Hauv cov khoom siv hluav taws xob thiab cov khoom sib nqus, ferrite, ua cov khoom siv tseem ceeb, yog siv dav hauv ntau yam khoom siv hluav taws xob. Txawm li cas los xij, ntau tus engineers thiab cov neeg yuav khoom feem ntau tsis meej pem thaum ntsib kev xaiv ntawm "soft ferrite" thiab "hard ferrite". Txawm hais tias ob cov ntaub ntawv no muaj cov npe zoo sib xws, lawv muaj qhov sib txawv loj hauv kev ua haujlwm thiab kev siv. Kev nkag siab txog qhov sib txawv no yog qhov tseem ceeb rau kev txhim kho cov khoom siv hluav taws xob zoo, txhim kho kev siv hluav taws xob, thiab txo cov nqi. Kab lus no yuav tshawb txog qhov sib txawv tseem ceeb ntawm cov mos ferrites thiab tawv ferrites, txheeb xyuas lawv qhov zoo thiab qhov tsis zoo, thiab muab cov tswv yim xaiv cov tswv yim los pab koj txiav txim siab xaiv cov khoom zoo raws li koj qhov kev thov tshwj xeeb.
Lub ntsiab lus ntawm Soft Ferrite
Cov ntaub ntawv sib nqus mos uas tsis muaj coercivity, siab sib nqus permeability, thiab siab resistivity yog tsim los ntawm sintering hlau oxide (Fe2O2) nrog hlau oxides xws li manganese, zinc, thiab nickel. Nws cov yam ntxwv yog tias nws yooj yim rau magnetize thiab demagnetize nyob rau hauv alternating magnetic teb, muaj me me hysteresis poob, thiab yog haum rau ua hauj lwm nyob rau hauv siab - zaus.
Hom Hom
1. Manganese Zinc Ferrite
Nws muaj qhov sib nqus permeability siab thiab qis coercivity, thiab tsim nyog rau qis - zaus (kHz range) siab sib nqus induction siv zaus, xws li fais fab transformers, inductors, thiab hom chokes. Nws qhov tsis zoo yog qhov tsis muaj zog thiab siab siab - zaus poob.
2. Nickel-Zinc Ferrite
Nrog kev tiv thaiv siab thiab zoo heev - cov yam ntxwv zaus, Ni-Zn ferrite yog tsim rau MHz band anti-EMI (electromagnetic cuam tshuam) li, RF transformers, thiab kav hlau txais xov cores. Piv nrog rau Mn-Zn cov ntaub ntawv, Ni-Zn ferrite muaj qis dua ntawm cov zaus siab.
3. Mg-Zn Ferrite
Muaj qee yam sib nqus permeability thiab siab tiv taus, thiab yog tsim rau nruab nrab thiab siab zaus daim ntaub ntawv, xws li cov khoom siv microwave thiab qee cov RF inductors. Nws muaj qhov ntsuas kub zoo, tab sis nws cov khoom sib nqus feem ntau qis dua cov Mn-Zn thiab Ni-Zn.
4. Tooj-Zinc Ferrite
Copper-zinc ferrite muaj cov khoom sib nqus hloov tau thiab tsim nyog rau qis- daim ntawv thov poob ntawm cov zaus tshwj xeeb, xws li siab - zaus inductors, sensors, thiab cov ntaub ntawv sib nqus. Nws cov nqi qis dua, tab sis nws qhov sib nqus permeability feem ntau tsis zoo li Mn-Zn thiab Ni-Zn cov ntaub ntawv.
Daim ntawv thov ntawm Soft Ferrite
Electronic Transformers thiab Inductors:Raws li cov khoom siv tseem ceeb, cov khoom siv hlau nplaum yog siv los txhim kho lub zog hloov pauv ntawm cov khoom siv hluav taws xob thiab cov inductors thaum ua tiav miniaturization thiab kev ua haujlwm siab.
Electromagnetic CompatibilityComponents:Los ntawm absorbing los yog suppressing electromagnetic cuam tshuam, cov khoom sib nqus xyuas kom meej tias cov khoom siv hluav taws xob ua tau raws li EMC cov qauv thiab txhim kho kev ruaj ntseg.
