CN112005324A - 结构化的平面m型六方晶系铁氧体及其使用方法 - Google Patents

结构化的平面m型六方晶系铁氧体及其使用方法 Download PDF

Info

Publication number
CN112005324A
CN112005324A CN201980025094.9A CN201980025094A CN112005324A CN 112005324 A CN112005324 A CN 112005324A CN 201980025094 A CN201980025094 A CN 201980025094A CN 112005324 A CN112005324 A CN 112005324A
Authority
CN
China
Prior art keywords
oriented
grain
ferrite
hexagonal
type
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201980025094.9A
Other languages
English (en)
Inventor
陈亚杰
凯文·林
张莉
迈克尔·S·怀特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rogers Corp
Original Assignee
Rogers Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rogers Corp filed Critical Rogers Corp
Publication of CN112005324A publication Critical patent/CN112005324A/zh
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/342—Oxides
    • H01F1/344—Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4
    • H01F1/348—Hexaferrites with decreased hardness or anisotropy, i.e. with increased permeability in the microwave (GHz) range, e.g. having a hexagonal crystallographic structure
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/0018—Mixed oxides or hydroxides
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C01G49/0018—Mixed oxides or hydroxides
    • C01G49/0036—Mixed oxides or hydroxides containing one alkaline earth metal, magnesium or lead
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2608—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead
    • C04B35/2633—Compositions containing one or more ferrites of the group comprising manganese, zinc, nickel, copper or cobalt and one or more ferrites of the group comprising rare earth metals, alkali metals, alkaline earth metals or lead containing barium, strontium or calcium
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/26—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on ferrites
    • C04B35/2683—Other ferrites containing alkaline earth metals or lead
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
    • G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
    • G11B5/706—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material
    • G11B5/70626—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances
    • G11B5/70642—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the composition of the magnetic material containing non-metallic substances iron oxides
    • G11B5/70678—Ferrites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0206—Manufacturing of magnetic cores by mechanical means
    • H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0075—Magnetic shielding materials
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00—Screening of apparatus or components against electric or magnetic fields
    • H05K9/0073—Shielding materials
    • H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
    • H05K9/0086—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a single discontinuous metallic layer on an electrically insulating supporting structure, e.g. metal grid, perforated metal foil, film, aggregated flakes, sintering
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/50—Solid solutions
    • C01P2002/52—Solid solutions containing elements as dopants
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/42—Magnetic properties
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3213—Strontium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
    • C04B2235/3215—Barium oxides or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3224—Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide
    • C04B2235/3227—Lanthanum oxide or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3275—Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3279—Nickel oxides, nickalates, or oxide-forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3281—Copper oxides, cuprates or oxide-forming salts thereof, e.g. CuO or Cu2O
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3284—Zinc oxides, zincates, cadmium oxides, cadmiates, mercury oxides, mercurates or oxide forming salts thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3286—Gallium oxides, gallates, indium oxides, indates, thallium oxides, thallates or oxide forming salts thereof, e.g. zinc gallate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3289—Noble metal oxides
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3293—Tin oxides, stannates or oxide forming salts thereof, e.g. indium tin oxide [ITO]
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3296—Lead oxides, plumbates or oxide forming salts thereof, e.g. silver plumbate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3298—Bismuth oxides, bismuthates or oxide forming salts thereof, e.g. zinc bismuthate
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/605—Making or treating the green body or pre-form in a magnetic field
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/76—Crystal structural characteristics, e.g. symmetry
    • C04B2235/767—Hexagonal symmetry, e.g. beta-Si3N4, beta-Sialon, alpha-SiC or hexa-ferrites
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—Density
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/78—Grain sizes and shapes, product microstructures, e.g. acicular grains, equiaxed grains, platelet-structures
    • C04B2235/786—Micrometer sized grains, i.e. from 1 to 100 micron
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/78—Grain sizes and shapes, product microstructures, e.g. acicular grains, equiaxed grains, platelet-structures
    • C04B2235/787—Oriented grains
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/80—Phases present in the sintered or melt-cast ceramic products other than the main phase
    • C04B2235/85—Intergranular or grain boundary phases

Abstract

一种晶粒取向的M型六方晶系铁氧体，具有式MeFe12O19和有效提供c面内的平面磁各向异性和磁化，或锥面各向异性的掺杂物，在六方晶体结构中，其中Me为Sr2+、Ba2+或Pb2+，以及其中大于30％，优选地大于80％的铁氧体晶粒的c轴垂直于c面取向。

