CN102473499A - 铁氧体磁性材料 - Google Patents

铁氧体磁性材料 Download PDF

Info

Publication number
CN102473499A
CN102473499A CN2010800307255A CN201080030725A CN102473499A CN 102473499 A CN102473499 A CN 102473499A CN 2010800307255 A CN2010800307255 A CN 2010800307255A CN 201080030725 A CN201080030725 A CN 201080030725A CN 102473499 A CN102473499 A CN 102473499A
Authority
CN
China
Prior art keywords
ferrite
magnetic material
magnet
ferrite magnetic
quality
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.)
Pending
Application number
CN2010800307255A
Other languages
English (en)
Inventor
长冈淳一
森宜宽
森田启之
皆地良彦
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.)
TDK Corp
Original Assignee
TDK 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 TDK Corp filed Critical TDK Corp
Publication of CN102473499A publication Critical patent/CN102473499A/zh
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • C01G49/0054—Mixed oxides or hydroxides containing one rare earth metal, yttrium or scandium
    • 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
    • H01F1/11—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 in the form of particles
    • 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
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G49/00—Compounds of iron
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G51/00—Compounds of cobalt
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G51/00—Compounds of cobalt
    • C01G51/006—Compounds containing, besides cobalt, two or more other elements, with the exception of oxygen or hydrogen
    • 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
    • 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
    • C04B35/2641—Compositions containing one or more ferrites of the group comprising rare earth metals and one or more ferrites of the group comprising alkali metals, alkaline earth metals 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/6261—Milling
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/62605—Treating the starting powders individually or as mixtures
    • C04B35/62625—Wet mixtures
    • C04B35/6263—Wet mixtures characterised by their solids loadings, i.e. the percentage of solids
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00—Crystal-structural characteristics
    • C01P2002/30—Three-dimensional structures
    • 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
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/62—Submicrometer sized, i.e. from 0.1-1 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
    • C01P2006/12—Surface area
    • 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
    • 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
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
    • C04B2235/3203—Lithium 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
    • C04B2235/3205—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
    • C04B2235/3208—Calcium oxide or oxide-forming salts thereof, e.g. lime
    • 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
    • C04B2235/3239—Vanadium oxides, vanadates or oxide forming salts thereof, e.g. magnesium vanadate
    • 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
    • C04B2235/3241—Chromium oxides, chromates, 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
    • C04B2235/3244—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
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3251—Niobium oxides, niobates, tantalum oxides, tantalates, 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
    • C04B2235/3256—Molybdenum oxides, molybdates or oxide forming salts thereof, e.g. cadmium molybdate
    • 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
    • C04B2235/3258—Tungsten oxides, tungstates, 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
    • C04B2235/3262—Manganese oxides, manganates, rhenium oxides or oxide-forming salts thereof, e.g. MnO
    • 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
    • C04B2235/3277—Co3O4
    • 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
    • C04B2235/3287—Germanium oxides, germanates or oxide forming salts thereof, e.g. copper germanate
    • 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
    • C04B2235/3294—Antimony oxides, antimonates, antimonites or oxide forming salts thereof, indium antimonate
    • 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
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
    • 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
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
    • 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
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/447—Phosphates or phosphites, e.g. orthophosphate or hypophosphite
    • 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
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/448—Sulphates or sulphites
    • 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
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5409—Particle size related information expressed by specific surface values
    • 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
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, 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
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
    • C04B2235/5445—Particle size related information expressed by the size of the particles or aggregates thereof submicron sized, i.e. from 0,1 to 1 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
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/54—Particle size related information
    • C04B2235/549—Particle size related information the particle size being expressed by crystallite size or primary particle size
    • 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
    • C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
    • C04B2235/6562—Heating rate
    • 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
    • C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
    • C04B2235/661—Multi-step sintering
    • 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
    • C04B2235/72—Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics
    • 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
    • C04B2235/72—Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics
    • C04B2235/726—Sulfur content
    • 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
    • C04B2235/72—Products characterised by the absence or the low content of specific components, e.g. alkali metal free alumina ceramics
    • C04B2235/727—Phosphorus or phosphorus compound content
    • 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
    • C04B2235/78—Grain sizes and shapes, product microstructures, e.g. acicular grains, equiaxed grains, platelet-structures
    • C04B2235/785—Submicron sized grains, i.e. from 0,1 to 1 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
    • C04B2235/786—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
    • C04B2235/80—Phases present in the sintered or melt-cast ceramic products other than the main phase
    • C04B2235/85—Intergranular or grain boundary phases
    • 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
    • C04B2235/94—Products characterised by their shape
    • 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
    • C04B2235/95—Products characterised by their size, e.g. microceramics

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Hard Magnetic Materials (AREA)
  • Magnetic Ceramics (AREA)
  • Manufacturing Cores, Coils, And Magnets (AREA)
  • Compounds Of Iron (AREA)

Abstract

本发明是以提供一种能够获得维持高Br以及高HcJ而且具有高Hk/HcJ的永久性磁铁的铁氧体磁性材料为目的的。优选的实施方式所涉及的铁氧体磁性材料是一种由硬磁铁氧体构成的铁氧体磁性材料，P的含量以P2O5进行换算为0.001质量％以上。