Wireless ChargingTechnology:Raws li lub zog sib kis nruab nrab, cov khoom sib nqus ua kom zoo dua electromagnetic coupling efficiency thiab txhawb kev txhim kho ntawm wireless charging daim ntawv thov xws li smartphones thiab hluav taws xob tsheb.
Kev sib txuas lusEkhoom siv:Hauv cov chaw nres tsheb hauv paus, kav hlau txais xov, thiab lwm yam khoom siv, cov khoom siv hlau nplaum txhawb siab -ntau zaus ua cov teeb liab, txhim kho kev sib txuas lus zoo thiab cov ntaub ntawv xa mus.
Automotive Ehluav taws xobScov txheej txheem:Siv nyob rau hauv motors, sensors, thiab fais fab tswj modules los pab lub tsheb fais thiab ntse tsav technologies khiav hauj lwm zoo.
Kev tsim cov Soft Ferrites
Raws MaterialPkev kho mob:Mos ferrite ntau lawm yuav tsum muaj siab -purity hlau oxide (Fe₂O₃) thiab hlau oxides xws li manganese thiab zinc, uas yuav tsum tau pre- kho los ntawm proportioning, pob milling, los yog tshuaj tsuag kom qhuav kom huv si muaj pes tsawg leeg.
Ua ntej -Ssib tham:Cov sib tov yog ua ntej-sintered ntawm 800℃~ 1000℃los tsim ib tug spinel precursor, txo sintering shrinkage, thiab ces crushed thiab refined.
Moulding:Cov hmoov yog molded los ntawm qhuav nias, txhaj tshuaj molding, thiab lwm yam. Lub siab yog tswj kom tsis txhob tawg. Cov duab tsis yooj yim xav tau kev pab ntawm binders.
Sintering:Lub cev ntsuab yog sintered ntawm 1100℃~ 1300 degree, optimizing lub cua sov, rwb thaiv tsev, thiab cua txias txheej txheem los xyuas kom meej densification thiab siv lead ua qauv.
Ncej -Processing thiabTkev txiav txim:Sintered qhov chaw yog hauv av, kuaj rau cov khoom sib nqus, thiab kuaj xyuas cov microscopically, thiab qee qhov yuav tsum tau muab tshuaj txhuam lossis txheej.
Ntim thiab Storage:Cov khoom tiav tau ntim rau hauv cov dej noo- cov ntaub ntawv pov thawj, khaws cia rau hauv ib puag ncig qhuav, thiab cov khoom ntim tau raug kaw kom paub meej txog kev taug qab.
Dab tsi yog qhov zoo ntawm Soft Ferrites?
Raws li cov khoom siv hlau nplaum tseem ceeb, nws muaj ntau yam kev siv hauv cov khoom siv hluav taws xob thiab hluav taws xob. Nws qhov zoo yog feem ntau cuam tshuam nrog cov hauv qab no:
1. SiabMhlau nplaumPermeability
Mos ferrite muaj siab sib nqus permeability, uas txhais tau hais tias nws tuaj yeem mloog zoo thiab coj cov kab sib nqus ntawm lub zog hauv qhov chaw sib nqus. Cov cuab yeej no ua rau nws zoo heev hauv kev siv xws li transformers, inductors, thiab electromagnetic shielding, uas tuaj yeem txhim kho qhov kev ua tau zoo ntawm kev sib nqus hluav taws xob thaum txo qis zog.
2. TsawgKev quab yuam
Mos ferrite muaj coercivity tsawg, uas txhais tau hais tias nws magnetization kev taw qhia hloov tau yooj yim nrog rau sab nraud magnetic teb thiab muaj ib tug me me remanence. Cov yam ntxwv no ua rau nws tsim nyog rau siab - zaus hloov circuits thiab cov khoom siv ua cov teeb liab, vim tias kev sib koom tes qis tuaj yeem txo qis hysteresis poob thiab txhim kho cov lus teb ceev thiab lub zog ntawm cov khoom siv.
