Kev siv cov khoom siv hlau nplaum ferrite

Kev siv cov khoom siv hlau nplaum ferrite

Cov khoom siv hlau nplaum ferromagnetic yog ferromagnetic hlau oxide. Nyob rau hauv cov nqe lus ntawm hluav taws xob khoom, lub resistivity ntawm ferrite yog ntau ntau dua li cov khoom siv hlau thiab hlau alloy, thiab nws kuj muaj siab dua dielectric zog. Kev ua haujlwm sib nqus ntawm ferrite kuj qhia tau tias siab magnetic permeability ntawm high zaus. Yog li ntawd, cov khoom siv hlau nplaum ferrite tau dhau los ua cov khoom siv hlau nplaum uas tsis yog xim hlau rau cov khoom siv ntau zaus thiab tsis muaj zog tam sim no txwv. Vim qhov tsawg sib nqus zog khaws cia ib chav tsev ntim ntawm ferrite thiab qis saturation magnetization, ferrites yog txwv nyob rau hauv daim ntawv thov yuav tsum muaj lub zog sib nqus sib nqus ntawm qhov tsawg zaus thiab siab kev txwv lub zog.

Ferrite hlau nplaum yog tsim los ntawm hmoov metallurgy. Lawv feem ntau muab faib ua ob hom: barium (Ba) thiab strontium (Sr), thiab muab faib ua ob hom: anisotropic thiab isotropic. Nws yog ib Cov hlau nplaum ruaj khov uas tsis yooj yim rau demagnetize thiab tsis yooj yim rau corrode. Cov cov khoom siv, nrog qhov siab tshaj plaws ua haujlwm kub ntawm 250 degrees Celsius, yog kuj nyuaj thiab nkig. Nws tuaj yeem txiav thiab ua tiav nrog cov cuab yeej xws li pob zeb diamond xuab zeb, thiab nws tuaj yeem tsim nyob rau hauv ib lub sijhawm nrog cov txheej txheem ua pwm. Cov khoom zoo li no tau siv dav hauv cov hlau nplaum ruaj khov (Motor) thiab hais lus (Tus hais lus) thiab lwm yam. Feem ntau siv rau kev sib txuas lus, tshaj tawm, xam, tsis siv neeg tswj, radar navigation, chaw navigation, satellite kev sib txuas lus, ntsuas ntsuas, luam ntawv, kev kho cov pa phem, biomedicine, high-speed tsheb thauj mus los, thiab lwm yam.

Ferrite belongs rau qeb ntawm semiconductors hauv electronics, yog li nws tseem hu ua magnetic semiconductors. Magnetite yog ib qho yooj yim ferrite.

1. Permanent ferrites muaj xws li barium ferrite (BaO.6Fe2O3) thiab strontium ferrite (SrO.6Fe2O3). Siab resistivity, belongs rau qeb semiconductor, yog li eddy tam sim no noj me me, coercive quab yuam yog loj, tuaj yeem siv tau zoo hauv huab cua sib nqus sib nqus, uas yog tshwj xeeb rau cov tshuab hluav taws xob me me thiab cov hlau nplaum ruaj khov. Nws tsis muaj Cov hlau muaj txiaj ntsig zoo li npib tsib xee thiab cobalt. Cov khoom siv raw yog zoo heev, lub txheej txheem tsis nyuaj, thiab tus nqi qis. Yuav hloov AlNiCo mus tas li hlau nplaum. Nws cov khoom siv hluav taws xob sib nqus siab sib nqus yog qhov tsawg, yog li nws loj dua hlau hlau nplaum nyob rau hauv lub zog sib nqus heev. Nws kub stability tsis zoo, nws qhov kev ntxhib los mos yog nkig thiab nkig, thiab nws tsis tuaj yeem tiv taus cuam ​​tshuam thiab hnov. Tsis haum rau kev ntsuas ntsuas thiab cov khoom sib nqus nrog cov kev cai nruj. Cov khoom ntawm cov hlau nplaum ruaj khov ferrite feem ntau yog anisotropic series. Lawv tuaj yeem siv los tsim cov hlau nplaum ruaj khov motors, ruaj khov hlau nplaum motors, ruaj khov hlau nplaum concentrators, mus tas li Magnet suspensions, Sib nqus thrust bearings, broadband magnetic separators, hais lus, khoom siv microwave, daim ntawv kho mob sib nqus, cov khoom siv hnov ​​lus, thiab lwm yam.

2. Mos magnetic ferrites muaj xws li manganese ferrite (MnO.Fe2O3), zinc ferrite (ZnO.Fe2O3), nickel zinc ferrite (Ni-Zn.Fe2O4), manganese magnesium zinc ferrite (Mn- Mg-Zn.Fe2O4) thiab lwm yam ib leeg lossis multi-component ferrites. Lub resistivity yog loj dua li ntawm cov hlau Cov khoom sib nqus, thiab nws muaj ntau dua dielectric muaj nuj nqi. Yog li ntawd, ferrites uas muaj ob qho tib si ferromagnetic thiab ferroelectric zog thiab ferromagnetic thiab piezoelectric zog tau tshwm sim. Nyob rau hauv high zaus, nws magnetic permeability ntau dua li cov khoom siv hlau nplaum hlau, nrog rau cov nickel-hlau alloys thiab sendust. Nws tuaj yeem siv rau hauv qhov zaus Nws nyob ntawm ob peb kilohertz mus rau pua pua megahertz. Kev ua haujlwm ntawm ferrite belongs rau cov txheej txheem ceramic, yog li cov txheej txheem yooj yim, thiab ntau ntau Cov hlau muaj txiaj ntsig tau txais kev cawmdim, thiab tus nqi qis.

Lub saturation magnetic flux ceev ntawm ferrite tsawg heev, feem ntau tsuas yog 1/3-1/5 ntawm cov hlau. Ferrite muaj tsawg Sib nqus zog cia rau ib chav tsev ntim, uas txwv nws siv tsawg frequencies, high tam sim no, thiab siab zog band ciam teb qhov twg high magnetic yuav tsum muaj zog ceev. Nws yog tsim rau ntau zaus, tsis muaj zog thiab tsis muaj zog hluav taws xob teb nto. Nickel zinc ferrite tuaj yeem siv los ua tus kav hlau txais xov ncej thiab nruab nrab zaus transformer core hauv xov tooj cua tshaj tawm, thiab manganese zinc ferrite tuaj yeem siv los ua kab kis tau tus mob transformer core hauv TV tus txais. Tsis tas li ntawd, cov ferrites mos yog siv los ntxiv cov sensors thiab lim cores nyob rau hauv kev sib txuas lus kab. High zaus magnetic kaw transducers tau siv tau ntau xyoo.