Fa'aogaina o mea maneta ferrite

2023-02-07

Fa'aogaina o mea maneta ferrite


Ferrite maneta mea o se ferromagnetic uamea oxide. I tulaga tau eletise, o le resistivity o le ferrite e e sili atu nai lo le u'amea ma mea fa'amaneta u'amea, ma e iai fo'i galuega dielectric maualuga. O le galuega fa'amaneta o le ferrite e fa'aalia foi le maualuga fa'atosina fa'amaneta i laina maualuga. O le mea lea, ferrite maneta mea ua avea ma mea masani maneta e le u'amea mo le tele taimi ma vaivai tapulaa o iai nei. Ona o le maualalo o le malosi maneta o lo'o taofia i le iunite voluma o ferrite ma le maualalo saturation magnetization, ferrites faatapulaaina i talosaga e mana'omia ai le maualuga o le malosi maneta i taimi maualalo ma maualuga fa'aletonu mana.

 

Ferrite maneta e gaosia e le pauta fa'ameamea. E masani ona vaevaeina i ni ituaiga se lua: barium (Ba) ma le strontium (Sr), ma ua vaevaeina i ituaiga e lua: anisotropic ma isotropic. O le a maneta tumau e le faigofie ona demagnetize ma e le faigofie ona pala. O le mea, ma le maualuga o le vevela galue o le 250 tikeri Celsius, o e fai si ma'a'a ma malepe. E mafai ona tipi ma faʻagaoioia i meafaigaluega e pei o oneone taimane, ma e mafai ona faia i le taimi e tasi ma se limu faʻapipiʻi faʻapipiʻi. O ia oloa e fa'aaogaina lautele i masini maneta tumau (Motor) ma failauga (Talatala) ma isi matata. E fa'atatau i feso'ota'iga, fa'asalalauga, fa'atatau, fa'atonu otometi, ta'avale radar, va'ava'a, satelite feso'ota'iga, fuaina o meafaigaluega, lomitusi, togafiti fa'aleagaina, biomedicine, felauaiga televave, ma isi.

 

Ferrite e aofia i le vaega o Semiconductor i mea tau eletise, o lea e taʻua ai foi maneta semiconductors. Magnetite o se ferrite faigofie.

 

1. ferrite tumau e aofia ai le barium ferrite (BaO.6Fe2O3) ma strontium ferrite (SrO.6Fe2O3). maualuga resistivity, e a'afia i le vaega semiconductor, o lea e la'ititi le fa'aaogaina o le eddy, malosi faʻamalosi e tele, e mafai ona faʻaoga lelei i le va o le ea maneta, lea e tulaga ese mo afi laiti ma maneta tumau. E le o iai uamea taua e pei o le nickel ma cobalt. O mea mata e sili ona lelei, le e le faigata le faagasologa, ma e maualalo le tau. E mafai ona sui le AlNiCo tumau maneta. O lona fa'atusatusaga maualuga o le malosiaga fa'amaneta e maualalo, o lea e sili atu nai lo u'amea maneta i lalo ole tulaga malosi maneta. O lona vevela e le lelei le mautu, o lona i'a e palapa'u ma pala, ma e le mafai ona tatalia aafiaga ma lagona. E le talafeagai mo meafaigāluega fua ma mea fa'amageta fa'atasi ai ma mana'oga mamafa. O oloa o le maneta tumau ferrite e tele lava anisotropic faasologa. E mafai ona fa'aaogaina e gaosia ai le maneta tumau afi, afi maneta tumau, concentrators maneta tumau, tumau fa'agata fa'amaneta, fa'aoso fa'amaneta, va'a fa'amaneta lautele, failauga, masini microwave, pepa fa'amaneta, mea fa'alogo, ma isi.

 

2. ferrites mageta vaivai e aofia ai manganese ferrite (MnO.Fe2O3), zinc ferrite (ZnO.Fe2O3), nickel zinc ferrite (Ni-Zn.Fe2O4), manganese magnesium zinc ferrite (Mn-Mg-Zn.Fe2O4) ma isi tasi poʻo ferrites e tele vaega. O le resistivity e sili atu le tele nai lo le metallic mea maneta, ma e i ai se galuega dielectric maualuga. O lea la, ferrites e iai uma ferromagnetic ma ferroelectric meatotino faapea foi ferromagnetic ma piezoelectric meatotino na aliaʻe. I ala maualuga, lona e sili atu le maualuga o le fa'aogaina o le maneta nai lo mea fa'amaneta, e aofia ai u'amea nickel-iron alloys ma senddust. E mafai ona faʻaaogaina i le faʻasologa e amata mai i nai kilohertz i le selau megahertz. Le gaosiga o le ferrite e patino i le faiga sima masani, o lea e faigofie le faagasologa, ma le tele o ua faasaoina uamea taua, ma o le tau e maualalo.

 

Le saturation maneta flux density o ferrite e matua maualalo, masani lava na o le 1/3-1/5 o le uʻamea. Ferrite e maualalo fa'aagaga fa'amageta mo le iunite voluma, lea e fa'atapula'aina lona fa'aogaina i lalo alaleo, tafega maualuga, ma tuaoi faaili malosi maualuga e maualuga le maneta mana'omia tele le malosi. E sili atu ona talafeagai mo taimi maualuga, maualalo le mana ma le eleele vaivai eletise. Nickel zinc ferrite e mafai ona faʻaaogaina e fai ma antenna pole ma vaeluagalemu transformer autu i faasalalauga leitio, ma manganese zinc ferrite e mafai ona faʻaaogaina e avea ma laina faʻaliliuina autu i le TV tagata talia. E le gata i lea, o loʻo faʻaaogaina ferrites vaivai e faʻaopoopo ai masini ma faʻamama fatu i laina o fesootaiga. O transducers pu'e maneta maualuga sa i ai faaaogaina mo le tele o tausaga.

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