Description

铁氧体磁性材料
技术领域
本发明涉及铁氧体磁性材料，更为详细的是涉及由硬磁铁氧体构成的铁氧体磁性材料。
背景技术
作为由氧化物构成的永久性磁铁的材料众所周知有硬磁铁氧体。由该硬磁铁氧体构成的铁氧体磁性材料是以铁氧体烧结体和粘结磁铁(bond magnet)的形式作为永久性磁铁被加以提供的。近年来，伴随着电子零部件的小型化以及高性能化，对于由铁氧体磁性材料构成的永久性磁铁，也不断要求既要是小型的又要具有高磁气特性。
作为永久性磁铁的磁气特性的指标一般是使用剩余磁通密度(Br)以及矫顽(磁)力(HcJ)，这些指标为高的则评价为具有高磁气特性。一直以来，从提高永久性磁铁的Br以及HcJ的观点出发，使铁氧体磁性材料中含有规定的元素等的改变其组成的探讨一直在进行。
另外，永久性磁铁除了具有高Br以及HcJ之外，还优选磁化为Br的90％的时候的磁场的值(Hk)相对于HcJ的比率，即矩形比(squareness ratio)也要高。如果Hk/HcJ高的话，那么由于外部磁场和温度变化引起的退磁(demagnetization)就小并且变得能够获得稳定的磁气特性。
以像这样提高Hk/HcJ为目的，在以下所述专利文献1中展示了一种以下所述的手法，即，在铁氧体烧结磁铁的制造过程中，粉碎将六方晶铁氧体作为主相的粒子，从而获得作为磁铁原料的成形用粉末的时候，成为规定的粉碎效率并获得规定比表面积的粉末。
专利文献
专利文献1：日本专利申请公开2008-270792号公报
发明内容
发明所要解决的课题
如以上所述，虽然永久性磁铁优选高的Br、HcJ以及Hk/HcJ，但是要良好地同时获得这3个数据至今为止仍然不是一件容易的事，故要求得到能够简便而且良好地获得这些特性的铁氧体磁性材料。
因此，本发明鉴于以上所述的情况而完成，其目的在于提供一种能够获得维持高Br以及高HcJ而且具有高Hk/HcJ的永久性磁铁的铁氧体磁性材料。
解决问题的手段
为了达到上述目的，本发明的铁氧体磁性材料，其特征为：是一种由硬磁铁氧体构成的铁氧体磁性材料；P的含量以P2O5进行换算为0.001质量％以上。
本发明的铁氧体磁性材料是由硬磁铁氧体所构成，作为永久性磁铁具有充分的Br以及HcJ。另外，通过使P的含量以P2O5进行换算为0.001质量％以上，从而能够持续良好地维持Br以及HcJ，并获得高Hk/HcJ。通常在铁氧体以外的成分被包含于磁性材料中的情况下，其比例越大越会对磁气特性产生不良影响，但是在本发明中，通过含有规定比例以上的P，从而意外地发现能够提高Hk/HcJ。
从更为良好地获得上述效果的观点出发，优选为铁氧体磁性材料P的含量以P2O5进行换算为0.001～0.1质量％，更加优选为0.005～0.08质量％。
发明效果
根据本发明，能够提供一种能够获得维持高Br以及高HcJ而且具有高Hk/HcJ的永久性磁铁的铁氧体磁性材料。
附图说明
图1是表示优选的实施方式的铁氧体永久性磁铁的立体图。
图2是分别表示磁铁1的平面以及端面的图。
符号说明
1.磁铁
具体实施方式
以下是一边参照附图一边就有关本发明的优选的实施方式加以说明。在附图的说明中将相同的符号标注于相同的要素，从而避免重复说明。
(铁氧体永久性磁铁)
图1是表示优选的实施方式的铁氧体永久性磁铁的立体图。图1所表示的铁氧体永久性磁铁1(以下简称为“磁铁1”)具有以其端面成为圆弧状的方式弯曲的形状，一般具有被称之为弧段形状、C字形状、瓦片形状、弓形状等的形状。该磁铁1是由铁氧体磁性材料的烧结体所构成的、铁氧体烧结磁铁。
构成磁铁1的铁氧体磁性材料是由硬磁铁氧体所构成，整体中的P(磷原子)的含量以P2O5进行换算为0.001质量％以上。通过使P含量满足这样的条件，从而就能够获得具有高Hk/HcJ的磁铁1。
但是，如果增大P的含量，那么因为会有出现Br以及HcJ发生降低的情况，所以P的含量的上限优选对应于所希望的Br以及HcJ来决定。作为永久性磁铁从取得通常适宜的Br、HcJ以及Hk/HcJ的观点出发，P的含量以P2O5进行换算优选为0.001～0.1质量％，更加优选为0.005～0.08质量％。
磁铁1中的P的含量例如可以由电感耦合等离子体(inductivelycoupled plasma)发光分光分析装置或者可以由荧光X线定量分析来测定。
构成磁铁1的铁氧体磁性材料作为主相而含有硬磁铁氧体。在此，所谓主相是指在构成铁氧体烧结体的结晶粒子和在形成于该粒子之间的晶界中的构成结晶粒子的部分。
构成铁氧体磁铁材料的硬磁铁氧体是指，如果施加过一次磁场而发生磁化的话，那么即使去掉磁场也会具有在最初被磁化的方向上保持磁化矢量(magnetization vector)的性质，并且通常具有六方晶型的结晶构造的铁氧体。该硬磁铁氧体如果施加了磁场之后，就会容易地使磁化矢量发生变化，并且与通常具有尖晶石型结晶构造的软铁氧体有着较大的不同。
作为硬磁铁氧体例如可以列举M型(磁铅石型)铁氧体、W型铁氧体、X型铁氧体、Y型铁氧体以及Z型铁氧体等。其中尤其是M型铁氧体，因为能够良好地取得取决于含有P的Hk/HcJ的提高效果的倾向，所以被优选。尤其是作为M型铁氧体优选为SrM型铁氧体、LaCo置换SrM型铁氧体、LaCo置换CaM型铁氧体等。
在磁铁1中，铁氧体磁性材料除了副成分(P和后述那样的副成分)之外的部分是由硬磁铁氧体所构成。从获得良好的磁气特性的观点出发，硬磁铁氧体的含量优选为占铁氧体磁性材料全体的90～100质量％，更加优选为95～100质量％。铁氧体磁性材料的组成可以由荧光X线定量分析来加以分析，上述的主相的存在可以由X线衍射或者电子线衍射来确认。
