US 2025/0201457 A1 · Sm-Fe-N-BASED MAGNETIC MATERIAL AND PRODUCTION METHOD THEREOF

Sm-Fe-N-BASED MAGNETIC MATERIAL AND PRODUCTION METHOD THEREOF

AssigneesToyota Jidosha Kabushiki Kaisha, The University of Tokyo, National Institute of Advanced Industrial Science and Technology

InventorsTetsuya SHOJI, Noritsugu SAKUMA, Akihito KINOSHITA, Tetsuya FUKUSHIMA, Hisazumi AKAI, Haruki OKUMURA, Masahiro SAKURAI, Takashi MIYAKE, Taro FUKAZAWA, Keiichi TAMAI

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Abstract

A Sm—Fe—N-based magnetic material in which the use amount of Sm is further reduced while enhancing the saturation magnetization, and a production method thereof, are provided. The present disclosure discloses a Sm—Fe—N-based magnetic material including a main phase having a crystal structure of at least either Th2Zn17 type or Th2Ni17 type, wherein the main phase is represented by the molar ratio formula (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh, where R1 is one or more rare earth elements other than Sm, La and Ce, and Zr, and M is one or more elements other than Fe, Co, Ni and rare earth elements, and an unavoidable impurity element, and 0.09≤x≤0.31, 0.24≤y≤0.60, 0.51≤x+y≤0.75, 0≤z≤0.10, 0≤p+q≤0.10, 0≤s≤0.10, and 2.9≤h≤3.1 are satisfied, and a production method thereof.

Claims5

Dependent claims

A Sm—Fe—N-based magnetic material comprising a main phase having a crystal structure of at least either Th2Zn17 type or Th2Ni17 type, wherein

the main phase is represented by the molar ratio formula (Sm(1-x-y-z)LaxCeyR1z)2(Fe(1-p-q-s)CopNiqMs)17Nh, where R1 is one or more rare earth elements other than Sm, La and Ce, and Zr, and M is one or more elements other than Fe, Co, Ni and rare earth elements, and an unavoidable impurity element, and
0.09
≤
x
≤
0.31
,
0.24
≤
y
≤
0.6
,
0.51
≤
x
+
y
≤
0.75
,
0
≤
z
≤
0.1
,
0
≤
p
+
q
≤
0.1
,
0
≤
s
≤
0.1
,
and
⁢
2.9
≤
h
≤
3.1
are
⁢
satisfied
.

49 more elements

Dependencies are inferred from the claim text.