Description

结构化的平面M型六方晶系铁氧体及其使用方法
相关申请的交叉引用
本申请要求于2018年4月12日提交的美国申请62/656,522的优先权和权益，其通过引用整体并入本文。
背景技术
本公开涉及晶粒取向的M型六方晶系铁氧体，其在宽范围的工作频率下具有高的磁导率和低的磁损耗。
尖晶石和六方晶系铁氧体具有用于各种低外形的电子装置(例如垂直磁记录、天线、微波吸收器和电磁干扰抑制器)的相当大的潜力。随着微波通信市场的日益发展，铁氧体压实体(compact)或膜的磁性和微波特性可以被定制以满足各种应用的要求。
在微波频率下的高磁导率和低磁损耗将为构建用于电子通信的电小天线提供材料。铁氧体基底的独特磁介电性质允许实现天线元件的小型化，而没有后续通常在高介电常数基底中观察到的带宽损失。因此，磁介电材料在应用于广泛用于个人移动电话、基站等的具有宽的带宽的小型化天线上具有很大的潜力。例如，微波天线和感应器二者均是先进微波通信中的关键组件。
需要具有适用于微波通信应用等的磁介电特性的新的铁氧体。
发明内容
在一方面，晶粒取向的M型六方晶系铁氧体具有式MeFe12O19和有效地在六方晶体结构中提供c面内的平面磁各向异性和磁化，或易锥面各向异性的掺杂物，其中Me为Sr2+、Ba2+或Pb2+，以及其中大于30％，优选地大于80％的铁氧体晶粒的c轴垂直于c面取向。
在另一方面，包括包含晶粒取向的M型六方晶系铁氧体的制品。
在又一方面，制造掺杂的晶粒取向的M型六方晶系铁氧体的方法包括：制备多个包含有效提供c面内的平面磁各向异性和易磁化，或锥面各向异性的掺杂物的式MeFe12O19的铁氧体晶粒，其中Me为Sr2+、Ba2+或Pb2+；使多个铁氧体晶粒取向使得大于30％，优选地大于80％的铁氧体晶粒的c轴垂直于c面取向，以提供掺杂的晶粒取向的M型六方晶系铁氧体；以及任选地，在大于800℃，优选地在800℃至1350℃的温度下对掺杂的晶粒取向的M型六方晶系铁氧体进行烧结，以提供密度为理论密度的至少85％，优选地大于理论密度的90％的经烧结材料。
本领域技术人员将从以下详细描述和所附权利要求中认识并理解上述和其他特征。
具体实施方式
本文描述了新的晶粒取向的M型六方晶系铁氧体，其可以用于提供在宽范围的工作频率下(例如在30MHz至1000MHz的VHF带和300MHz至1000MHz的UHF带下)具有高的磁导率和低的磁损耗的磁介电材料。本文公开的材料可以具有大于或等于约80MHz、100MHz、或甚至150MHz及以上的相对磁导率，这是之前对于六方晶系铁氧体材料未观察到的。
在一方面，晶粒取向的M型六方晶系铁氧体具有式MeFe12O19和有效地在六方晶体结构中提供c面(即，易基面(easy basal plane))内的平面磁各向异性和易磁化，或易锥面各向异性的掺杂物，其中Me为Sr2+、Ba2+或Pb2+，以及其中铁氧体的大于30％，优选地大于80％的晶粒沿晶体结构的垂直于c面的c轴取向。晶粒取向的六方晶系铁氧体也被称为结构化的六方晶系铁氧体(textured hexagonal ferrite)。
六方晶系铁氧体具有其中平面轴被称为“a”(a1、a2、a3)轴的晶体结构。c面平面也被称为基面。c轴为在c面之外的轴。纯的MFe12O19结构中的适当的掺杂物或掺杂物的混合物可以从单轴c轴到c面或易锥面容易地调节(tailor)磁各向异性。因此，易磁化可以从c轴到c面或易锥面变化。同时，虽然c面或锥面易磁化，但c轴变为难磁化轴(hard axis)。本发明人开发了在保持c面或锥面内的易磁化的同时沿晶体结构的c轴具有出乎意料的高度取向的M型六方晶系铁氧体。在晶粒取向的铁氧体中，铁氧体的大于30％，优选地大于80％的晶粒沿晶体结构的垂直于c面的c轴取向。
掺杂物提供c面内的平面磁各向异性(即，易磁化)，或晶体内的易锥面各向异性。易轴(easy axis)被定义为磁化方向的优选的轴。如本文所用，易锥面各向异性为稳定的磁态围绕特定的对称轴成一个角度的各向异性。掺杂物可以为单一掺杂物，或掺杂物的混合物。在一方面，掺杂物包括Co、Ti、Zr、Sn、Ir、Sc、In、Zn、Mg、Cu、Ni、Bi、Al、Ga、La、或其组合。更具体地，掺杂物包括Co2+/Ti4+、Co2+/Zr4+、Co2+/Sn4+、Co2+/Ir4+、Bi2+/Co2+/Ti4+、Bi2+/Co2+/Zr4+、Bi2+/Co2+/Sn4+、或其组合。
在一方面，掺杂物取代晶粒取向的M型六方晶系铁氧体中的至少部分Fe。
本公开的具体的晶粒取向的M型六方晶系铁氧体包括具有下式的铁氧体：BixBa1-x(CoTi)yFe12-2yO19(x＝0至0.8，y＝0.5至1.5)、Ba(CoTi)xFe12-2xO19(x＝0.5至1.5)、Ba(CoZr)xFe12-2xO19(x＝0.5至1.5)、Ba(CoSn)xFe12-2xO19(x＝0.5至1.5)、Ba(CoIr)xFe12-2xO19(x＝0.5至1.5)、BixSr1-x(CoTi)yFe12-2yO19(x＝0至0.8，y＝0.5至1.5)、Sr(CoTi)xFe12-2xO19(x＝0.5至1.5)、Sr(CoZr)xFe12-2xO19(x＝0.5至1.5)、Sr(CoSn)xFe12-2xO19(x＝0.5至1.5)、和Pb(CoTi)xFe12-2xO19(x＝0.5至1.5)。优选的晶粒取向的M型铁氧体包括具有下式的铁氧体：BixBa1-x(CoTi)yFe12-2yO19(x＝0至0.8，y＝0.5至1.5)、Ba(CoTi)xFe12-2xO19(x＝0.5至1.5)、Ba(CoZr)xFe12-2xO19(x＝0.5至1.5)和Ba(CoSn)xFe12-2xO19(x＝0.5至1.5)。具体的晶粒取向的M型六方晶系铁氧体具有式(BixSryBa1-x-y)(CoTi)zFe12-2zO19，其中x为0.05至0.5，y为0至1以及z为0.5至2.0。在该具体的铁氧体中，Sr取代部分Ba。
