Kugwiritsa ntchito maginito a ferrite

Kugwiritsa ntchito maginito a ferrite

Ferrite maginito zinthu ndi ferromagnetic zitsulo oxide. Pazinthu zamagetsi, resistivity ya ferrite ndi chachikulu kuposa chachitsulo ndi aloyi maginito zipangizo, komanso ali ntchito zapamwamba za dielectric. Ntchito ya maginito ya ferrite imasonyezanso kwambiri maginito permeability pa ma frequency apamwamba. Choncho, ferrite maginito zakuthupi wakhala wamba sanali zitsulo maginito zakuthupi kwa mkulu pafupipafupi ndi ofooka malire apano. Chifukwa chochepa mphamvu ya maginito yomwe imasungidwa pa voliyumu ya unit ferrite ndi otsika machulukitsidwe magnetization, ferrites ndi malire mu ntchito zomwe zimafuna kuchulukitsidwa kwamphamvu kwa maginito pama frequency otsika komanso apamwamba zolepheretsa mphamvu.

Maginito a Ferrite amapangidwa ndi ufa zitsulo. Iwo makamaka anawagawa mitundu iwiri: barium (Ba) ndi strontium (Sr), ndipo amagawidwa mu mitundu iwiri: anisotropic ndi isotropic. Ndi a maginito okhazikika omwe siosavuta kuyimitsa maginito komanso osavuta kuwononga. The zinthu, ndi pazipita ntchito kutentha 250 digiri Celsius, ndi zolimba komanso zolimba. Ikhoza kudulidwa ndi kukonzedwa ndi zida monga diamondi mchenga, ndipo akhoza kupangidwa nthawi imodzi ndi aloyi kukonzedwa nkhungu. Zogulitsa zotere zimagwiritsidwa ntchito kwambiri pamakina okhazikika amagetsi (Motor) ndi okamba (Speaker) ndi magawo ena. Zogwiritsidwa ntchito makamaka pakulankhulana, kuwulutsa, kuwerengera, kuwongolera zokha, kuyenda kwa radar, kuyenda mumlengalenga, satellite kulankhulana, kuyeza zida, kusindikiza, kuchiza matenda, biomedicine, mayendedwe othamanga kwambiri, etc.

Ferrite ndi m'gulu la ma semiconductors mu zamagetsi, motero amatchedwanso maginito semiconductors. Magnetite ndi ferrite yosavuta.

1. Ma ferrite osatha akuphatikizapo barium ferrite (BaO.6Fe2O3) ndi strontium ferrite (SrO.6Fe2O3). High resistivity, ali m'gulu la semiconductor, kotero kuti eddy pano ndi ochepa, mphamvu yokakamiza ndi yayikulu, imatha kugwiritsidwa ntchito bwino pamagawo amagetsi amagetsi, yomwe ili yapadera kwa majenereta ang'onoang'ono ndi maginito okhazikika. Ilibe zitsulo zamtengo wapatali monga nickel ndi cobalt. The zopangira ndi zabwino kwambiri, ndi ndondomeko si zovuta, ndipo mtengo ndi otsika. Itha kulowa m'malo mwa AlNiCo okhazikika maginito. Mphamvu yake yamagetsi yosiyana kwambiri ndi yochepa, choncho ndi yaikulu kuposa maginito zitsulo pansi kwambiri maginito mphamvu zinthu. Kutentha kwake kukhazikika kwake ndi kopanda pake, kapangidwe kake kamakhala kosavuta komanso kofewa, ndipo sikungathe kupirira kukhudza ndi kumva. Zosayenerera zida zoyezera ndi zida zamaginito ndi zofunika kwambiri. Zogulitsa za ferrite za maginito okhazikika ndizo makamaka mndandanda wa anisotropic. Iwo angagwiritsidwe ntchito kupanga okhazikika maginito sitata ma motors, maginito okhazikika a maginito, zolumikizira maginito zokhazikika, zokhazikika suspensions maginito, maginito thrust bearings, broadband magnetic separators, olankhula, zida za ma microwave, mapepala othandizira maginito, zothandizira kumva, ndi zina.

2. Ferite yofewa ya maginito imaphatikizapo manganese ferrite (MnO.Fe2O3), zinki ferrite (ZnO.Fe2O3), faife tambala zinki ferrite (Ni-Zn.Fe2O4), manganese magnesium zinc ferrite (Mn- Mg-Zn.Fe2O4) ndi ena osakwatiwa kapena ma ferrite amitundu yambiri. The resistivity ndi yaikulu kwambiri kuposa ya zitsulo maginito, ndipo ili ndi ntchito yapamwamba ya dielectric. Choncho, ferrites zomwe zili ndi ferromagnetic ndi ferroelectric properties komanso ferromagnetic ndi piezoelectric katundu anatulukira. Pamaulendo apamwamba, ake maginito permeability ndi apamwamba kwambiri kuposa zitsulo maginito zipangizo, kuphatikizapo nickel-iron alloys ndi sendust. Itha kugwiritsidwa ntchito pafupipafupi kuyambira ma kilohertz angapo mpaka mazana a megahertz. Kukonzekera kwa ferrite ndi wamba ndondomeko ceramic, kotero ndondomeko ndi losavuta, ndi zambiri zitsulo zamtengo wapatali zimasungidwa, ndipo mtengo wake ndi wotsika.

The machulukitsidwe maginito kusinthasintha kachulukidwe wa ferrite ndi yotsika kwambiri, kawirikawiri 1/3-1/5 yokha ya chitsulo. Ferrite ali ndi zochepa Magnetic energy reserve pa voliyumu ya unit, zomwe zimalepheretsa kugwiritsidwa ntchito kwake pang'onopang'ono ma frequency, mafunde okwera, ndi malire amphamvu amphamvu pomwe pali maginito apamwamba mphamvu kachulukidwe chofunika. Ndizoyenera kwambiri pafupipafupi, mphamvu zochepa ndi ofooka magetsi kumunda pamwamba. Nickel zinc ferrite angagwiritsidwe ntchito ngati mlongoti pole ndi pakati pafupipafupi thiransifoma pachimake pa wailesi, ndi manganese zinki ferrite angagwiritsidwe ntchito ngati mzere kufala thiransifoma pachimake pa TV wolandira. Kuphatikiza apo, ma ferrite ofewa amagwiritsidwa ntchito kuwonjezera masensa ndi zosefera m'mizere yolumikizana. Ma transducers apamwamba kwambiri a maginito akhala amagwiritsidwa ntchito kwa zaka zambiri.