RARE EARTH MAGNETIC POWDER APPLIED WITH SURFACE TREATMENT AND ITS PRODUCTION

RARE EARTH MAGNETIC POWDER APPLIED WITH SURFACE TREATMENT AND ITS PRODUCTION

PURPOSE:To obtain powder for a plastic magnet having high resistance to oxidation by hydrolyzing alkoxide of Al, Si, Ti, Zr, Sn, Ni applied on the surface of the rare earth magnetic powder. CONSTITUTION:Alkoxide of >=1 kinds metals among Al, Si, Ti, Zr, Sn, Ni is dissolved and a solvent inert to...

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Bibliographische Detailangaben
Hauptverfasser: MIYAHARA TETSUSHIYUU, MIYAO SATOSHI, OSEKO HISAAKI, ONO HARUHEI, ARAI TADASHI, HAGA YOSHIJI, KIMURA KAZUO
Format: Patent
Sprache:eng
Schlagworte:
ALLOYS
BASIC ELECTRIC ELEMENTS
CASTING
CHEMISTRY
ELECTRICITY
FERROUS OR NON-FERROUS ALLOYS
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
TREATMENT OF ALLOYS OR NON-FERROUS METALS
WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:PURPOSE:To obtain powder for a plastic magnet having high resistance to oxidation by hydrolyzing alkoxide of Al, Si, Ti, Zr, Sn, Ni applied on the surface of the rare earth magnetic powder. CONSTITUTION:Alkoxide of >=1 kinds metals among Al, Si, Ti, Zr, Sn, Ni is dissolved and a solvent inert to rare earth magnetic powder is selected. A soln. dissolved with the above-mentioned metallic alkoxide in said solvent is prepd. Rare earth magnetic powder is wetted in such solvent to apply the metallic alkoxide on the surface of the powder. A slight amt. of water is brought into contact gradually with the surface thereof, and the metallic alkoxide is gradually hydrolyzed and condensated to form a high molecular compound having the three-dimensional network structure approximate to a metallic oxide. The rare earth magnetic powder coated with the completely or incompletely hydrolyzed and condensated matter of the metallic alkoxide is obtd.