晶粒取向的M型六方晶系铁氧体可以具有许多有利特性中的一者或更多者。相对磁导率是表示磁性材料在高频率应用中的性能的特性，并且是材料线性响应于施加的磁场的磁化程度相对于游离物质的磁化程度的量度。相对磁导率可以在1MHz至1000MHz下通过阻抗分析仪或者在0.5GHz至10GHz下通过具有同轴空气管路固定装置(airline fixture)的矢量网络分析仪(VNA，Vector network analyzer)来测量。晶粒取向的M型六方晶系铁氧体在50MHz至300MHz的工作频率下的面内相对磁导率可以大于50，大于80，大于100，或大于150。优选地，晶粒取向的M型六方晶系在100MHz的工作频率下的面内相对磁导率可以大于50，大于80，大于100，或大于150。
磁损耗角正切值、介电损耗角正切值和介电常数也是材料的磁介电特性的量度。晶粒取向的M型六方晶系铁氧体可以具有在100MHz下小于0.5，或甚至小于0.2，优选地在100MHz下小于0.1的磁损耗角正切值。磁损耗角正切值可以通过阻抗分析仪或具有同轴空气管路固定装置的VNA来测量。
晶粒取向的M型六方晶系铁氧体可以具有在0MHz至300MHz下小于0.02，优选地在30MHz至300MHz下小于0.03的介电损耗角正切值。介电损耗角正切值可以通过阻抗分析仪或具有同轴空气管路固定装置的VNA来测量。
晶粒取向的M型六方晶系铁氧体可以具有在30MHz至300MHz下10至30，或者在300MHz至1000MHz下6至30的介电常数。介电常数可以通过阻抗分析仪或具有同轴空气管路固定装置的VNA来测量。
在一方面，晶粒取向的M型六方晶系铁氧体具有在50MHz至300MHz的工作频率下大于80的面内相对磁导率；以及在100MHz下小于0.2，优选地在100MHz下小于0.1的磁损耗角正切值。
在另一方面，晶粒取向的M型六方晶系铁氧体具有在30MHz至300MHz下小于0.5，或小于0.2，优选地在30MHz至300MHz下小于0.1的磁损耗角正切值；以及在30MHz至300MHz下小于0.05，优选地在30MHz至300MHz下小于0.02的介电损耗角正切值。
在另一方面，晶粒取向的M型六方晶系铁氧体各自具有在50MHz至300MHz的工作频率下大于50，或者在100MHz的工作频率下大于50的面内磁导率；在100MHz下小于0.5的磁损耗角正切值；在0MHz至300MHz下小于0.02的介电损耗角正切值；以及在30MHz至300MHz下10至30，或者在300MHz至1000MHz下6至30的介电常数。
在又一方面，晶粒取向的M型六方晶系铁氧体各自具有在50MHz至300MHz的工作频率下大于80，或者在100MHz的工作频率下大于80的面内磁导率；在100MHz下小于0.2的磁损耗角正切值；在30MHz至300MHz下小于0.03的介电损耗角正切值；以及在30MHz至300MHz下10至30，或者在300MHz至1000MHz下6至30的介电常数。
在再一方面，晶粒取向的M型六方晶系铁氧体具有在50MHz至300MHz的工作频率下大于150，或者在100MHz的工作频率下大于150的面内磁导率；在100MHz下小于0.1的磁损耗角正切值；在30MHz至300MHz下优选小于0.03的介电损耗角正切值；以及在300MHz至1000MHz下6至30的介电常数。
晶粒取向的M型六方晶系铁氧体在c面内(沿a-轴)的晶粒尺寸可以为0.5微米至2微米(μm)、2μm至6μm、6μm至20μm、20μm至100μm、100μm至200μm、或高至300μm。
在一方面，对晶粒取向的M型六方晶系铁氧体进行烧结。烧结可以在大于800℃，优选地在800℃至1350℃的温度下进行。经烧结的晶粒取向的M型六方晶系铁氧体的烧结密度可以为理论密度的至少85％，优选为理论密度的至少90％。理论密度通过晶体结构和化学配方(chemical formulation)或x-射线衍射测量来计算。
本文还包括包含本文所述的晶粒取向的M型六方晶系铁氧体的制品。示例性制品包括感应器、垂直磁记录、天线、微波吸收器、电磁干扰抑制器或屏蔽材料例如无线电力装置和近场通信中的屏蔽材料。在消费性电子装置的情况下，掺杂的晶粒取向的M型六方晶系铁氧体有望在使用者的手或头的存在下提供改善的性能，更好的吸收辐射特性等。
本文还包括制造掺杂的晶粒取向的M型六方晶系铁氧体的方法，其包括：制备多个包含有效提供c面内的平面磁各向异性和易磁化，或易锥面各向异性的掺杂物的式MeFe12O19的铁氧体晶粒，其中Me为Sr2+、Ba2+或Pb2+；使多个铁氧体晶粒取向使得大于30％，优选地大于80％的铁氧体晶粒的c轴垂直于c面取向，以提供掺杂的晶粒取向的M型六方晶系铁氧体；以及任选地，在大于800℃，优选地在800℃至1350℃的温度下对掺杂的晶粒取向的M型六方晶系铁氧体进行烧结，以提供密度为理论密度的至少85％，优选地大于理论密度的90％的经烧结材料。