3. Zaus teb
Mos ferrite tseem tuaj yeem tswj cov khoom sib nqus ruaj khov nyob rau hauv qhov siab - ib puag ncig zaus, nrog kev tiv thaiv siab thiab tsis tshua muaj eddy tam sim no poob. Yog li ntawd, nws yog dav siv nyob rau hauv RF pab kiag li lawm, tiv thaiv - electromagnetic cuam tshuam Cheebtsam, thiab siab - zaus transformers los xyuas kom meej stability thiab kev cia siab ntawm cov teeb liab kis tau tus mob.
4. Nqis -Kev ua tau zoo
Piv nrog rau lwm cov khoom sib nqus, cov ferrite mos muaj tus nqi qis dua thiab yooj yim rau kev ua ntau yam duab. Nws tus nqi siab -kev ua tau zoo piv ua rau nws siv cov khoom siv sib nqus hauv cov neeg siv khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab kev sib txuas lus, tshwj xeeb tshaj yog tsim rau loj - cov kev xav tau ntau lawm.
Txhais ntawm Hard Ferrite
Hard ferrite yog ib hom khoom siv hlau nplaum ruaj khov nrog kev sib zog siab thiab cov khoom siv hluav taws xob sib nqus siab. Nws belongs rau magnetic oxide ceramics. Nws cov khoom tseem ceeb suav nrog alkaline ntiaj teb hlau xws li barium thiab strontium, thiab ferric oxide. Nws cov qauv siv lead ua feem ntau yog hexagonal magnetoplumbite hom, nrog siab magnetocrystalline anisotropy, yog li qhia muaj zog tiv thaiv -demagnetization muaj peev xwm.
Hom Hard Ferrites
1. Barium Ferrite
Barium ferrite yog qhov nyuaj tshaj plaws ferrite, nrog rau cov tshuaj formula BaFe₁₂O₁₉, thiab muaj siab coercivity (150-300 kA / m) thiab zoo corrosion kuj. Nws yog sintered siv cov txheej txheem ceramic, yog tsawg- nqi, thiab yog dav siv nyob rau hauv cov xwm txheej xws li hais lus, lub cev muaj zog me me, thiab cov hlau nplaum hauv tsev, tab sis muaj cov khoom sib nqus tsawg thiab yooj yim demagnetized ntawm qhov kub thiab txias.
2. Strontium Ferrite
Strontium ferrite yog ib qho kev hloov kho tshiab ntawm barium ferrite, nrog ntau dua coercivity (300-400 kA / m), zoo remanence thiab kub stability, thiab Curie kub txog li 470 degree. Txawm hais tias tus nqi siab dua me ntsis, nws tau maj mam dhau los ua cov khoom siv hlau nplaum ruaj khov rau lub cev muaj zog, cov khoom sib nqus sib nqus, thiab cov ntawv siv hluav taws xob cua vim nws qhov kev ua tau zoo tag nrho.
3. Kev sib khiFerrite
Bonded ferriteyog tsim los ntawm kev sib xyaw ferrite hmoov nrog resin / roj hmab thiab nias nws, thiab tuaj yeem ua rau cov duab nyuaj lossis cov hlau nplaum hloov tau. Nws cov khoom sib nqus yog qis dua li cov sintered ferrite, tab sis nws yog ib qho yooj yim rau huab hwm coj - tsim thiab feem ntau yog siv rau hauv cov khoom uas xav tau siab, xws li tshuab luam ntawv rollers thiab sib nqus thaj ua rau thaj.
Kev siv Hard Ferrite
Motors thiab Gcov tshuab hluav taws xob:Cov khoom siv hauv tsev, cov khoom siv tsheb. Nws cov coercivity siab thiab tus nqi qis ua rau nws zoo tagnrho rau me me thiab nruab nrab - motors loj, nrog rau me me cua turbines thiab maus taus magneto.
Electronics thiab Ekev caiAcov khoom siv: Hard ferrite feem ntau siv nyob rau hauv lub magnetic circuit system ntawm hais lus, headphones, thiab buzzers los muab ib tug ruaj khov magnetic teb. Tsis tas li ntawd, nws kuj yog siv rau hauv cov hlau nplaum thiab cov sensors hauv cov khoom siv hluav taws xob xws li TV thiab xov tooj cua kom tau raws li cov kev xav tau ntawm tus nqi qis thiab kev tiv thaiv corrosion.