构成磁铁1的铁氧体磁性材料，作为硬磁铁氧体以外的副成分而含有P，P既可以包含于以上所述的主相中又可以包含于晶界中。另外，铁氧体磁性材料在不大幅度降低特性的范围内也可以在主相和晶界中含有除了P之外的副成分。
铁氧体磁性材料其中作为P以外的副成分例如也可以含有Al和/或Cr。由此，磁铁1的HcJ会有提高的倾向。从获得良好的HcJ提高效果的观点出发，Al和/或Cr的含量相对于铁氧体磁性材料全体作为Al2O3和Cr2O3来计算的话优选为0.1质量％以上。但是，因为这些成分会有使磁铁1的Br含量降低的情况，所以从能够良好地获得Br的观点出发，优选为3质量％以下。
另外，作为副成分例如也可以以B2O3的形式来含有B。通过含有B从而就能够降低在制得由铁氧体磁性材料构成的烧结体时的预烧温度和烧结温度，由此而变成能够获得良好的磁铁1的生产性。但是，如果B过多的话，因为会有磁铁1的饱和磁化发生降低的情况，所以B的含量相对于铁氧体磁性材料的全体，以B2O3进行计算优选为0.5质量％以下。
再有，铁氧体磁性材料其中作为副成分可以以氧化物的形态含有Ga、Mg、Cu、Mn、Ni、Zn、In、Li、Ti、Zr、Ge、Sn、V、Nb、Ta、Sb、As、W、Mo等。这些物质的含量换算成各个原子的化学计量组成的氧化物而优选为氧化镓5质量％以下，氧化镁5质量％以下，氧化铜5质量％以下，氧化锰5质量％以下，氧化镍5质量％以下，氧化锌5质量％以下，氧化铟3质量％以下，氧化锂1质量％以下，氧化钛3质量％以下，氧化锆3质量％以下，氧化锗3质量％以下，氧化锡3质量％以下，氧化钒3质量％以下，氧化铌3质量％以下，氧化钽3质量％以下，氧化锑3质量％以下，氧化砷3质量％以下，氧化钨3质量％以下，氧化钼3质量％以下。但是，在多种类组合这些物质而含有的情况下，为了避免磁气特性的降低而优选其合计含量成为5质量％以下。
还有，铁氧体磁性材料，作为副成分优选不含有碱金属元素(Na、K、Rb等)。碱金属元素的存在会有使磁铁1的饱和磁化降低的倾向。但是，也会有碱金属元素例如被包含于为了制得铁氧体磁性材料的原料中的情况，如果是像这样含有不可避免的程度的话，那么在铁氧体磁性材料中含有也并非不可。不对磁气特性产生大影响的碱金属元素的含量为3质量％以下。
构成磁铁1的铁氧体磁性材料正如以上所述其形态为烧结体，并且具有包含结晶粒子(主相)和晶界的构造。该烧结体中的结晶粒子的平均结晶粒径优选为1.5μm以下，更优选为1.0μm以下，进一步优选为0.5～1.0μm。通过拥有像这样的平均结晶粒径，从而就变得容易获得高HcJ。铁氧体磁性材料的烧结体的结晶粒径可以由扫描型电子显微镜来测定。
磁铁1如以上所述是具有弯曲的弧段形状的磁铁，图2是从上方看到该磁铁1的平面图以及从侧面看到的端面图。如以上所述，磁铁1具备拥有规定中心角的扇形的平面形状。在此，所谓弧段形状的磁铁的中心角是以以下所述形式进行定义的值。即，所谓中心角是将在具有圆弧状的端面上的外侧边设想成圆弧的时候的中心角，在图2所表示的端面图中是以θ来表示的。具有像这样形状的磁铁1在图2的端面图中一般是以在用OR表示的箭头方向上具有径向各向异性的形式对结晶组织实施配向。
磁铁1虽然是由铁氧体磁性材料的烧结体所构成，但是这个铁氧体磁性材料对于形成具有规定中心角的磁铁1来说是特别有利的。即，在制造铁氧体烧结磁铁的情况下，如后面所述的那样在一旦形成成形体之后，通过烧结该成形体从而制得作为烧结磁铁的烧结体。在制得具有各向异性的弧段形状的烧结体的情况下，配合于作为目的的形状而使用弯曲了的成形体。
成形体虽然在烧成时会有一定比例的收缩，但是在使其作磁场定向的情况下以结晶组织来看的话，收缩率在c轴(容易磁化轴)方向和a轴方向上有较大的不同，通常c轴方向的收缩率比a轴方向的收缩率来得大。为此，在使结晶组织定向成圆弧状来加以排列的情况下，由于该收缩率的差，通常显示出由于烧成中心角变成更大那样的收缩的变动。为此，根据像这样的缩率比，为了制得具有所希望的中心角的各向异性的形状，成形体鉴于这个缩率比而预先将圆弧变浅(缩小中心角)。还有，该收缩率之差例如可以用缩率比(c轴方向的收缩率/a轴方向的收缩率)来表示，该缩率比基本上是由铁氧体磁性材料的组成来决定的。缩率比越大，越是在作为弧段形状的情况下在圆弧的切线方向与圆弧的法线方向的收缩程度上产生差异，作为整体变得会产生中心角变大那样的收缩。
在制造圆弧较深的磁铁的情况下，在成形体阶段加深圆弧将成为必要。然而，在打算制得中心角成为30°以上那样的磁铁的情况下，因为成形体的圆弧也被控制得相当深，所以例如在成形时不让两端附近充分凝固，因而对于成形来说有必要需要较长的时间，或有必要加大成形压力，与以往的技术相比要求更严的成形条件。其结果除了生产性变低之外，所获得的磁铁的特性也容易发生降低。为此，一直以来，制造具有中心角成为30°以上那样的各向异性的铁氧体烧结磁铁存在着一种困难的倾向。
相对于此，构成本实施方式的磁铁1的铁氧体磁性材料具有以上所述那样的组成，特别是因为P的含量以P2O5进行计算为0.001质量％以上，所以还能够发挥加大成形体在烧结时的缩率比的效果。为此，根据该铁氧体磁性材料，就能够在烧成时产生大缩率比从而从圆弧浅的成形体制得圆弧深的(中心角大)烧结体。因此就变得容易制得所谓30°以上优选为60°以上的具有大中心角的磁铁1。