在一方面，掺杂物通过用CoTi、CoZr或CoSn替代部分Fe来提供。
在一方面，制备单个晶粒包括煅烧和烧结干粉末、溶胶-凝胶法、熔盐法、共沉淀法、溶胶-凝胶水热法、水热法、或另外的化学法。煅烧/烧结干粉末是常规的陶瓷法。
在常规的陶瓷法的实例中，BaFe12O19粉末通过对BaCo3粉末和Fe2O3粉末进行球磨，随后在900℃至1200℃下煅烧来制备。例如，用Bi2O3掺杂粉末，随后进行另外的球磨以掺入掺杂物。
在示例性溶胶-凝胶法中，BaFe12O19或SrFe12O19通过将Ba(NO3)2或Sr(NO3)2和Fe(NO3)3·9H2O溶解在溶剂例如乙二醇中，随后进行脱水以产生凝胶，以及进行煅烧以提供BaFe12O19或SrFe12O19粉末。
在示例性熔盐法中，使用熔盐例如氯化物或硫酸盐。将反应物和盐的混合物加热至高于盐的熔融温度并产生颗粒形式。在将经反应的物料冷却之后，使用用于盐的溶剂(通常为水)来除去盐。
在示例性共沉淀法中，BaFe12O19粉末通过在室温下将硝酸铁和乙酸钡粉末以选择的Fe3+/Ba2+摩尔比混合并使用NaOH共沉淀来制备。然后，将经共沉淀的产物煅烧以提供六方晶系铁氧体。
在示例性水热法中，例如将包含氢氧化钡和FeOOH的水性悬浮体在高压釜中缓慢加热至250℃至325℃的温度，然后冷却至室温以提供六方晶系铁氧体。
例如，通过前述方法产生的任意六方晶系铁氧体粉末可以通过添加掺杂物例如Bi2O3，随后进行球磨以掺入掺杂物来掺杂。或者，可以在六方晶系铁氧体的合成期间添加掺杂物。
在一方面，使多个晶粒取向包括向晶粒施加旋转面内磁场同时向晶粒施加垂直机械压力、在施加或不施加磁场的情况下向晶粒施加机械剪切力，或其组合。在取向期间，在向晶粒施加机械压力的同时施加旋转磁场提供铁氧体粉末压实体。在一个具体方面，使多个晶粒取向包括施加磁场强度大于2000奥斯特(Oe)，优选地大于8000Oe的旋转面内磁场。
在制造掺杂的晶粒取向的M型六方晶系铁氧体的方法中，在使多个铁氧体晶粒取向期间，所述方法任选地包括使晶粒取向的M型六方晶系铁氧体成形。即，可以同时施加磁场取向和机械压力以提供粉末压实体(通常被称为生坯(green body))。形成生坯之后，可以例如在900℃至1300℃的温度下烧结2小时至10小时。在烧结之前，可以将生坯压实体切成规定尺寸。可以在模具中对生坯压实体进行烧结以提供包含晶粒取向的M型六方晶系铁氧体的组件的形状。
通过以下方面进一步说明本发明。
方面1：一种晶粒取向的M型六方晶系铁氧体，具有式MeFe12O19和有效提供c面内的平面磁各向异性，或锥面各向异性的掺杂物，在六方晶体结构中，其中Me为Sr2+、Ba2+或Pb2+，以及
其中铁氧体的大于30％，优选地大于80％的晶粒沿晶体结构的垂直于c面的c轴取向。
方面2：根据方面1的晶粒取向的M型六方晶系铁氧体，其中掺杂物包括Co、Ti、Zr、Sn、Sc、In、Zn、Mg、Cu、Ni、Bi、Al、Ga、La、或其组合。
方面3：根据方面1的晶粒取向的M型六方晶系铁氧体，其中掺杂物包括Co2+/Ti4+、Co2+/Zr4+、Co2+/Sn4+、Bi2+/Co2+/Ti4+、Bi2+/Co2+/Zr4+、Bi2+/Co2+/Sn4+、或其组合。
方面4：根据方面1的晶粒取向的M型六方晶系铁氧体，具有式BixBa1-x(CoTi)yFe12-2yO19(x＝0至0.8，y＝0.5至1.5)、Ba(CoTi)xFe12-2xO19(x＝0.5至1.5)、Ba(CoZr)xFe12- 2xO19(x＝0.5至1.5)、Ba(CoSn)xFe12-2xO19(x＝0.5至1.5)、Ba(CoIr)xFe12-2xO19(x＝0.5至1.5)、BixSr1-x(CoTi)yFe12-2yO19(x＝0至0.8，y＝0.5至1.5)、Sr(CoTi)xFe12-2xO19(x＝0.5至1.5)、Sr(CoZr)xFe12-2xO19(x＝0.5至1.5)、Sr(CoSn)xFe12-2xO19(x＝0.5至1.5)、或Pb(CoTi)xFe12-2xO19(x＝0.5至1.5)。
方面5：根据方面1的晶粒取向的M型六方晶系铁氧体，具有式BixBa1-x(CoTi)yFe12-2yO19(x＝0至0.8，y＝0.5至1.5)、Ba(CoTi)xFe12-2xO19(x＝0.5至1.5)、Ba(CoZr)xFe12- 2xO19(x＝0.5至1.5)、或Ba(CoSn)xFe12-2xO19(x＝0.5至1.5)。
方面6：根据方面1的晶粒取向的M型六方晶系铁氧体，其中Me为Ba2+，其中Sr替代部分Ba，并且具有式(BixSryBa1-x-y)(CoTi)zFe12-2zO19(x＝0至0.8，y＝0至1，z＝0.5至2.0)。
方面7：根据方面1至6中任一项或更多项的晶粒取向的M型六方晶系铁氧体，其中晶粒取向的M型六方晶系铁氧体具有以下中的至少一者：
在50MHz至300MHz的工作频率下大于50，大于80，大于100，或大于150，优选地在100MHz的工作频率下大于50，大于80，大于100，或大于150的面内磁导率；
