Method for preparation of permanent magnet

准备包括以所含R#-[2]T#-[14]B相为主相的第一粉末、和R#-[2]T#-[17]相的含量占整体的25wt％以上的第二粉末的混合粉末。其中，R为选自所有稀土类元素及Y(钇)中的至少1种，T为选自所有过渡元素中的至少1种，Q为选自B(硼)及C(碳)中的至少1种。通过对上述混合粉末进行烧结，就能制备具有第二粉末中所含稀土类元素被浓缩于主相外壳的组织的永久磁体。 A blended powder including a first powder containing an R2T14B phase as a main phase, and a second powder containing...

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Bibliographic Details
Main Authors SEKINO TAKAO, KANEKO YUJI
Format Patent
LanguageChinese
English
Published 14.04.2004
Edition7
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:准备包括以所含R#-[2]T#-[14]B相为主相的第一粉末、和R#-[2]T#-[17]相的含量占整体的25wt％以上的第二粉末的混合粉末。其中，R为选自所有稀土类元素及Y(钇)中的至少1种，T为选自所有过渡元素中的至少1种，Q为选自B(硼)及C(碳)中的至少1种。通过对上述混合粉末进行烧结，就能制备具有第二粉末中所含稀土类元素被浓缩于主相外壳的组织的永久磁体。 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