Barium ferrite thiab strontium ferrite
Barium ferrite yog ib hom hlau nplaum ruaj khov ferrite nrog ntau npaum li cas thiab daim ntawv thov dav. Qhov zoo tshaj plaws tivthaiv piv yog BaO.6Fe2O3 (los yog BaFe12O19). Cov khoom siv hlau nplaum ruaj khov yog BaO.(5 ~ 6) Fe2O3, thiab anisotropy tas li yog K13.3X105J / m3 ntawm chav tsev kub. Ib leeg-domain hais muaj kev sib raug zoo.
Qhov zoo tshaj plaws piv piv ntawm strontium ferrite yog SrO.6Fe2O3, thiab qhov tseeb ntawm cov khoom siv hlau nplaum ruaj khov yog SrO.(5 ~ 6) Fe2O3. Qhov loj me me ntawm ib lub npe yog loj dua li ntawm barium ferrite, thiab tib lub npe tau yooj yim tau thaum lub sij hawm sintering. Br thiab Hcb yog siab tshaj barium ferrite, thiab tsis yooj yim los ua irreversible demagnetization ntawm qhov kub thiab txias, yog li lawv yog ntau haum rau lub sij hawm ntawm loj demagnetization.
Bonded ferrite - roj hmab hlau nplaum
Cov hmoov ferrite tsis tov nrog roj hmab lossis yas tuaj yeem ua rau cov khoom siv hlau nplaum ruaj khov sib txuas ferrite, tuaj yeem ua pwm lossis txhaj tshuaj molding rau ntau hom kev ua haujlwm siab. Bonded ferrite tau muab faib ua cov ntawv cog lus muag (rubber bonding) thiab hard bonding (yas bonding). Cov khoom muag muag yog cov hlau nplaum roj hmab, uas tuaj yeem nias rau hauv cov ntawv los yog ib daim hlab.
Ntxiv nrog rau cov khoom siv ntawm cov khoom sib txuas ferrite yog ib qho yooj yim rau kev ua, lwm qhov zoo ntawm nws yog tias nws tuaj yeem tsim txhua qhov loj ntawm cov khoom siv hluav taws xob sib nqus los ntawm qhov siab tshaj plaws mus rau xoom, thiab qhov kub thiab txias stability, corrosion kuj, siab coercivity. Plasticity zoo, tus nqi qis thiab ntau yam kev ua tau zoo ua rau cov ferrites sib txuas ua qhov chaw kub ceev tshaj plaws hauv cov khoom lag luam hlau nplaum ruaj khov. Cov khoom sib nqus ntawm cov khoom sib nqus ferrites feem ntau qis dua li cov sintered ferrites zoo sib xws vim tias lawv tau ntim nrog ntau cov ntaub ntawv tsis sib nqus nrog qhov ntim ntawm 10% ~ 15 feem pua.