在100MHz下小于0.5，或0.2，优选地在100MHz下小于0.1的磁损耗角正切值；
在0MHz至300MHz下小于0.02，优选地在30MHz至300MHz下小于0.03的介电损耗角正切值；或者
在30MHz至300MHz下为10至30，或者在300MHz至1000MHz下为6至30的介电常数。
方面8：根据方面7的晶粒取向的M型六方晶系铁氧体，其中晶粒取向的M型六方晶系铁氧体具有
在30MHz至300MHz下小于0.2，优选地在30MHz至300MHz下小于0.1的磁损耗角正切值；以及
在30MHz至300MHz下小于0.05，优选地在30MHz至300MHz下小于0.02的介电损耗角正切值。
方面9：根据方面7的晶粒取向的M型六方晶系铁氧体，其中晶粒取向的M型六方晶系铁氧体具有
在50MHz至300MHz的工作频率下大于80的面内磁导率；以及
在100MHz下小于0.2，优选地在100MHz下小于0.1的磁损耗角正切值。
方面10：根据方面1至9中任一项或更多项的晶粒取向的M型六方晶系铁氧体，其中六方晶系铁氧体的烧结密度为理论密度的至少85％，优选为理论密度的至少90％。
方面11：根据方面1至10中任一项或更多项的晶粒取向的M型六方晶系铁氧体，其中c面内的晶粒尺寸为0.5μm至2μm、2μm至6μm、6μm至20μm、20μm至100μm、100μm至200μm、或高至300μm。
方面12：一种制品，包含根据方面1至11中任一项或更多项的晶粒取向的M型六方晶系铁氧体。
方面13：根据方面12的制品，其中制品为感应器、垂直磁记录、天线、微波吸收器、电磁干扰抑制器、或屏蔽材料。
方面14：一种无线电力装置或近场通信装置，包含根据方面13的屏蔽材料。
方面15：一种制造根据方面1至11中任一项或更多项的掺杂的晶粒取向的M型六方晶系铁氧体的方法，所述方法包括：
制备多个包含有效提供c面内的平面磁各向异性和c面内的易磁化，或易锥面各向异性的掺杂物的式MeFe12O19的铁氧体晶粒，其中Me为Sr2+、Ba2+或Pb2+；
使多个铁氧体晶粒取向使得铁氧体晶粒的大于30％，优选地大于80％沿晶体结构的垂直于c面的c轴取向，以提供掺杂的晶粒取向的M型六方晶系铁氧体；以及
任选地，在大于800℃，优选地在800℃至1350℃的温度下对掺杂的晶粒取向的M型六方晶系铁氧体进行烧结，以提供密度为理论密度的至少85％，优选地大于理论密度的90％的经烧结材料。
方面16：根据方面15的方法，其中掺杂物通过用CoTi、CoZr或CoSn替代部分Fe来提供。
方面17：根据方面15和16中任一项或更多项的方法，其中制备单个晶粒包括煅烧和烧结干粉末、溶胶-凝胶法、熔盐法、共沉淀法、水热法、或化学合成法。
方面18：根据方面15至17中任一项或更多项的方法，其中使多个晶粒取向包括向晶粒施加旋转面内磁场同时向晶粒施加垂直机械压力、在施加或不施加旋转磁场的情况下向晶粒施加机械剪切力，或其组合。
方面19：根据方面18的方法，其中使多个晶粒取向包括施加磁场强度大于2000Oe，优选地大于8000Oe的旋转面内磁场。
方面20：根据方面15至19中任一项或更多项的方法，在使多个铁氧体晶粒取向期间包括使晶粒取向的M型六方晶系铁氧体成形。
方面21：根据方面15至20中任一项或更多项的方法，在烧结之前包括将晶粒取向的M型六方晶系铁氧体切成规定尺寸。
通常，组合物、方法和制品可以替代地包括本文所公开的任何成分、步骤或组件，由本文所公开的任何成分、步骤或组件组成，或者基本上由本文所公开的任何成分、步骤或组件组成。组合物、方法和制品可以另外地或替代地配制、实施或制造以不含或基本上不含对实现本权利要求的功能或目的不是必需的任何成分、步骤或组件。
除非本文另有说明或者与上下文明显矛盾，否则术语没有数量词修饰的名词的使用(特别是在所附权利要求的上下文中)将被解释为涵盖单数和复数二者。除非本文另有说明或者与上下文明显矛盾，否则术语“或”意指“和/或”。除非另有提及，否则术语“包含”、“具有”、“包括”和“含有”将被解释为开放式术语(即，意指“包括但不限于”)。“其组合”为开放式术语，其包括指定的要素中的至少一者，任选地与一个或更多个未指定的相似要素一起的组合。
除非本文另有说明，否则数值范围的记载仅旨在用作单独提及落入该范围内的每个单独值的速记方法，并且每个单独值被合并到说明书中，如同其在本文中单独记载的。所有范围的端点都包括在该范围内并且可独立组合。除非本文另有说明或者与上下文明显矛盾，否则本文所述的所有方法都可以以合适的顺序进行。任何和所有实例或示例性语言(如“例如”)的使用仅旨在更好地举例说明本发明，并且不对本发明的范围构成限制，除非另有说明。本说明书中的语言都不应被解释为表示任何未要求保护的要素对于本文中所用的本发明的实践是必不可少的。
虽然已经参照示例性实施方案描述了本发明，但本领域技术人员应理解，在不脱离本发明的范围的情况下，可以做出各种改变并且等同物可以替代其要素。此外，在不脱离本发明的实质范围的情况下，可以做出许多修改以使特定情况或材料适应本发明的教导。因此，本发明不旨在限于作为实施本发明所预期的最佳方式而公开的特定实施方案，而是本发明将包括落入所附权利要求的范围内的所有实施方案。除非本文另有说明或者与上下文明显矛盾，否则本发明涵盖其所有可能变型中的上述要素的任何组合。

