Process for preparing magnetic powders containing rare earth elements

Process for preparing magnetic powders containing rare earth elements

The process of the invention is characterised in that the magnetic powders are prepared by mixing solutions containing the water-soluble salts of the rare earth metals and also of iron, of nickel, of cobalt, of copper and of palladium in a concentration of from 1 . 10 M/l to 1.10 M/l with an aqueous...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: GENCEV TODOROV,OGNEMIR, DIMITROVA DRAGIEVA,YOVKA, KRESTEV ILIEV,ILIA, TODOROV BUCKOV,DIMITER, SLAVOMIROVA SLAVCEVA-STAIKOVA,MINA
Format: Patent
Sprache:eng ; ger
Schlagworte:
BASIC ELECTRIC ELEMENTS
CASTING
ELECTRICITY
INDUCTANCES
MAGNETS
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
TRANSPORTING
WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:The process of the invention is characterised in that the magnetic powders are prepared by mixing solutions containing the water-soluble salts of the rare earth metals and also of iron, of nickel, of cobalt, of copper and of palladium in a concentration of from 1 . 10 M/l to 1.10 M/l with an aqueous solution of the reducing agent sodium borohydride or sodium hypophosphite having a concentration of from 0.05 to 1 M/l at a temperature of from 10 DEG C to 90 DEG C and for a reaction time of from 1 to 30 minutes, using a permanent magnet field having an intensity of from 1.10 to 8.10 A/m and with subsequent washing and drying of the powder prepared.