Powder for magnetic ferrite, magnetic ferrite, multilayer ferrite components and production method thereof

• Main Authors: NAKANO ATSUYUKI, NAKAHATA ISAO
• Format: Patent
• Language: English
• Published: 30.09.2003
• Edition: 7
• Subjects: ARTIFICIAL STONE; BASIC ELECTRIC ELEMENTS; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; CONCRETE; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS; INDUCTANCES; INORGANIC CHEMISTRY; LIME, MAGNESIA; MAGNETS; METALLURGY; REFRACTORIES; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TRANSFORMERS; TREATMENT OF NATURAL STONE

A multilayer ferrite component is produced with powder for magnetic ferrite, characterized by having the composition of Fe2O3: 40 to 51 mol %, CuO: 7 to 30 mol %, ZnO: 0.5 to 35 mol % and MgO: 5 to 35 mol %, in which a peak of particle size distribution positions in range of 0.3 to 1.2 mum. This MgCuZn ferrite uses such powders of less deterioration in a permeability mu and a peak position of particle size distribution in range of 0.3 to 1.2 mum, thereby enabling a co-firing together with Ag or Ag alloys. It is provided a magnetic ferrite of less deterioration in a magnetic characteristic, in particular a permeability mu against stress and enabling to be sintered at low temperature sintering, that is, below the melting points of Ag or Ag alloys used as electrode materials.