Claims (21)

1.一种晶粒取向的M型六方晶系铁氧体，具有式MeFe12O19和有效地在六方晶体结构中提供c面内的平面磁各向异性和磁化、或者锥面各向异性的掺杂物，其中Me为Sr2+、Ba2+或Pb2+，以及
其中所述铁氧体的大于30％的晶粒沿晶体结构的垂直于所述c面的c轴取向。
2.根据权利要求1所述的晶粒取向的M型六方晶系铁氧体，其中所述掺杂物包括Co、Ti、Zr、Sn、Ir、Sc、In、Zn、Mg、Cu、Ni、Bi、Al、Ga、La、或其组合。
3.根据权利要求1所述的晶粒取向的M型六方晶系铁氧体，其中所述掺杂物包括Co2+/Ti4+、Co2+/Zr4+、Co2+/Sn4+、Co2+/Ir4+、Bi2+/Co2+/Ti4+、Bi2+/Co2+/Zr4+、Bi2+/Co2+/Sn4+、或其组合。
4.根据权利要求1所述的晶粒取向的M型六方晶系铁氧体，具有式BixBa1-x(CoTi)yFe12- 2yO19(x＝0至0.8，y＝0.5至1.5)、Ba(CoTi)xFe12-2xO19(x＝0.5至1.5)、Ba(CoZr)xFe12-2xO19(x＝0.5至1.5)、Ba(CoSn)xFe12-2xO19(x＝0.5至1.5)、Ba(CoIr)xFe12-2xO19(x＝0.5至1.5)、BixSr1-x(CoTi)yFe12-2yO19(x＝0至0.8，y＝0.5至1.5)、Sr(CoTi)xFe12-2xO19(x＝0.5至1.5)、Sr(CoZr)xFe12-2xO19(x＝0.5至1.5)、Sr(CoSn)xFe12-2xO19(x＝0.5至1.5)、或Pb(CoTi)xFe12-2xO19(x＝0.5至1.5)。
5.根据权利要求1所述的晶粒取向的M型六方晶系铁氧体，具有式BixBa1-x(CoTi)yFe12- 2yO19(x＝0至0.8，y＝0.5至1.5)、Ba(CoTi)xFe12-2xO19(x＝0.5至1.5)、Ba(CoZr)xFe12-2xO19(x＝0.5至1.5)、或Ba(CoSn)xFe12-2xO19(x＝0.5至1.5)。
6.根据权利要求1所述的晶粒取向的M型六方晶系铁氧体，其中Me为Ba2+，其中Sr替代部分Ba，并且具有式(BixSryBa1-x-y)(CoTi)zFe12-2zO19(x＝0至0.8，y＝0至1，z＝0.5至2.0)。
7.根据权利要求1所述的晶粒取向的M型六方晶系铁氧体，其中所述晶粒取向的M型六方晶系铁氧体具有以下中的至少一者：
在50MHz至300MHz的工作频率下大于50的面内磁导率；
在100MHz下小于0.5的磁损耗角正切值；
在0MHz至300MHz下小于0.02的介电损耗角正切值；或者
在30MHz至300MHz下为10至30的介电常数。
8.根据权利要求7所述的晶粒取向的M型六方晶系铁氧体，其中所述晶粒取向的M型六方晶系铁氧体具有
在30MHz至300MHz下小于0.2的磁损耗角正切值；以及
在30MHz至300MHz下小于0.05的介电损耗角正切值。
9.根据权利要求7所述的晶粒取向的M型六方晶系铁氧体，其中所述晶粒取向的M型六方晶系铁氧体具有
在50MHz至300MHz的工作频率下大于80的面内磁导率；以及
在100MHz下小于0.2的磁损耗角正切值。
10.根据权利要求1所述的晶粒取向的M型六方晶系铁氧体，其中所述六方晶系铁氧体的烧结密度为理论密度的至少85％。
11.根据权利要求1所述的晶粒取向的M型六方晶系铁氧体，其中所述c面内的晶粒尺寸最高至300μm。
12.一种制品，包含根据权利要求1所述的晶粒取向的M型六方晶系铁氧体。
13.根据权利要求12所述的制品，其中所述制品为感应器、垂直磁记录、天线、微波吸收器、电磁干扰抑制器、或屏蔽材料。
14.一种无线电力装置或近场通信装置，包含根据权利要求13所述的屏蔽材料。
15.一种制造根据权利要求1所述的掺杂的晶粒取向的M型六方晶系铁氧体的方法，所述方法包括：
制备多个包含有效地提供c面内的平面磁各向异性和磁化或锥面各向异性的掺杂物的式为MeFe12O19的铁氧体晶粒，其中Me为Sr2+、Ba2+或Pb2+；
使多个铁氧体晶粒取向使得大于30％的所述铁氧体晶粒沿晶体结构的垂直于所述c面的c轴取向，以提供所述掺杂的晶粒取向的M型六方晶系铁氧体；以及
任选地，在大于800℃的温度下对所述掺杂的晶粒取向的M型六方晶系铁氧体进行烧结，以提供密度为理论密度的至少85％的经烧结材料。
16.根据权利要求15所述的方法，其中通过用CoTi、CoZr、或CoSn替代部分Fe来提供所述掺杂物。
17.根据权利要求15所述的方法，其中制备单个晶粒包括煅烧和烧结干粉末、溶胶-凝胶法、熔盐法、共沉淀法、水热法、溶胶凝胶水热法、或另外的化学合成法。
18.根据权利要求15所述的方法，其中使多个晶粒取向包括向晶粒施加旋转面内磁场同时向晶粒施加垂直机械压力、在施加或不施加所施加的磁场的情况下向晶粒施加机械剪切力，或其组合。
19.根据权利要求18所述的方法，其中使多个晶粒取向包括施加磁场强度大于2000Oe的旋转面内磁场。
20.根据权利要求15所述的方法，包括在使多个铁氧体晶粒取向期间使所述晶粒取向的M型六方晶系铁氧体成形。
21.根据权利要求15所述的方法，包括在进行烧结之前将所述晶粒取向的M型六方晶系铁氧体切成规定尺寸。
CN201980025094.9A 2018-04-12 2019-04-09 结构化的平面m型六方晶系铁氧体及其使用方法 Withdrawn CN112005324A (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201862656522P 2018-04-12 2018-04-12
US62/656,522 2018-04-12
PCT/US2019/026465 WO2019199732A1 (en) 2018-04-12 2019-04-09 Textured planar m-type hexagonal ferrites and methods of use thereof

