Method for preparation of permanent magnet

A blended powder including a first powder containing an R2T14B phase as a main phase, and a second powder containing an R2T17 phase at 25wt% or more of the whole is prepared. Herein, R is at least one element selected from the group consisting of all rare-earth elements and Y (yttrium), T is at leas...

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Bibliographic Details
Main Author SEKINO TAKAO,KANEKO YUJI
Format Patent
LanguageEnglish
Published 22.03.2006
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:A blended powder including a first powder containing an R2T14B phase as a main phase, and a second powder containing an R2T17 phase at 25wt% or more of the whole is prepared. Herein, R is at least one element selected from the group consisting of all rare-earth elements and Y (yttrium), T is at least one element selected from the group consisting of all transition elements, and Q is at least one element selected from the group consisting of B (boron) and C (carbon). The blended powder is sintered, so as to manufacture a permanent magnet having a structure in which a rare-earth element included in the second powder is concentrated in a grain surgace region of a main phase.
Bibliography:Application Number: CN20028004360