以上虽然就有关优选的实施方式所涉及的磁铁1作了说明，但是由本发明所制得的磁铁只要是由本发明的铁氧体磁性材料构成的磁铁，不限定于以上所述的方式。例如，磁铁除了具有各向异性的弧段形状之外，还可以具有平板状以及圆柱状等各种各样的形状。即使是除了弧段形状之外，只要是由本发明的铁氧体磁性材料所构成，则既能够维持高Br以及高HcJ又能够获得高Hk/HcJ。
另外，磁铁1并不限于由以上所述那样的铁氧体材料的烧结体构成的物质，例如，也可以是将铁氧体磁性材料的粉末通过胶粘剂结合而形成的粘结磁铁。
在此情况下，以上所述的铁氧体磁性材料的条件如果是满足于铁氧体磁性材料的粉末即可。构成铁氧体磁性材料的粉末的一次粒子的平均粒径虽然没有特别的限制，但是优选为2μm以下，更优选为1μm以下，进一步优选为0.1～1μm。如果该平均粒径为过大，那么粉末中的多磁区粒子的比率则变高，并且要担心HcJ会降低。另外，如果平均粒径过小的话，那么时而会由于热扰乱而降低磁性，或者在磁场中进行形成的时候的定向性和成形性变差。
作为胶粘剂可以列举丁腈橡胶(例如NBR橡胶)、聚氯乙烯、聚酰胺树脂(例如尼龙6、尼龙12(以上，注册商标))等。
(铁氧体永久性磁铁的制造方法)
接着，就有关以上所述那样的铁氧体永久性磁铁的制造方法的优选实施方式作如下说明。在以下的实施方式中，将展示一个由铁氧体磁性材料构成的铁氧体烧结磁铁的制造方法的例子。在本实施方式中，铁氧体烧结磁铁能够经过配合工序、预烧工序、粉碎工序、成形工序以及烧成工序来加以制造。关于各个工序将在以下进行说明。
<配合工序>
在配合工序中，配合铁氧体磁性材料的原料来获得原料组合物。首先，作为硬磁铁氧体的原料可以列举含有构成硬磁铁氧体的元素中的1种或者2种以上的化合物(原料化合物)。原料化合物例如优选粉末状的物质。作为原料化合物可以列举各个元素的氧化物或者由烧成而成为氧化物的化合物(碳酸盐、氢氧化物、硝酸盐等)，例如可以例示SrCO3、La(OH)3、Pr5O11、Nd2O3、MnO、Fe2O3、BaCO3、CaCO3以及Co3O4等。原料化合物的粉末的平均粒径例如从能够均质配合的观点出发优选为0.1～2.0μm的程度。
另外，作为铁氧体磁性材料中的P原料，虽然可以列举P、P4O10、FePO4·nH2O等，但是如果是含有P的化合物的话，则没有特别的限制。另外，也可以在原料粉末中对应于必要配合一些其它副成分的原料化合物(元素单质、氧化物等)。
配合例如可以通过以获得所希望的铁氧体磁性材料的组成的形式对各个原料实施称量，在进行混合后使用湿式磨碎机、球磨机等并对原料进行0.1～20小时左右的混合以及粉碎处理来加以实行。还有，在这个配合工序中没有必要混合所有的原料，其中一部分可以在后面所述的预烧之后进行添加。
<预烧工序>
在预烧工序中，预烧在配合工序中所获得的原料粉末。预烧例如可以在空气中等氧化性气氛中进行。预烧温度优选为1100～1400℃的温度范围，更优选为1100～1300℃，进一步优选为1100～1250℃。预烧时间可以是1秒钟～10小时，优选为1秒钟～3小时。由预烧而获得的预烧体含有70％以上的以上所述那样的主相(M相)。主相的一次粒子径优选为10μm以下，更加优选为2μm以下。
<粉碎工序>
在粉碎工序中，粉碎由预烧工序形成的颗粒状和块状的预烧体，并再一次粉碎成粉末状。由此，后述的成形工序中的成形就变得容易。在这个粉碎工序中可以添加在配合工序中没有配合的原料(原料的后添加)。粉碎工序例如在以将预烧体成为粗粉末的形式粉碎(粗粉碎)之后，再进一步对粗粉末作细微粉碎(微粉碎)，即可以以两个阶段的工序来实行粉碎。
粗粉碎例如可以用振动研磨机等，直至平均粒径成为0.5～5.0μm为止进行粉碎。关于微粉碎是进一步由湿式磨碎机、球磨机以及喷射研磨机等来粉碎在粗粉碎工序中所获得的粗粉碎材料。在微粉碎过程中是以所获得的微粉碎材料的平均粒径优选为0.08～2.0μm；更优选为0.1～1.0μm；进一步优选为0.2～0.8μm的形式实行粉碎的。微粉碎材料的比表面积(例如由BET法来求得)优选为7～12m2/g左右。适当的粉碎时间根据粉碎方法而有所不同，例如在湿式磨碎机的情况下优选30分钟～10小时，由球磨机进行的湿式粉碎则优选为10～50小时左右。
在粉碎工序中添加原料的一部分的情况下，例如添加能够在微粉碎过程中进行。在本实施方式中虽然能够在微粉碎的时候添加作为Si成分的SiO2和Ca成分的CaCO3，但是也能够在配合工序和粗粉碎工序中添加这些化合物。
另外，在微粉碎工序中为了提高在烧成后所获得的烧结体的磁气(性)的定向度而优选添加例如以一般式Cn(OH)nHn+2表示的多元醇。在此，作为多元醇在一般式中n优选为4～100的数，更优选为4～30的数，进一步优选为4～20的数，最优选为4～12的数。作为多元醇例如可以列举山梨醇。另外，也可以并用2个种类以上的多元醇。而且，除了多元醇之外也可以并用其它公知的分散剂。
在添加多元醇的情况下，其添加量相对于添加对象(例如粗粉碎材料)优选为0.05～5.0质量％，更优选为0.1～3.0质量％，进一步优选为0.2～2.0质量％。还有，在微粉碎工序中进行添加的多元醇在后面所述的烧成工序中被热分解去除。
<成形工序>
在成形工序中，在磁场中对在粉碎工序后所得到的粉碎材料(优选为微分碎材料)进行成形从而得到成形体。成形体可以以干式成形以及湿式成形的任一个方法来加以实行。从提高磁气(性)的定向度的观点出发优选以湿式成形来加以实行。