Publications (1)

Publication Number Publication Date
CN112005324A true CN112005324A (zh) 2020-11-27

Family

ID=66597641

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201980025094.9A Withdrawn CN112005324A (zh) 2018-04-12 2019-04-09 结构化的平面m型六方晶系铁氧体及其使用方法

Country Status (8)

Country Link
US (1) US11508503B2 (zh)
JP (1) JP7223020B2 (zh)
KR (1) KR20200142499A (zh)
CN (1) CN112005324A (zh)
DE (1) DE112019001920T5 (zh)
GB (1) GB2585601B (zh)
TW (1) TW201943676A (zh)
WO (1) WO2019199732A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112142456A (zh) * 2020-09-04 2020-12-29 湖南航天磁电有限责任公司 一种铁氧体吸波材料及其制备方法
CN112939590A (zh) * 2021-03-12 2021-06-11 电子科技大学 一种x波段准平面化器件用六角铁氧体材料及其制备方法
CN113511687A (zh) * 2021-07-23 2021-10-19 桂林电子科技大学 一种吸波材料及其制备方法

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11434171B1 (en) * 2019-02-12 2022-09-06 Hrl Laboratories, Llc Low-temperature-deposited self-biased magnetic composite films containing discrete hexaferrite platelets
US11679991B2 (en) 2019-07-30 2023-06-20 Rogers Corporation Multiphase ferrites and composites comprising the same
TW202116700A (zh) 2019-09-24 2021-05-01 美商羅傑斯公司 鉍釕ｍ型六方晶系鐵氧體、包含彼之組合物及複合物、及製造方法
US11783975B2 (en) 2019-10-17 2023-10-10 Rogers Corporation Nanocrystalline cobalt doped nickel ferrite particles, method of manufacture, and uses thereof
WO2021167785A1 (en) 2020-02-21 2021-08-26 Rogers Corporation Z-type hexaferrite having a nanocrystalline structure
GB2609128A (en) * 2020-05-07 2023-01-25 Rogers Corp M-type hexaferrite having a planar anisotropy
CN112768170B (zh) * 2020-12-30 2022-11-01 烟台正海磁性材料股份有限公司 一种稀土永磁体及其制备方法

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1276534B (de) * 1965-05-10 1968-08-29 Philips Patentverwaltung Verfahren zur Herstellung eines ferromagnetischen Ferritmaterials mit hexagonaler Kristallstruktur
JPS5076111A (zh) * 1973-11-12 1975-06-21
JP3693398B2 (ja) 1995-12-15 2005-09-07 松下電器産業株式会社 セラミックス磁性体材料およびこれを用いた高周波用回路部品
WO1998025278A1 (fr) 1996-12-03 1998-06-11 Tdk Corporation Procede de fabrication d'agglomeres d'oxyde magnetique
US6139766A (en) 1997-02-25 2000-10-31 Tdk Corporation Oxide magnetic material, ferrite particle, sintered magnet, bonded magnet, magnetic recording medium and motor
US20100173101A1 (en) * 2006-08-11 2010-07-08 Northeastern University Method of manufacturing thick-film, low microwave loss, self-biased barium-hexaferrite having perpendicular magnetic anisotropy
JP5165231B2 (ja) 2006-11-29 2013-03-21 旭化成イーマテリアルズ株式会社 磁性粉含有樹脂組成物
JP4867742B2 (ja) * 2007-03-26 2012-02-01 Ｔｄｋ株式会社 磁石の製造装置及び製造方法
DE102007026503B4 (de) 2007-06-05 2009-08-27 Bourns, Inc., Riverside Verfahren zur Herstellung einer Magnetschicht auf einem Substrat und druckbarer magnetisierbarer Lack
US7815820B2 (en) 2007-10-18 2010-10-19 General Electric Company Electromagnetic interference shielding polymer composites and methods of manufacture
JP2010238748A (ja) 2009-03-30 2010-10-21 Tdk Corp 複合磁性材料及びアンテナ、並びに無線通信機器
EP2640527A4 (en) 2010-11-15 2016-03-09 Trustees Of The University Of Alabama For And On Behalf Of The University Of Alabama Board Of M-TYPE HEXAFERRITE ANTENNAS FOR USE IN WIRELESS COMMUNICATION DEVICES
WO2012103020A2 (en) * 2011-01-24 2012-08-02 Skyworks Solutions, Inc. Specialty materials processing techniques for enhanced resonant frequency hexaferrite materials for antenna applications and other electronic devices
US20130063296A1 (en) 2011-08-11 2013-03-14 Basf Se Microwave absorbing composition
JP5650270B2 (ja) * 2013-03-29 2015-01-07 株式会社リケン マグネトプランバイト型六方晶フェライト及びノイズ抑制シート
JP6379577B2 (ja) * 2014-03-27 2018-08-29 Tdk株式会社 六方晶フェライト焼結体、及びこれを用いた高周波磁性部品
US20160099498A1 (en) 2014-10-02 2016-04-07 Rogers Corporation Magneto-dielectric substrate, circuit material, and assembly having the same
US9596755B2 (en) 2014-10-15 2017-03-14 Rogers Corporation Magneto-dielectric substrate, circuit material, and assembly having the same
US10032547B2 (en) 2014-10-24 2018-07-24 Skyworks Solutions, Inc. Increased resonant frequency alkali-doped Y-phase hexagonal ferrites
DE112016001291B4 (de) 2015-03-19 2023-06-15 Rogers Corporation Magnetodielektrisches substrat sowie dessen herstellung, schaltungsmaterial sowie dessen herstellung und eine anordnung mit demschaltungsmaterial sowie schaltung und herstellung der schaltung, antenne und hf-bauelement
US11679991B2 (en) 2019-07-30 2023-06-20 Rogers Corporation Multiphase ferrites and composites comprising the same
DE112020003801T5 (de) 2019-08-05 2022-05-25 Rogers Corporation Ruthenium-dotiertes Z-type Hexaferrite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112142456A (zh) * 2020-09-04 2020-12-29 湖南航天磁电有限责任公司 一种铁氧体吸波材料及其制备方法
CN112939590A (zh) * 2021-03-12 2021-06-11 电子科技大学 一种x波段准平面化器件用六角铁氧体材料及其制备方法
CN113511687A (zh) * 2021-07-23 2021-10-19 桂林电子科技大学 一种吸波材料及其制备方法

