Shapes & OEM Manufacturing

GME tsim cov hlau nplaum ruaj khov los ntawm 2D / 3D kos duab hauv ib qho duab: disc, thaiv, nplhaib, arc, countersunk, lossis tag nrho cov kev cai profile.

Cov duab:Disc / Lub tog raj kheej Magnet
Cov ntawv thov raug:Sensors, hais lus, khoom siv kho mob, lauj kaub hlau nplaum
Cov ntaub ntawv muaj: NdFeB, SmCo, Alnico, Ferrite

Cov duab:Thaiv / Rectangle Magnet
Daim ntawv thov:Sib nqus chucks, tuav fixtures, motor assemblies
Cov ntaub ntawv muaj:NdFeB, SmCo, Alnico, Ferrite

Cov duab:Ntiv nplhaib / Annular Magnet
Daim ntawv thov:Bearings, loudspeakers, teb encoders
Cov ntaub ntawv muaj:NdFeB, SmCo, Ferrite

Cov duab:Arc / Segment Magnet
Daim ntawv thov:Lub cev muaj zog rotors, generator sib dhos, cua turbines
Cov ntaub ntawv muaj:NdFeB, SmCo, Ferrite

Cov duab:Countersunk Magnet
Daim ntawv thov:Mechanical fastening, rooj tog, fixtures
Cov ntaub ntawv muaj:NdFeB, Ferrite

Cov duab:Custom Magnet
Daim ntawv thov:Ib 2D / 3D kos duab txhua yam hauv cov khoom txwv
Cov ntaub ntawv muaj:NdFeB, SmCo

Kev xaiv txheej txheej

NdFeB hlau nplaum xav tau kev tiv thaiv saum npoo hauv ntau daim ntawv thov. Cov txheej koj xaiv cuam tshuam rau corrosion kuj, kev khiav hauj lwm kub ntau, hluav taws xob conductivity, thiab nqi.

Xa koj cov kev xav tau

Yuav Ua Li Cas Thiaj Li Kev Cai Magnets los ntawm GME:

Xa koj daim duab (DXF/STEP/PDF) lossis piav qhia koj qhov yuav tsum tau ua.
Tau txais kev pom zoo cov ntaub ntawv + DFM tawm tswv yim hauv 24 teev.
Pom zoo qauv - ntau lawm hauv 15-30 hnub.

Quality Assurance: Testing and Compliance Standards

GME's nyob rau hauv -tsev QA lab kuaj txhua cov khoom tsim tawm tawm tsam IEC 60404-5 (coercivity), IEC 60404-8-1 (remanence), thiab ASTM A977 (BHmax). Txheej kev ntseeg tau raug txheeb xyuas los ntawm ISO 9227 kev ntsuas ntsev ntsev (24-200h nyob ntawm hom txheej) thiab ISO 2409 adhesion cross-cut. Tag nrho cov ntaub ntawv seem yog nkag mus rau ± 0.05mm kam rau ua. ISO 9001: 2008 tau ntawv pov thawj. CE thiab RoHS cov ntaub ntawv muaj rau txhua tus qauv khoom kab.

Hauv -Kev Tswj Xyuas Zoo

Txhua pawg tsim khoom ntawm peb lub chaw Xiamen mus dhau los ntawm cov ntaub ntawv sau tseg, ntau- txheej txheem tswj kev ua tau zoo, tsis yog kev tshuaj xyuas zaum kawg nkaus xwb.

Raw Material Verification Txhua cov khoom NdFeB thiab SmCo alloy batch raug txheeb xyuas los ntawm XRF muaj pes tsawg leeg tsom xam ua ntej nws nkag mus rau ntau lawm. Particle loj tis thiab ntom yog ntsuas tom qab-sintering kom paub meej tias cov batch raws li qib specification ua ntej magnetization.