在由湿式成形来加以成形的情况下，例如优选在通过以湿式来实行以上所述的微粉碎工序而得到浆料之后，将该浆料浓缩到规定的浓度，并制得湿式成形用浆料。浆料的浓缩可以由离心分离和压滤等来加以实行。湿式成形用浆料优选为在其全量中微粉碎材料占30～80质量％左右。在浆料中作为分散微粉碎材料的分散溶剂优选为水。在此情况下，在浆料中也可以添加葡萄糖酸、葡萄糖酸盐以及山梨醇等表面活性剂。另外，作为分散溶剂也可以使用非水类溶剂。作为非水类溶剂可以使用甲苯和二甲苯等有机溶剂。在此情况下，优选添加油酸等表面活性剂。此外，湿式成形用浆料也可以通过将分散溶剂等添加到微粉碎后的干燥状态的微分碎材料中来加以调制。
关于湿式成形，接着对于该湿式成形用浆料进行磁场中成形。在此情况下，成行压力优选为9.8～49MPa(0.1～0.5ton/cm2)左右，所施加的磁场优选为398～1194kA/m(5～15kOe)左右。
在本实施方式中，因为是形成由本发明的铁氧体磁性材料构成的磁铁，所以在如以上所述那样制造弧段形状的磁铁的情况下，在后面所述的烧成工序中能够使其产生高缩率比。因此，在这个成形工序中，即使形成圆弧比所希望的磁铁更浅(中心角小)的成形体，也能够在烧成后获得圆弧深的磁铁。
成形体的中心角优选根据铁氧体磁性材料的组成作适当设定，例如成形体的中心角能够被设定成比作为目标的磁铁的中心角小10～20％左右。
<烧成工序>
在烧成工序中烧成在成形工序制得的成形体，从而以其作为烧结体。由此就可获得由如以上所述那样的铁氧体磁性材料的烧结体构成的磁铁1。在制造弧段形状的磁铁的情况下，在烧成中，以具有规定中心角的形式进行成形的成形体发生收缩，这时也就产生一定的缩率比。由此，所获得的烧结体成为具有比成形体更小的中心角的烧结体。为了获得圆弧深的烧结体而优选烧成时的缩率比为1.0～2.5，更加优选为1.5～2.5。
烧成能够在大气中的氧化性气氛中进行。烧成温度优选为1050～1270℃，更加优选为1080～1240℃。另外，烧成时间(保持在烧成温度的时间)优选为0.5～3左右。
此外，在以如以上所述那样的湿式成形来制得成形体的情况下，如果没有使这个成形体充分干燥而就这样通过进行烧成来作急剧加热的话，那么就会有可能分散溶剂等发生急剧挥发从而在成形体上产生龟裂。因此，从避免像这样的不良状况的观点出发，优选通过在到达上述烧结温度之前，例如从室温到100℃左右以0.5℃/分钟程度的慢慢的升温速度进行加热来使成形体充分干燥，从而抑制龟裂的发生。此外，在添加表面活性剂(分散剂)等的情况下，例如优选在100～500℃左右的温度范围内通过以2.5℃/分钟左右的升温速度进行加热从而充分去除这些分散溶剂挥发物(脱脂处理)。此外，这些处理既可以在开始烧成工序的时候实行也可以在烧成工序前以别的途径来进行。
以上虽然就有关铁氧体烧结磁铁的优选的制造方法作了说明，但是只要至少使用本发明的铁氧体磁性材料，制造方法并不限定于以上所述的制造方法，可以对以上所述条件作适当变更。
另外，制造作为磁铁不是铁氧体烧结磁铁而是粘结磁铁的情况下，例如在直至上述粉碎工序为止实行了各个加工工序之后，混合所获得的粉碎物和胶粘剂，通过在磁场中对该混合物加以成形，从而就能够获得含有本发明的铁氧体磁性材料粉末的粘结磁铁。
实施例
以下是通过实施例来进一步详细地说明本发明，但是本发明并不限定于这些实施例。
[实施例1](铁氧体烧结磁铁的制造)
首先，作为铁氧体磁性材料的主成分的原料，准备氧化铁(Fe2O3)、碳酸钙(CaCO3)、碳酸锶(SrCO3)、氧化钴(Co3O4)以及氢氧化镧[La(OH)3]，并以烧成后的硬磁铁氧体的组成(主要组成)成为以下所述组成式的形式分别对这些原料进行称量。还有，关于氧化钴因为也要在微粉碎时进行添加，所以在此为了获得主要成分而准备必要量的一半。另外，作为副成分的原料准备氧化硅(SiO2)以及磷酸铁(FePO4·nH2O)。以在铁氧体磁性材料中SiO2的含量成为0.69质量％的形式对SiO2进行称量。另外，以在铁氧体磁性材料中P的含量成为以P2O5进行换算为表1所表示的值的形式分别变化FePO4·nH2O的配合量。
主要组成的组成式：Ca1-w-xRwAxFezMmO19
式中A＝Sr，R＝La、M＝Co。另外，w＝0.40，x＝0.15，z＝9.53，m＝0.24。
接着，用湿式磨碎机对称量后的原料混合10分钟并加以粉碎，从而获得浆料(配合工序)。在对这浆料进行了干燥之后，在大气中以1250℃的温度条件下进行保持2小时的预烧(预烧工序)。
用小型棒杆式振动研磨机对获得的预烧粉末实施10分钟的粗粉碎。在这个粗粉碎材料中，分别以相对于粗粉碎材料成为0.14质量％的形式添加氧化硅(SiO2)；以成为1.90质量％的形式添加碳酸钙(CaCO3)；以成为0.45质量％的形式添加山梨醇。另外，添加在配合工序中没有添加的氧化钴的剩余的一半。使用湿式球磨机对该混合物进行37小时的微粉碎，从而获得浆料(以上为粉碎工序)。
以固体成分浓度成为73～75％的形式调整微粉碎之后所获得的浆料，从而制得湿式成形用浆料。使用湿式磁场成形机在796kA/m(10kOe)的施加磁场中使该湿式成形用浆料成形，从而制得具有直径30mm×厚度15mm的圆柱状的成形体(成形工序)。所获得的成形体在大气中以室温条件进行充分干燥，接着在大气中以1200℃的温度条件进行保持1小时的烧成，由此而获得铁氧体烧结磁铁(烧成工序)。
