STABILIZATION OF FERROMAGNETIC METAL POWDER

PURPOSE:To obtain highly stable ferromagnetic metal powder by immersing ferromagnetic metal powder in an organic solvent dissolving Al alkoxide compound or/and Al alkyl compound, precipitating and depositing the Al compound on the ferromagnetic metal powder through addition of methanol and giving he...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Hauptverfasser:	HIRAMATSU MASANOBU, TAGAWA KIMITERU
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS CASTING CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES ELECTRICITY FILLING PASTES INDUCTANCES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS 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
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	PURPOSE:To obtain highly stable ferromagnetic metal powder by immersing ferromagnetic metal powder in an organic solvent dissolving Al alkoxide compound or/and Al alkyl compound, precipitating and depositing the Al compound on the ferromagnetic metal powder through addition of methanol and giving heat treatment to the powder. CONSTITUTION:As the Al alkoxide compound or Al alkyl compound to be used, any kind of compounds which are not easily combined with ferromagnetic metal particles and easily dissolve in an ordinary organic solvent dissolving methanol such as toluene and heptane can be used. For example, as the Al alkoxide compound, Al(OC2H5)3, Al(iso-OC3H7)3, Al(sec-OC4H9)3, etc., can be used, and as the Al alkyl compound, Al(CH3)3, Al(C2H5)3, Al(C3H7)3, Al(C4H9)3, etc., can be used. The heat treatment must be conducted in an inactive gas atmosphere, in hydrogen gas, or in a reducing gas atmosphere mainly composed of hydrogen.