Ferrite composition and magnetic core comprising same
AssigneeLG Innotek Co., Ltd.
InventorsDeok Hyeon KIM, Hyun Jl LEE, Sang Won LEE
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Abstract
A magnetic core, according to the present invention, comprises: a main composition including a manganese (Mn) component with an atomic ratio in the range of 0.74 to 0.76, a zinc (Zn) component with an atomic ratio in the range of 0.15 to 0.17, an iron (Fe) component with an atomic ratio in the range of 2.08 to 2.09, and a cobalt (Co) component with an atomic ratio in the range of 0.005 to 0.010; a magnetic ionic agent; and a non-magnetic additive, wherein the magnetic core has a core loss of 300 mW/cc or less at 80° C. to 100° C. under the conditions of 100 kHz frequency and a maximum magnetic flux density of 200 mT.
Claims17
A magnetic core comprising:
- a main composition comprising a manganese (Mn) component having an atomic ratio of 0.74 to 0.76, a zinc (Zn) component having an atomic ratio of 0.15 to 0.17, an iron (Fe) component having an atomic ratio of 2.08 to 2.09, and a cobalt (Co) component having an atomic ratio of 0.005 to 0.010;
- a magnetic ion agent;
- and
- a non-magnetic additive,
- wherein the magnetic core has a core loss of 300 mW/cc or less at 80 to 100° C., at a frequency of 100 kHz and at a maximum magnetic flux density of 200 mT.
A magnetic core having the following results of WD-XRF (wavelength dispersive-X-ray fluorescence) analysis:
- a weight ratio of manganese oxide (MnO) of 21.2 wt % to 21.6 wt %;
- a weight ratio of zinc oxide (ZnO) of 5.7 wt % to 6.1 wt %;
- a weight ratio of iron oxide (Fe2O3) of 72 wt % to 72.7 wt %;
- a weight ratio of cobalt oxide (Co3O4) of 0.3 wt % to 0.4 wt %;
- a content of calcium oxide (CaO) of 400 ppm to 600 ppm;
- and
- a content of niobium oxide (Nb2O5) of 50 ppm to 600 ppm.
Dependencies are inferred from the claim text.