Permanent ferrite hlau nplaum yog cov khoom siv ua haujlwm siab tam sim no siv dav hauv cov khoom siv hlau nplaum. Nws muaj qhov zoo ntawm cov hlau nplaum siab, siab ruaj khov thiab ua haujlwm kub. Nws cov khoom tseem ceeb yog barium magnesium ferrite, hlau barate, npib tsib xee, tooj liab thiab lwm yam khoom. Sib txawv proportions hauv cov hlau nplaum tuaj yeem tsim cov khoom sib nqus sib txawv.
Barium-magnesium ferrite yog cov khoom tseem ceeb ntawm cov hlau nplaum ruaj khov ferrite, suav txog ntau dua 80%. Barium-magnesium ferrite yog tsim los ntawm manganese ferrite thiab ib theem sib nqus nyuaj nrog cov qauv perovskite. Vim hais tias cov pa oxygen ions ntawm barium-magnesium ferrite muaj kev sib koom tes zoo, lawv tuaj yeem tsim muaj kev sib pauv muaj zog nrog cov hlau ions sab hauv. Nyob rau tib lub sijhawm, barium-magnesium ferrite kuj muaj cov magnetocrystalline anisotropy loj thiab tuaj yeem tswj tau cov kev taw qhia sib nqus zoo dua.
Ntxiv nrog rau barium magnesium ferrite, hlau barate kuj yog ib qho tseem ceeb ntawm cov hlau nplaum ruaj khov ferrite hlau nplaum. Kev sib pauv hloov pauv ntawm cov pa oxygen ion sublattice thiab cov hlau ions ntawm cov hlau barate tso cai rau nws los tsim ib theem nyuaj sib nqus thiab muab cov hlau nplaum muaj zog. Cov ntsiab lus ntawm hlau barate nyob rau hauv cov hlau nplaum feem ntau yog tswj ntawm li 5%.
Cov khoom xws li npib tsib xee thiab tooj liab feem ntau ntxiv rau cov hlau nplaum ferrite mus tas li. Cov ntsiab lus no feem ntau yog siv los txhim kho corrosion kuj ntawm cov hlau nplaum. Lawv tuaj yeem tswj hwm cov khoom sib nqus ntawm cov hlau nplaum los ntawm kev txwv tsis pub cov nplej loj hlob hauv barium-magnesium ferrite.
Cov khoom tseem ceeb ntawm cov hlau nplaum ruaj khov ferrite muaj xws li barium magnesium ferrite, hlau barate, npib tsib xee, tooj liab thiab lwm yam, uas tuaj yeem tsim cov khoom sib nqus sib txawv hauv ntau qhov sib txawv. Tsis tas li ntawd, nrog kev txhim kho ntawm kev tshawb fawb thiab thev naus laus zis, ntau thiab ntau cov ntaub ntawv sib xyaw, xws li hlau oxide, steel oxide, thiab lwm yam, yog siv rau hauv kev tsim cov hlau nplaum ferrite mus tas li, uas yuav ntxiv dag zog rau kev txhim kho thiab siv cov hlau nplaum ferrite mus tas li. .