Automotive Kev Lag Luam:Ntau qhov chaw hauv tsheb cia siab rau cov ferrites nyuaj, xws li lub cev muaj zog, ABS sensors, thiab roj twj tso kua mis motors. Nws qhov kub thiab txias tsis kam thiab tiv thaiv - cov khoom laus ua rau nws haum rau ntev - ua haujlwm nyob rau hauv ib puag ncig hnyav thaum txo cov nqi tsim khoom.
Cov neeg siv khoom Pcov khoom: Hard ferrites feem ntau pom muaj nyob rau hauv cov khoom ua si, sib nqus buckles (lub hnab, lub hnab ntim khoom), cov hlau nplaum tub yees, thiab lwm yam khoom siv txhua hnub. Vim tias lawv tsis yog - tshuaj lom, corrosion- tiv taus, thiab pheej yig, lawv tsim nyog rau cov neeg siv khoom lag luam loj.
Cov kauj ruam ntau lawm ntawm Hard Ferrite
Raws MaterialPkev kho mob:Kev tsim cov ferrite nyuaj ua ntej yuav tsum tau npaj cov ntaub ntawv tsim nyog, feem ntau suav nrog hlau oxide thiab strontium carbonate lossis barium carbonate. Cov ntaub ntawv nyoos no yuav tsum tau soj ntsuam nruj me ntsis thiab sib faib kom ntseeg tau tias cov tshuaj muaj pes tsawg leeg ua tau raws li qhov yuav tsum tau ua thiab sib xyaw ua ke kom ntseeg tau tias qhov sib xws ntawm cov tshuaj tiv thaiv tom qab.
Ua ntej -Ssib tham:Cov khoom sib xyaw ua ke yog ua ntej-sintered ntawm qhov kub thiab txias, feem ntau yog nruab nrab ntawm 1000℃thiab 1300 degree, kom ua rau lub zog theem ntawm cov khoom siv raw los tsim cov theem tseem ceeb ntawm hard ferrite. Cov txheej txheem ua ntej - sintering pab ua kom cov reactivity ntawm cov khoom thiab txo cov shrinkage thaum lub sij hawm sintering tom ntej.
Zoo Grinding:Cov khoom ua ntej- hlawv cov khoom yuav tsum tau ua kom zoo, feem ntau yog los ntawm pob zeb los yog xuab zeb milling, txhawm rau txhawm rau hauv micron - cov khoom me me. Cov txheej txheem sib tsoo zoo tuaj yeem ua kom zoo dua qhov kev faib tawm me me, txhim kho qhov sib xws ntawm cov khoom, thiab txhim kho cov yas thaum lub sij hawm molding.
Moulding:Cov hmoov av hmoov zoo yog nias rau hauv cov duab, feem ntau yog siv cov hlau nplaum sib nqus kev taw qhia xovxwm tshuab los ua kom cov ferrite hais nyob rau hauv ib qho kev taw qhia los txhim kho cov khoom sib nqus. Txoj kev molding tuaj yeem ua kom qhuav, nias ntub, lossis isostatic nias, nyob ntawm seb cov khoom zoo li cas thiab kev ua haujlwm.
Sintering:Lub cev ntsuab tsim yog sintered ntawm qhov kub thiab txias (feem ntau yog 1100℃~ 1300 degree) los tsim cov microstructure ntom ntom ntawm cov khoom thiab txhim kho cov khoom siv dag zog thiab cov khoom sib nqus ntawm cov khoom. Cov cua kub thiab lub sij hawm tuav yuav tsum tau tswj thaum lub sij hawm sintering txheej txheem kom tsis txhob deformation los yog tawg.
Kev ua haujlwm thiab Tkev kho mob:Sintered nyuaj ferrite yuav xav tau kev siv tshuab, xws li txiav, sib tsoo, lossis polishing, kom ua tiav qhov yuav tsum tau muaj qhov tseeb thiab qhov chaw zoo. Qee cov khoom lag luam kuj xav tau annealing kom tshem tawm cov kev ntxhov siab sab hauv thiab txhim kho cov khoom sib nqus.
