Residuum rare earth magnet

A permanent magnet for an MRI scanner is made by removing extraneous elements from an ore containing rare earth elements to leave elements Pr and Nd therein, and then selectively stripping therefrom a portion of the element Nd as a byproduct to leave an ore residuum including both elements Pr and Nd...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BENZ MARK GILBERT, SHEI JULIANA CHING
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS BASIC ELECTRIC ELEMENTS CHEMISTRY DIAGNOSIS ELECTRICITY FERROUS OR NON-FERROUS ALLOYS HUMAN NECESSITIES HYGIENE IDENTIFICATION INDUCTANCES MAGNETS MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES MEDICAL OR VETERINARY SCIENCE METALLURGY PHYSICS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SURGERY TESTING TRANSFORMERS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	A permanent magnet for an MRI scanner is made by removing extraneous elements from an ore containing rare earth elements to leave elements Pr and Nd therein, and then selectively stripping therefrom a portion of the element Nd as a byproduct to leave an ore residuum including both elements Pr and Nd therein. The residuum is alloyed with a transition metal to form an alloy therewith. The alloy is then formed into a rare earth permanent magnet configured for use in the MRI scanner.