Also Published As

Publication number Publication date
TW201943676A (zh) 2019-11-16
WO2019199732A1 (en) 2019-10-17
KR20200142499A (ko) 2020-12-22
GB202014487D0 (en) 2020-10-28
DE112019001920T5 (de) 2020-12-24
US20190318858A1 (en) 2019-10-17
JP2021517882A (ja) 2021-07-29
GB2585601A (en) 2021-01-13
GB2585601B (en) 2023-04-26
JP7223020B2 (ja) 2023-02-15
US11508503B2 (en) 2022-11-22

Similar Documents

Publication Publication Date Title
CN112005324A (zh) 结构化的平面m型六方晶系铁氧体及其使用方法
JP6637959B2 (ja) 極超短波アンテナの使用のためのＣｏ２Ｚ−型のフェライト複合材料
JP6722684B2 (ja) 極超短波用ＭＯドープＣｏ２Ｚ型フェライト複合材料
JP5853381B2 (ja) アンテナ用磁性材料、並びに、アンテナ及び無線通信機器
EP2784044B1 (en) Magnetoplumbite-type hexagonal ferrite
JP6864431B2 (ja) Ｙ相六方晶フェライト材料にカリウムをドープするための方法、高周波動作において使用されるアンテナ、およびカリウムがドープされたｙ相六方晶フェライト材料
JP7191798B2 (ja) 向上した共鳴周波数を有する改良ｚ型六方晶フェライト材料
US8609062B2 (en) Specialty materials processing techniques for enhanced resonant frequency hexaferrite materials for antenna applications and other electronic devices
JP2003146739A (ja) 高周波用磁性体材料およびそれを用いた高周波回路素子
CN114736010A (zh) 一种高熵氧化物陶瓷及其制备方法和作为电磁波吸收材料的应用
KR20170111537A (ko) 자성 복합체, 그 제조 방법, 및 자성 복합체를 포함하는 안테나
JP2002068830A (ja) 六方晶ｙ型酸化物磁性材料およびインダクタ素子
Vinaykumar et al. Characterizations of low-temperature sintered BaCo1. 3Ti1. 3Fe9. 4O19 M-type ferrite for high-frequency antenna application
JP4279393B2 (ja) 板状の軟磁性フェライト粒子粉末及びこれを用いた軟磁性フェライト粒子複合体
KR101282194B1 (ko) Ｙ형 페라이트 및 이로 제조된 페라이트 성형체
CN112794368A (zh) 一种高磁导率低介电常数的复合材料及其制备方法和用途
JPH01291406A (ja) 高誘電率磁性材料およびその製造方法
JP5541475B2 (ja) フェライト焼結体およびその製造方法並びに電子部品
WO2022030601A1 (ja) 軟磁性組成物、焼結体、複合体、ペースト、コイル部品およびアンテナ
JP6064315B2 (ja) 磁性酸化物焼結体、並びにこれを用いたアンテナ及び無線通信機器
JP2004123404A (ja) 高周波帯用スピネル型フェライト焼結体、スピネル型フェライト粒子粉末及び該スピネル型フェライト粒子粉末を用いたグリーンシート
JP6718144B2 (ja) 六方晶フェライト焼結体、及びこれを用いた高周波磁性部品
CN115246736A (zh) 用于vuhf天线应用的镍锌铜铁氧体
JP6064732B2 (ja) 磁性酸化物焼結体、及びこれを用いた高周波磁性部品
JP2018020941A (ja) 複合酸化物セラミックスおよびその製造方法並びにアンテナ

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Chen Yajie

Inventor after: Lin Kevin

Inventor after: Zhang Li

Inventor after: Michael S. white

Inventor before: Chen Yajie

Inventor before: Lin Kevin

Inventor before: Zhang Li

Inventor before: Michael S. white

WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20201127