Magnetization thiab Tkev txiav txim:Hard ferrite yuav tsum tau magnetized nyob rau hauv ib tug muaj zog magnetic teb kom tau ruaj khov magnetic zog. Kev soj ntsuam nruj yog tom qab ntawd ua tiav, suav nrog kev ntsuas kev ua haujlwm sib nqus, kev tshuaj xyuas qhov ntev, thiab kev tshuaj xyuas qhov pom kom ntseeg tau tias cov khoom ua tau raws li tus qauv yuav tsum tau ua.
Dab tsi yog Qhov Zoo ntawm Hard Ferrites?
Qhov zoo ntawm hard ferrite feem ntau suav nrog cov hauv qab no, uas ua rau nws siv dav hauv ntau qhov chaw.
1. Siab Coercivity
Hard ferrite muaj kev sib zog siab (feem ntau yog 1000 ~ 4000 kA / m), uas txhais tau hais tias nws nyuaj rau demagnetize thiab tsim nyog siv rau hauv qhov muaj zog rov qab sib nqus teb lossis qhov chaw ua haujlwm dynamic.
2. TsawgNqi
Cov khoom siv raw yog cov hlau, strontium, lossis barium, thiab tsis muaj cov khoom kim heev hauv ntiaj teb. Yog li, tus nqi qis dua li cov hlau nplaum tsis tshua muaj hauv ntiaj teb xws li neodymium hlau boron lossis samarium cobalt, ua rau nws tsim nyog rau daim ntawv thov loj -.
3. ZooThuab taisKev ruaj ntseg
Kev khiav hauj lwm kub ntau yog qhov dav (-40℃rau +250 degree), thiab cov khoom sib nqus faus tsawg dua ntawm qhov kub siab. Qhov kub coefficient yog qis (qhov kub coefficient ntawm remanence Br yog hais txog -0.2% / degree), uas yog haum rau ib puag ncig nrog loj kub hloov.
4. Muaj zogCorrosionKev tiv thaiv
Ferrite nws tus kheej yog cov khoom siv ceramic uas tiv taus oxidation, ya raws, thiab corrosion, thiab feem ntau tsis xav tau txheej txheej tiv thaiv zoo li NdFeB.
Mos Ferrite vs Hard Ferrite
Mos ferrites muaj kev sib koom tes qis thiab yooj yim hlau nplaum, ua rau lawv haum rau cov khoom siv ceev ceev xws li siab - zaus transformers.
Hard ferrites muaj siab coercivity thiab muaj zog remanence thiab yog feem ntau siv nyob rau hauv tas mus li hlau nplaum motors thiab hais lus. Qhov sib txawv tseem ceeb yog qhov muag ferrites muaj qhov poob qis, thiab cov ferrites nyuaj muaj cov hlau nplaum ruaj khov dua. Hauv qab no yog kev sib piv ntawm cov ntaub ntawv, kev ua tau zoo, thiab kev siv.
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Nta / Classification |
Mos Ferrite |
Hard Ferrite |
|
Kub stability |
General (Mn{0}}Zn yog rhiab rau qhov kub thiab txias) |
Zoo heev (siab kub tiv taus mus txog 450℃lossis siab dua) |
|
Yam khoom siv |
Manganese zinc ferrite (Mn-Zn), nickel zinc ferrite (Ni-Zn) |
Barium ferrite (BaFe₁₂O₁₉), strontium ferrite (SrFe₁₂O₁₉) |
|
Hysteresis Ioop uaCov duab |
Cov duab nqaim thiab ntev (yooj yim rau magnetize thiab demagnetize) |
Cov duab plaub dav (siab remanence, nyuaj rau demagnetize) |
|
Daim ntawv thov tseem ceeb |
High zaus transformers, inductors, EMI suppression cores, thiab RF li |
Cov hlau nplaum tas mus li (hais lus, lub cev muaj zog, sib nqus sib nqus, sib nqus buckles) |
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Nqi |
Nruab nrab (nyob ntawm cov khoom xyaw thiab txheej txheem) |
Tsawg (cov khoom siv pheej yig, haum rau loj- nplai ntau lawm) |
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Ntau zaus |
Ntau zaus (kHz ~ MHz, Ni-Zn tuaj yeem ncav cuag GHz) |
Tsis haum rau siab frequencies (tsuas yog siv rau static magnetic teb) |
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Microsstructural Properties |
Cov phab ntsa sib nqus tau yooj yim txav thiab muaj anisotropy tsawg |
Sib nqus domains yog pinned nrog siab anisotropy |
Qhov twg yog qhov tsim nyog rau koj, Mos Ferrite lossis Hard Ferrite?
