Ferrite magnetic substance and method of manufacturing the same
AssigneesHyundai Motor Company, Hyundai Mobis Co., Ltd.
InventorsYoung Min Kim, Choul Hwan Ham, Kee Yang Lee, Hee Bok Kang
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Abstract
Disclosed is a method of manufacturing a ferrite magnetic substance, including: a first mixing operation of providing a first mixture composed of 47 to 49 wt % of Fe, 16 to 18 wt % of Mn, 5.2 to 7.2 wt % of Zn, and a remainder of oxygen and other inevitable impurities, a second mixing operation of providing a second mixture composed of the first mixture and an additive including, based on 100 parts by weight of the first mixture, 28 to 51 ppm of Si, 140 to 210 ppm of Nb and 155 to 185 ppm of Zr, and a finish operation of producing a ferrite magnetic substance by sintering the second mixture.
Claims9
A method of manufacturing a ferrite magnetic substance, comprising:
- providing a first mixture comprising 47 to 49 wt % of Fe, 16 to 18 wt % of Mn, 5.2 to 7.2 wt % of Zn, and a remainder of oxygen and other inevitable impurities;
- providing a second mixture comprising the first mixture and an additive comprising, based on 100 parts by weight of the first mixture, 28 to 51 ppm of Si, 140 to 210 ppm of Nb and 155 to 185 ppm of Zr;
- and
- sintering the second mixture to produce a ferrite magnetic substance,
- wherein the ferrite magnetic substance comprises an insulation layer formed by grain boundary segregation with 155 to 185 ppm of Zr, wherein the ferrite magnetic substance has a core loss of 350 mW/cc or less under conditions of 100 KHz, 200 mT, and a temperature range of 80 to 100° C.
A ferrite magnetic substance, formed through sintering and comprising 47.42 to 48.89 wt % of Fe, 16.06 to 17.50 wt % of Mn, 5.46 to 7.07 wt % of Zn, 28 to 47 ppm of Si, 140 to 210 ppm of Nb, 148 to 185 ppm of Zr, and a remainder of oxygen and other inevitable impurities, wherein the ferrite magnetic substance comprises an insulating layer formed by grain boundary segregation with 148 to 185 ppm of Zr,
- wherein the ferrite magnetic substance has a core loss of 350 mW/cc or less under conditions of 100 KHz, 200 mT, and a temperature range of 80 to 100° C.
Dependencies are inferred from the claim text.