Magnetic Performance Testing. Qhov no yog qhov uas cov neeg muag khoom feem ntau txiav cov ces kaum. GME kuaj txhua pawg ntau lawm, tsis yog cov qauv xwb, tawm tsam cov hauv qab no:

Txheej & Kev Ntsuam Xyuas Kev Ntseeg:Cov hlau nplaum uas kuaj tau zoo magnetic tab sis ua tsis tiav hauv daim teb vim yog txheej txheej delamination tseem yog cov khoom tsis raug. GME siv cov txheej txheem pov thawj hauv qab no:

Ntsej Tsuag Test

Txheej Adhesion Test

Thermal Cycling Test

High Humidity Test

Daim ntawv pov thawj Txheej txheem cej luam

CE

RoHS Test Report

SGS

ISO 14001: 2004 Daim ntawv pov thawj

ISO 9001: 2008 Daim ntawv pov thawj

Kev ruaj ntseg tuav thiab Shipping Cov Lus Qhia rau Cov Hlau nplaum muaj zog

"Cov hlau nplaum muaj zog, tshwj xeeb tshaj yog neodymium, yuav tsum tau ua tib zoo tuav thiab khaws cia kom muaj kev nyab xeeb rau cov neeg ua haujlwm thiab cov khoom siv.

Yuav Ua Li Cas Ua Tau Zoo Siv Lub Zog Neodymium Magnets

Cov hlau nplaum muaj zog NdFeB muaj peev xwm ua rau raug mob hnyav thiab khoom siv puas tsuaj. Cov lus qhia hauv qab no yog qhov yuav tsum tau ua kom muaj kev nyab xeeb:

Kev Tiv Thaiv Tus Kheej:

✅ Ib txwm hnav tawv

cards, hard drives, thiab magnetic media (cov ntaub ntawv mus tas li tsis muaj kev pheej hmoo).

Kev sib cais thiab tuav: Cov hnab looj tes kws kho mob; hlau nplaum chips yog ntse thiab tuaj yeem lacerate daim tawv nqaij.

✅ Hnav qhov muag tiv thaiv thaum sib cais cov hlau nplaum saum N45 qib lossis siab dua 50mm loj.

✅ Khaws cov hlau nplaum kom deb ntawm cov pacemakers, cochlear implants, thiab lwm yam khoom siv hluav taws xob kho mob (tsawg kawg 30cm).

✅ Khaws cia deb ntawm credit cards, hard drives, thiab magnetic media (cov ntaub ntawv yuav poob mus tas li).

Kev sib cais thiab kev tuav pov hwm:

❌ Tsis txhob cia ob lub hlau nplaum muaj zog ua ke. Qhov cuam tshuam tuaj yeem tawg cov hlau nplaum thiab xa cov khoom tawg ntawm qhov nrawm nrawm.

✅ zawv zawg hlau nplaum sib nrug dua li rub ncaj qha yuav tsum muaj zog tsawg thiab tiv thaiv snapping.

✅ Rau cov hlau nplaum saum toj 80mm: siv cov cuab yeej sib cais tshwj xeeb lossis cov nplooj ntoo tawv tawv; tsis txhob siv tes liab qab.

✅ Khaws cov hlau nplaum nrog cov duab los yog yas spacers ntawm cov chav nyob thiab hauv ib lub hnab ntawv lossis cov tais.

Environmental Storage:

Khaws rau hauv qhov chaw qhuav, qhov kub thiab txias -tswj ib puag ncig (10–30℃,<60% RH).

Tsis txhob khaws cia ze rau qhov muaj zog sib nqus teb los yog cov qauv ferromagnetic loj.

Khaws NdFeB hlau nplaum nyob rau hauv lawv cov thawj anti{0}}corrosion ntim kom txog rau thaum siv.

Great Magtech (Xiamen) Electric Co., Ltd yog ib qho ntawm cov kws tshaj lij hlau nplaum manufacturers thiab lwm tus neeg nyob hauv Suav teb. Txais tos rau kev lag luam wholesale hlau nplaum los ntawm peb lub hoobkas.