Koj yuav tsum xub qhia meej txog koj daim ntawv thov scenario, vim hais tias cov yam ntxwv ntawm ob yog txawv kiag li.
Txheeb xyuas cov kev xav tau ntawm daim ntawv thov
Ua ntej, txiav txim siab lub hom phiaj ntawm cov khoom siv. Yog hais tias koj xav tau ib tug siab - zaus transformer, inductor, los yog electromagnetic shielding uas yuav tsum tau ceev magnetization reversal thiab tsawg poob, mos ferrite yog nyiam; yog tias nws siv rau hauv cov hlau nplaum ruaj khov, lub cev muaj zog, cov neeg hais lus, thiab lwm lub sijhawm uas yuav tsum muaj lub zog sib nqus thiab ruaj khov, xaiv cov ferrite nyuaj.
Tsom ntsoov rau Magnetic Performance Parameters
Mos ferrites yuav tsum muaj siab sib nqus permeability, tsis tshua muaj coercivity, thiab qis hysteresis poob los xyuas kom meej lub zog kis tau tus mob; nyuaj ferrites xav tau siab coercivity, siab remanence, thiab siab sib nqus zog khoom los xyuas kom meej muaj zog thiab ruaj khov hlau nplaum.
Xaiv hom khoom zoo
Mos ferrites feem ntau siv manganese -zinc lossis nickel-zinc ferrites. Manganese-zinc yog haum rau nruab nrab thiab qis zaus (<1 MHz), while nickel-zinc is suitable for high frequencies (>1 MHz). Hard ferrites feem ntau siv barium lossis strontium ferrites, ntawm cov strontium ferrite muaj kev ua tau zoo dua tab sis kim dua.
Xav txog qhov chaw ua haujlwm
Ntsuam xyuas qhov kub, av noo, thiab mechanical zog xav tau. Mos ferrites yog rhiab rau qhov kub thiab txias, yog li koj yuav tsum xaiv cov mis nrog qhov kub thiab txias; tawv ferrites yog corrosion heev-resistant, tab sis lawv yog nkig thiab yuav tsum tau tiv thaiv los ntawm kev co hnyav los yog poob siab.
Nqi thiab Supply Factors
Mos ferrite yog ib qho yooj yim rau txheej txheem thiab muaj tus nqi qis, ua rau nws haum rau huab hwm coj- tsim cov khoom siv hluav taws xob. Hard ferrite tej zaum yuav kim dua vim lub ntiaj teb tsis tshua muaj lossis cov txheej txheem tshwj xeeb, yog li kev ua haujlwm thiab kev siv nyiaj yuav tsum tau ntsuas. Qhov kev xaiv zaum kawg yog ua raws li qhov tshwj xeeb daim ntawv thov scenario, kev xav tau ntawm kev ua haujlwm, thiab kev ua haujlwm ntawm kev lag luam.
Cov ntsiab lus
Mos ferrites thiab tawv ferrites txhua tus muaj lawv tus kheej qhov kev ua tau zoo thiab cov chaw siv. Thaum xaiv, koj yuav tsum xav txog ntau yam xws li kev khiav hauj lwm zaus, magnetic teb yam ntxwv, ib puag ncig tej yam kev mob, nqi peev nyiaj, thiab lwm yam. Nrog rau kev nce qib ntawm cov khoom siv science, ob hom ferrite cov ntaub ntawv yog tas li optimizing kev ua tau zoo thiab nthuav daim ntawv thov ciam teb. Kev nkag siab txog lawv qhov sib txawv tseem ceeb yog tus yuam sij rau kev xaiv thiab kev siv. Rau siab - zaus electromagnetic daim ntaub ntawv, mos ferrites yog ib qho kev xaiv irreplaceable; rau daim ntawv thov hlau nplaum tas mus li uas xav tau qhov chaw sib nqus tas li, cov ferrites nyuaj muab kev daws teeb meem thiab txhim khu kev qha.