如以上所述，在实施例1中制造出了P的含量在以P2O5进行换算为0.0008～0.1169范围内分别不同的各种铁氧体烧结磁铁。
(铁氧体烧结磁铁的评价)
首先，实施例1的各个铁氧体烧结磁铁的制造过程中，通过分别计算烧成时成形体的收缩比例，求得厚度[shh(％)＝100-(烧结体的厚度/成形体的厚度)×100]以及直径[shφ(％)＝100-(烧结体的直径/成形体的直径)×100]，据此而计算出烧结前后的缩率比(shh/shφ：c轴方向/a轴方向)。
另外，用感应耦合等离子体(inductively coupled plasma)发光分光分析装置来测定由实施例1所获得的各个铁氧体烧结磁铁的P含量，并作为P2O5换算值来求得。
而且，在对由实施例1所获得的各个铁氧体烧结磁铁的圆柱的上下面实施加工之后，在使用最大施加磁场955kA/m(12kOe)的B-H跟踪器来求得这些的Br以及HcJ，并且，测定Br成为90％时的外部磁场强度(Hk)，据此而求得Hk/HcJ。
所获得的结果被集中表示于表1中。
[表1]
Figure BDA0000129483920000131
从表1中可以证实P2O5的含量如果是在0.001质量％以上的话，就能够获得高Hk/HcJ。即使是在此情况下，也能够充分维持Br以及HcJ。而且，可知如果P2O5的量变多，那么shh/shφ就变大。
[实施例2](铁氧体烧结磁铁的制造)
首先，作为铁氧体磁性材料的主成分的原料准备氧化铁(Fe2O3)、碳酸钙(CaCO3)、碳酸锶(SrCO3)，以烧成后的硬磁铁氧体的组成(主要组成)成为以下的组成式的形式分别对这些原料进行称量。另外，作为副成分的原料准备氧化硅(SiO2)以及磷酸铁(FePO4·nH2O)。在铁氧体磁性材料中，以SiO2的含量成为0.21质量％的形式对SiO2进行称量。另外，在铁氧体磁性材料中，以P的含量成为以P2O5进行换算为表2所表示的值的形式分别变化FePO4·nH2O的配合量。
主要组成的组成式：A1-w-xRwCaxFezMmO19
式中A＝Sr，R＝La、M＝Co。另外，w＝0.127，x＝0.116，z＝10.36，m＝0.11。
接着，用湿式磨碎机对称量后的原料混合10分钟并进行粉碎，从而获得浆料(配合工序)。在对该浆料进行了干燥之后，在大气中以1200℃的温度条件进行保持2小时的预烧(预烧工序)。
用小型棒杆式振动研磨机对获得的预烧粉末实施10分钟的粗粉碎。在这个粗粉碎材料中以在烧成后获得以上所述组成的形式添加已分别进行称量的氧化钴(Co3O4)以及氢氧化镧[La(OH)3]，进一步以相对于粗粉碎材料成为0.5质量％的形式添加氧化硅(SiO2)；以成为1.13质量％的形式添加碳酸钙(CaCO3)；以成为0.45质量％的形式添加山梨醇。使用湿式球磨机对该混合物实行37小时的微粉碎从而获得浆料(以上为粉碎工序)。
在微粉碎之后以固体成分浓度成为73～75％的形式调整所获得的浆料从而制得湿式成形用浆料。使用湿式磁场成形机在796kA/m(10kOe)的施加磁场中使该湿式成形用浆料成形，从而制得具有直径30mm×厚度15mm的圆柱状的成形体(成形工序)。所获得的成形体在大气中以室温条件进行充分干燥，接着在大气中以1220℃的温度条件实行保持1小时的烧成，由此而获得铁氧体烧结磁铁(烧成工序)。
如以上所述，在实施例2中制造出了P的含量在以P2O5进行换算为0.0008～0.1146范围内分别不同的各种铁氧体烧结磁铁。
(铁氧体烧结磁铁的评价)
关于实施例2的各个铁氧体烧结磁铁与实施例1相同分别求得shh(％)、shφ(％)、shh/shφ、P含量、Br、HcJ以及Hk/HcJ。所获得结果被表示于表2中。
[表2]
Figure BDA0000129483920000141
从表2中可以证实P2O5的含量如果是在0.001质量％以上的话那么就能够获得高Hk/HcJ。即使是在此情况也能够充分维持Br以及HcJ。而且，如果P2O5的量变多的话那么就可明确shh/shφ变大。
[实施例3](铁氧体烧结磁铁的制造)
首先，作为铁氧体磁性材料的主成分的原料准备氧化铁(Fe2O3)、碳酸钙(CaCO3)、碳酸锶(SrCO3)，以烧成后的硬磁铁氧体的组成(主要组成)成为以下的组成式的形式分别对这些原料进行称量。另外，作为副成分的原料准备磷酸铁(FePO4·nH2O)。以在铁氧体磁性材料中P的含量成为以P2O5进行换算为表3所表示的值的形式分别变化FePO4·nH2O的配合量。
主要组成的组成式：A1-xCaxFezO19
式中A＝Sr。另外，x＝0.105，z＝10.20。
接着，用湿式磨碎机对称量后的原料混合10分钟并加以粉碎，从而获得浆料(配合工序)。在对该浆料进行了干燥之后，在大气中以1200℃的温度条件实行保持2小时的预烧(预烧工序)。
用小型棒杆式振动研磨机对获得的预烧粉末实施10分钟的粗粉碎。在这个粗粉碎材料中以相对于粗粉碎材料成为0.86质量％的形式添加氧化硅(SiO2)；以成为1.04质量％的形式添加碳酸钙(CaCO3)；以成为0.45质量％的形式添加山梨醇。使用湿式球磨机对该混合物实行39小时的微粉碎从而获得浆料(以上所述为粉碎工序)。
在微粉碎之后以固体成分浓度成为73～75％的形式调整所获得的浆料从而制得湿式成形用浆料。使用湿式磁场成形机在796kA/m(10kOe)的施加磁场中使该湿式成形用浆料成形，从而制得具有直径30mm×厚度15mm的圆柱状的成形体(成形工序)。所获得的成形体在大气中以室温条件进行充分干燥，接着在大气中以1220℃的温度条件实行保持1小时的烧成，由此而获得铁氧体烧结磁铁(烧成工序)。
