SAMARIUM-IRON-NITROGEN BASED RARE EARTH MAGNET

To provide a Sm-Fe-N based rare earth magnet improved in coercive force.SOLUTION: A Sm-Fe-N based rare earth magnet comprises Sm-Fe-N based crystal grains, and compound phases containing Fe, O, C and Zn. An atomic ratio of Fe to Sm in the compound phase is larger than an atomic ratio of Fe to Sm in...

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Bibliographic Details
Main Authors FUKUCHI EIICHIRO, YOKOTA HIROTAKA
Format Patent
LanguageEnglish
Japanese
Published 07.10.2022
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRICITY
INDUCTANCES
MAGNETS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Summary:To provide a Sm-Fe-N based rare earth magnet improved in coercive force.SOLUTION: A Sm-Fe-N based rare earth magnet comprises Sm-Fe-N based crystal grains, and compound phases containing Fe, O, C and Zn. An atomic ratio of Fe to Sm in the compound phase is larger than an atomic ratio of Fe to Sm in the Sm-Fe-N based crystal grain. A concentration of O in the compound phase is 3 at% or more, and a concentration of C in the compound phase is 4 at% or more.SELECTED DRAWING: None 【課題】保磁力が向上したＳｍ－Ｆｅ－Ｎ系希土類磁石等を提供する。【解決手段】Ｓｍ－Ｆｅ－Ｎ系希土類磁石は、Ｓｍ－Ｆｅ－Ｎ系結晶粒と、Ｆｅ，Ｏ，Ｃ，及び，Ｚｎを含む化合物相と、を含有する。化合物相のＳｍに対するＦｅの原子比は、前記Ｓｍ－Ｆｅ－Ｎ系結晶粒のＳｍに対するＦｅの原子比よりも大きい。化合物相のＯの濃度は３ａｔ％以上である。化合物相のＣの濃度は４ａｔ％以上である。【選択図】なし
Bibliography:Application Number: JP20210051882