# US 12,112,876 B2 · Magnetic core using composite material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,112,876 B2 - Document ID: US12112876B2 - Status: Granted - Kind: B2 - Application number: 17/291,755 - Filed: 2019-11-15 - Published: 2022-01-27 - Granted: 2024-10-08 - Earliest claimed: 2018-11-16 - Assignees: LG Innotek Co., Ltd. - Applicants: LG Innotek Co., Ltd. - Inventors: Mi Jin Lee; In Ho Jeon; Sang Won Lee; Seok Bae - Web page: https://patentgrep.com/patent/US12112876B2 ## CPC - H01F 3/08: made from powder (powder coatings on sheets H01F3/02; on strips or ribbons H01F3/04; on wires H01F3/06) - H01F 27/255: made from particles (H01F27/26 takes precedence) - C04B 35/26: based on ferrites - H01F 1/344: {Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4} - Y10T 428/32: Composite [nonstructural laminate] of inorganic material having metal-compound-containing layer and having defined magnetic layer - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract The present invention relates to a magnetic core using a different type of magnetic material. The magnetic core according to one embodiment may comprise: a ferrite powder comprising manganese (Mn), zinc, iron, and oxygen (O); and a metal alloy powder made of at least two substances from among nickel (Ni), iron (Fe), aluminum (Al), molybdenum (Mo), and silicon (Si). Here, the magnetic core can comprise 67 to 72 wt % of the ferrite powder and 28 to 33 wt % of the metal alloy powder. ## Claims ### Claim 1 A magnetic core comprising: 67 wt % to 72 wt % of ferrite powder comprising manganese (Mn), zinc (Zn), iron (Fe), and oxygen (O); 28 wt % to 33 wt % of metal-alloy powder comprising at least one of nickel (Ni), and iron (Fe), and at least one of aluminum (Al), molybdenum (Mo), and silicon (Si); and a nonmagnetic additive, wherein a difference in molar ratio between the ferrite powder and the metal-alloy powder is less than 5% point, and wherein the ferrite powder and the metal-alloy powder having micrometer-sized particles are bonded with each other, wherein the nonmagnetic additive comprises at least one of silicon oxide (SiO2), calcium oxide (CaO), tantalum pentoxide (Ta2O5), niobium pentoxide (Nb2O5), and vanadium pentoxide (V2O5), and wherein space between the two kinds of particles is filled with the nonmagnetic additive. ### Claim 2 (depends on 1) The magnetic core according to claim 1, wherein the ferrite powder comprises Mn0.67Zn0.23Fe2.09O4, and wherein the metal-alloy powder comprises molybdenum permalloy powder (MPP) (Ni0.79Fe0.16Mo0.05). ### Claim 3 (depends on 1) The magnetic core according to claim 1, wherein the metal-alloy powder comprises at least one of FeNi, FeSi, FeAlSi, and NiFeMo. ### Claim 4 (depends on 1) The magnetic core according to claim 1, wherein the magnetic core has a Curie temperature of 300° C. or higher. ### Claim 5 (depends on 1) The magnetic core according to claim 1, wherein the magnetic core has a resonance frequency of 1 MHz or higher. ### Claim 6 A magnetic core comprising: first ferrite powder comprising (Mn0.67Zn0.23Fe2.09O4; second ferrite powder comprising Ni0.6Zn0.4Fe2O4; and a nonmagnetic additive, wherein a difference in molar ratio between the first ferrite powder and the second ferrite powder is less than 5% point, wherein the first ferrite powder and the second ferrite powder having micrometer-sized particles are bonded with each other, wherein the nonmagnetic additive comprises at least one of silicon oxide (SiO2), calcium oxide (CaO), tantalum pentoxide (Ta2O5), niobium pentoxide (Nb2O5), and vanadium pentoxide (V2O5), and wherein space between the two kinds of particles is filled with the nonmagnetic additive. ### Claim 7 (depends on 6) The magnetic core according to claim 6, wherein the magnetic core has a resonance frequency of 1 MHz or higher.