如以上所述，在实施例3中制造出了P的含量在以P2O5进行换算为0.0008～0.1158范围内分别不同的各种铁氧体烧结磁铁。
(铁氧体烧结磁铁的评价)
关于实施例3的各个铁氧体烧结磁铁与实施例1相同分别求得shh(％)、shφ(％)、shh/shφ、P含量、Br、HcJ以及Hk/HcJ。所获得结果被表示于表3中。
[表3]
Figure BDA0000129483920000151
从表3中可以证实P2O5的含量如果是在0.001质量％以上的话那么就能够获得高Hk/HcJ。即使是在此情况也能够充分维持Br以及HcJ。而，如果P2O5的量变多的话，那么就可明确shh/shφ变大。
[实施例4](铁氧体烧结磁铁的制造)
首先，作为铁氧体磁性材料的主成分的原料准备氧化铁(Fe2O3)、碳酸钙(CaCO3)、碳酸锶(SrCO3)以及硫酸锶(SrSO4)。以烧成后的硬磁铁氧体的组成(主要组成)成为以下所述组成式的形式分别对Fe2O3、CaCO3以及SrCO3进行称量。另外，关于SrSO4是以成为表4所表示的值的形式分别使铁氧体烧结磁铁中的S的含量变化。
主要组成的组成式：A1-w-xRwCaxFezMmO19
式中A＝Sr，R＝La、M＝Co。另外，w＝0.127，x＝0.116，z＝10.36，m＝0.11。
接着，用湿式磨碎机对称量后的原料混合10分钟并加以粉碎，从而获得浆料(配合工序)。在对这浆料实行了干燥之后，在大气中以1200℃的温度条件下实施保持2小时的预烧(预烧工序)。
用小型棒杆式振动研磨机对获得的预烧粉末实施10分钟的粗粉碎。在这个粗粉碎材料中以获得以上所述组成式的形式对氧化钴(Co3O4)以及氢氧化镧[La(OH)3]进行称量并添加。另外，以相对于粗粉碎材料成为0.5质量％的形式添加氧化硅(SiO2)；以成为1.13质量％的形式添加碳酸钙(CaCO3)；以成为0.45质量％的形式添加山梨醇。使用湿式球磨机对该混合物实行37小时的微粉碎从而获得浆料(以上所述为粉碎工序)。
在微粉碎之后以固体成分浓度成为73～75％的形式调整所获得的浆料从而制得湿式成形用浆料。使用湿式磁场成形机在796kA/m(10kOe)的施加磁场中使该湿式成形用浆料成形，从而制得具有直径30mm×厚度15mm的圆柱状的成形体(成形工序)。所获得的成形体在大气中以室温条件进行充分干燥，接着在大气中以1220℃的温度条件实行保持1小时的烧成，由此而获得铁氧体烧结磁铁(烧成工序)。
如以上所述，在实施例4中制造出了S的含量在0.0060～0.1180范围内分别不同的各种铁氧体烧结磁铁。
(铁氧体烧结磁铁的评价)
关于实施例4的各个铁氧体烧结磁铁与实施例1相同分别求得shh(％)、shφ(％)、shh/shφ、Br、HcJ以及Hk/HcJ。另外，用感应耦合等离子体(inductively coupled plasma)发光分光分析装置来测定各个铁氧体烧结磁铁的S含量。这些结果被表示于表4中。
[表4]
Figure BDA0000129483920000171
如表4所示，即使增加铁氧体磁性材料中的S的含量也不会提高Hk/HcJ，关于Hk/HcJ被证实具有与P完全不同的性质。关于shh/shφ具有随着S含量增加而变大的倾向。
[实施例5]
分别使用在实施例1中的将P的含量调整为0.0008质量％的铁氧体磁性材料以及调整为0.0802质量％的铁氧体磁性材料来制作图1所表示的弧段型铁氧体烧结磁铁。具体为除了在获得各个湿式成形用浆料之后以获得弧段形状的形式实行成形工序之外，与实施例1相同地制得铁氧体烧结磁铁。然后，在实施例5中，即使使用任一个铁氧体磁性材料的情况下，也能够以获得与表5所表示的相同的烧结体尺寸的形式分别调整成形体尺寸。为了使用各个铁氧体磁性材料来获得相同烧结体尺寸而必要的各个成形体尺寸被表示于表5中。表5中的OR、IR、宽度以及长度的各个尺寸分别是图2所表示的部分的尺寸。
[表5]
如表5所示在形成相同尺寸的烧结体的情况下，P含量大且shh/shφ大的铁氧体磁性材料被证实能够使用中心角小的成形体。
[实施例6]
除了如表6所表示的那样改变作为目的的烧结体的尺寸之外，其余使用与实施例5相同的2种铁氧体磁性材料来求得为了获得相同的烧结体尺寸而有必要的各个成形体尺寸。所获得的结果被表示于表6中。
[表6]
Figure BDA0000129483920000182
如表6所示在形成相同尺寸的烧结体的情况下，P含量大且shh/shφ大的铁氧体磁性材料被证实能够使用中心角小的成形体。
[实施例7]
除了如表7所表示的那样改变作为目的的烧结体的尺寸之外，其余使用与实施例5相同的2种铁氧体磁性材料来求得为了获得相同的烧结体尺寸而必要的各个成形体尺寸。另外，分别对使用各个铁氧体磁性材料的烧结体的制造实行10000次，随着对其中在烧结体上发生龟裂的次数进行计数而在成形工序中求得对于将湿式成形用浆料充填于模具来说所需要的平均时间。所获得的结果被表示于表7中。
[表7]
如表7所示在形成相同尺寸的烧结体的情况下，P含量大且shh/shφ大的铁氧体磁性材料被证实能够使用中心角小的成形体。另外，P含量大且shh/shφ大的铁氧体磁性材料被确认能够降低在制造中心角大的烧结体的时候的龟裂，另外还能够缩短成形时的充填时间。

