PROCESS FOR PREPARING ACICULAR FERROMAGNETIC IRON PARTICLES, AND THEIR USE

A process for the manufacture of acicular ferromagnetic iron particles by reducing an iron(III) oxide which carries a shape-stabilizing surface coating and has been produced by heating acicular iron(III) oxide hydroxide at 250 DEG -390 DEG C. in an atmosphere containing water vapor at a partial pres...

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Bibliographische Detailangaben
Hauptverfasser:	STECK, WERNER, MAROSI, LASZLO, AUTZEN, HORST, SARNECKI, WILHELM, OHLINGER, MANFRED
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS 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 ELECTRICITY FILLING PASTES INDUCTANCES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS INORGANIC CHEMISTRY MAGNETS 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 SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TRANSFORMERS TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	A process for the manufacture of acicular ferromagnetic iron particles by reducing an iron(III) oxide which carries a shape-stabilizing surface coating and has been produced by heating acicular iron(III) oxide hydroxide at 250 DEG -390 DEG C. in an atmosphere containing water vapor at a partial pressure of not less than 30 mbar, with hydrogen at 275 DEG -425 DEG C.