ACICULAR IRON OXIDE GRANULE AND ITS PRODUCTION

PURPOSE: To obtain acicular iron oxide granules having high fillability, high coercive force and narrow coercive force distribution and fit to produce a magnetic recording medium having satisfactory surface properties. CONSTITUTION: Acicular iron oxide hydrate powder or acicular iron oxide powder ha...

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Bibliographische Detailangaben
Hauptverfasser:	IKEGUCHI MASAAKI, FUJII SHIGEO
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CASTING CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F CORRECTING FLUIDS DYES FILLING PASTES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS INORGANIC CHEMISTRY MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PHYSICS POLISHES POWDER METALLURGY TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	PURPOSE: To obtain acicular iron oxide granules having high fillability, high coercive force and narrow coercive force distribution and fit to produce a magnetic recording medium having satisfactory surface properties. CONSTITUTION: Acicular iron oxide hydrate powder or acicular iron oxide powder having 0.05-0.3μm major axis size of primary particles and an axial ratio of 4-12 is granulated to obtain the objective acicular iron oxide hydrate granules or acicular iron oxide granules having 1-20mm average diameter and 0.15-0.3g/cm bulk density.