Claims (3)

1.一种铁氧体磁性材料，其特征在于，
是一种由硬磁铁氧体构成的铁氧体磁性材料，
P的含量以P2O5换算为0.001质量％以上。
2.如权利要求1所述的铁氧体磁性材料，其特征在于，
P的含量以P2O5换算为0.001～0.1质量％。
3.如权利要求1所述的铁氧体磁性材料，其特征在于，
P的含量以P2O5换算为0.005～0.08质量％。
CN2010800307255A 2009-07-08 2010-07-02 铁氧体磁性材料 Pending CN102473499A (zh)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2009-161930 2009-07-08
JP2009161930 2009-07-08
PCT/JP2010/061341 WO2011004773A1 (ja) 2009-07-08 2010-07-02 フェライト磁性材料

Publications (1)

Publication Number Publication Date
CN102473499A true CN102473499A (zh) 2012-05-23

Family

ID=43429195

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010800307255A Pending CN102473499A (zh) 2009-07-08 2010-07-02 铁氧体磁性材料

Country Status (6)

Country Link
US (2) US8834738B2 (zh)
EP (1) EP2453449B1 (zh)
JP (1) JP5418595B2 (zh)
KR (1) KR101377409B1 (zh)
CN (1) CN102473499A (zh)
WO (1) WO2011004773A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104376948A (zh) * 2014-11-10 2015-02-25 安徽瑞研新材料技术研究院有限公司 一种新型铁氧体磁性材料
CN106601418A (zh) * 2016-11-17 2017-04-26 安徽荣玖智能装备科技有限公司 一种耐压新能源汽车磁力水泵用粉末冶金磁环及其制作方法
CN107098689A (zh) * 2017-06-20 2017-08-29 合肥博之泰电子科技有限公司 一种弱电触头复合导电材料及其生产工艺
CN107564654A (zh) * 2017-09-15 2018-01-09 安徽信息工程学院 一种用于磁性复合材料的无机复合材料iv及其制备方法
CN110114844A (zh) * 2016-12-22 2019-08-09 Tdk株式会社 铁氧体烧结磁铁、铁氧体颗粒、粘结磁铁、电动机和发电机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5603901B2 (ja) * 2012-05-30 2014-10-08 富士フイルム株式会社 六方晶フェライト磁性粉末およびその製造方法、ならびに磁気記録媒体およびその製造方法
JP6492596B2 (ja) * 2013-12-04 2019-04-03 Tdk株式会社 フェライト焼結磁石
JP6583631B2 (ja) * 2016-01-15 2019-10-02 Tdk株式会社 フェライト焼結磁石
JP7338161B2 (ja) * 2019-02-05 2023-09-05 Tdk株式会社 フェライト焼結磁石
CN113380489B (zh) * 2021-05-25 2022-05-20 合泰盟方电子（深圳）股份有限公司 一种磁芯粉末及其制备方法及电感器
CN113929445B (zh) * 2021-09-24 2023-07-21 横店集团东磁股份有限公司 一种永磁铁氧体预烧料的制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563899A (en) * 1967-06-02 1971-02-16 Lucas Industries Ltd Permanent magnet material having strontium ferrite base
US3846323A (en) * 1971-09-01 1974-11-05 Bosch Gmbh Robert Process for making a permanent magnet material
JPS62260724A (ja) * 1986-05-07 1987-11-13 Ishihara Sangyo Kaisha Ltd 磁気記録用強磁性微粉末の製造方法
WO2008047854A1 (en) * 2006-10-19 2008-04-24 Hitachi Metals, Ltd. Radio wave absorption material and radio wave absorber
WO2008126352A1 (ja) * 2007-03-14 2008-10-23 Toda Kogyo Corporation ボンド磁石用フェライト粒子粉末、ボンド磁石用樹脂組成物およびそれらから成る成型体

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5041092A (zh) 1973-08-15 1975-04-15
JPS6238532A (ja) 1985-08-13 1987-02-19 Hitachi Maxell Ltd 磁気記録媒体
JP4821792B2 (ja) 2007-03-29 2011-11-24 Ｔｄｋ株式会社 フェライト焼結磁石の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3563899A (en) * 1967-06-02 1971-02-16 Lucas Industries Ltd Permanent magnet material having strontium ferrite base
US3846323A (en) * 1971-09-01 1974-11-05 Bosch Gmbh Robert Process for making a permanent magnet material
JPS62260724A (ja) * 1986-05-07 1987-11-13 Ishihara Sangyo Kaisha Ltd 磁気記録用強磁性微粉末の製造方法
WO2008047854A1 (en) * 2006-10-19 2008-04-24 Hitachi Metals, Ltd. Radio wave absorption material and radio wave absorber
WO2008126352A1 (ja) * 2007-03-14 2008-10-23 Toda Kogyo Corporation ボンド磁石用フェライト粒子粉末、ボンド磁石用樹脂組成物およびそれらから成る成型体

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104376948A (zh) * 2014-11-10 2015-02-25 安徽瑞研新材料技术研究院有限公司 一种新型铁氧体磁性材料
CN106601418A (zh) * 2016-11-17 2017-04-26 安徽荣玖智能装备科技有限公司 一种耐压新能源汽车磁力水泵用粉末冶金磁环及其制作方法
CN110114844A (zh) * 2016-12-22 2019-08-09 Tdk株式会社 铁氧体烧结磁铁、铁氧体颗粒、粘结磁铁、电动机和发电机
CN107098689A (zh) * 2017-06-20 2017-08-29 合肥博之泰电子科技有限公司 一种弱电触头复合导电材料及其生产工艺
CN107564654A (zh) * 2017-09-15 2018-01-09 安徽信息工程学院 一种用于磁性复合材料的无机复合材料iv及其制备方法

Also Published As

Publication number Publication date
JPWO2011004773A1 (ja) 2012-12-20
US20140361214A1 (en) 2014-12-11
EP2453449A1 (en) 2012-05-16
US20120161062A1 (en) 2012-06-28
EP2453449A4 (en) 2013-04-03
EP2453449B1 (en) 2016-02-17
US9336933B2 (en) 2016-05-10
JP5418595B2 (ja) 2014-02-19
US8834738B2 (en) 2014-09-16
KR20120042917A (ko) 2012-05-03
KR101377409B1 (ko) 2014-04-01
WO2011004773A1 (ja) 2011-01-13

Similar Documents

Publication Publication Date Title
CN102473499A (zh) 铁氧体磁性材料
CN102471162B (zh) 铁氧体磁性材料
TWI434302B (zh) 氧化物磁性材料及其製法、以及肥粒鐵燒結磁石和其製法
KR101347851B1 (ko) 산화물 자성 재료
KR101649242B1 (ko) 페라이트 소결 자석의 제조 방법 및 페라이트 소결 자석
WO2014021426A1 (ja) フェライト磁性材料、フェライト焼結磁石及びモータ
KR20130130766A (ko) 페라이트 소결 자석 및 그 제조 방법
JP6119752B2 (ja) フェライト仮焼体、フェライト焼結磁石の製造方法及びフェライト焼結磁石
JP2012209295A (ja) フェライト焼結磁石
CN111517773A (zh) 铁氧体烧结磁铁
CN110299239B (zh) 铁氧体烧结磁铁及其制造方法
JP5521622B2 (ja) 酸化物磁性材料、フェライト焼結磁石及びフェライト焼結磁石の製造方法
JP3266187B2 (ja) 回転機
JP2001052912A (ja) フェライト磁石材料およびそれを用いた焼結磁石ならびにボンド磁石
EP1389785A1 (en) Oxide magnetic material
JP4924794B2 (ja) フェライト磁性材料の製造方法
JP4543849B2 (ja) フェライト磁性材料
JP2002141212A (ja) 回転機
JPH11307331A (ja) フェライト磁石

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120523