Ferrite powder for bonded magnets, process for the production of the powder, and bonded magnets made by using the same

The invention provides a ferrite powder for bonded magnets which has widened particle size distribution in order to attain favorable flowability and consolidated density and which is reduced in the increase of SFD due to widened particle size distribution and suppressed in the deterioration of orien...

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Bibliographische Detailangaben
Hauptverfasser:	TSUBOI SATORU, IKEDA HIROYA, NAKAUE KAZUYUKI, KOJIMA MASAHIRO, SUENAGA SHINICHI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	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
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Beschreibung
Zusammenfassung:	The invention provides a ferrite powder for bonded magnets which has widened particle size distribution in order to attain favorable flowability and consolidated density and which is reduced in the increase of SFD due to widened particle size distribution and suppressed in the deterioration of orientation and magnetizability. A magnetoplumbite-type ferrite powder for bonded magnets which has a mean particle diameter of 0.20 to less than 5.00[mu]m and contains oxide of at least one transition metal selected from the group consisting of Zr, Ti, Zn, Co, Mn and Ni, wherein the content of particles of 1[mu]m or below in diameter on the basis of the particle size distribution of the magnetoplumbite-type ferrite powder as determined with a laser diffraction particle size distribution analyzer is20mass% or above.