JP2020161789A5 - - Google Patents

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JP2020161789A5
JP2020161789A5 JP2019176506A JP2019176506A JP2020161789A5 JP 2020161789 A5 JP2020161789 A5 JP 2020161789A5 JP 2019176506 A JP2019176506 A JP 2019176506A JP 2019176506 A JP2019176506 A JP 2019176506A JP 2020161789 A5 JP2020161789 A5 JP 2020161789A5
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Prior art keywords
mass
magnet
oxygen
gradually decreases
content
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JP2019176506A
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JP2020161789A (en
JP7059995B2 (en
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Priority to CN202010199666.XA priority Critical patent/CN111739704A/en
Priority to US16/826,380 priority patent/US11239011B2/en
Priority to EP20165258.3A priority patent/EP3716297B1/en
Publication of JP2020161789A publication Critical patent/JP2020161789A/en
Publication of JP2020161789A5 publication Critical patent/JP2020161789A5/ja
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Claims (2)

残留磁束密度（Ｂｒ）が１．４７Ｔ以上、保磁力（ＨｃＪ）が１９００ｋＡ／ｍ以上で、且つ、Ｔｂを含有し、
ＲＬ（ＲＬは軽希土類元素のうち少なくとも一種であり、ＮｄおよびＰｒを必ず含む）を含有し、ＲＬの含有量（ｍａｓｓ％）を[ＲＬ]、酸素の含有量（ｍａｓｓ％）を[酸素]とするとき、
２６．５ｍａｓｓ％≦（[ＲＬ]）－６×[酸素]≦２８．８ｍａｓｓ％であり、かつ、０．０７ｍａｓｓ％≦[酸素]≦０．１５ｍａｓｓ％であり、
磁石表面から磁石内部に向かってＴｂ濃度が漸減する部分と、磁石表面から磁石内部に向かってＰｒ濃度が漸減する部分とを含み、
Ｔｂ含有量が０．３０ｍａｓｓ％以下である、Ｒ－Ｔ－Ｂ系焼結磁石。 The residual magnetic flux density ( Br) is 1.47 T or more, the coercive force (H cJ ) is 1900 kA / m or more, and Tb is contained .
It contains RL (RL is at least one of the light rare earth elements and always contains Nd and Pr), the RL content (mass%) is [RL], and the oxygen content (mass%) is [oxygen]. When
26.5 mass% ≤ ([RL]) -6 × [oxygen] ≤ 28.8 mass%, and 0.07 mass% ≤ [oxygen] ≤ 0.15 mass%.
It includes a portion where the Tb concentration gradually decreases from the magnet surface toward the inside of the magnet and a portion where the Pr concentration gradually decreases from the magnet surface toward the inside of the magnet.
An RTB-based sintered magnet having a Tb content of 0.30 mass% or less . 磁石表面から磁石内部に向かってＧａ濃度が漸減する部分を含む、請求項１に記載のＲ－Ｔ－Ｂ系焼結磁石。 The RTB-based sintered magnet according to claim 1, further comprising a portion where the Ga concentration gradually decreases from the surface of the magnet toward the inside of the magnet.
JP2019176506A 2019-03-25 2019-09-27 RTB-based sintered magnet Active JP7059995B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202010199666.XA CN111739704A (en) 2019-03-25 2020-03-20 R-T-B sintered magnet
US16/826,380 US11239011B2 (en) 2019-03-25 2020-03-23 Sintered R-T-B based magnet
EP20165258.3A EP3716297B1 (en) 2019-03-25 2020-03-24 Sintered r-t-b based magnet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019056142 2019-03-25
JP2019056142 2019-03-25

Publications (3)

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JP2020161789A JP2020161789A (en) 2020-10-01
JP2020161789A5 true JP2020161789A5 (en) 2022-02-08
JP7059995B2 JP7059995B2 (en) 2022-04-26

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JP2019176506A Active JP7059995B2 (en) 2019-03-25 2019-09-27 RTB-based sintered magnet

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JP (1) JP7059995B2 (en)
CN (1) CN111739704A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7248169B1 (en) * 2022-03-22 2023-03-29 株式会社プロテリアル RTB system sintered magnet

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013186864A (en) 2012-03-12 2013-09-19 Osaka Gas Co Ltd Transportation expense application support system
JP5970548B2 (en) * 2012-06-13 2016-08-17 株式会社日立製作所 Sintered magnet and manufacturing method thereof
US10388442B2 (en) * 2013-08-12 2019-08-20 Hitachi Metals, Ltd. R-T-B based sintered magnet and method for producing R-T-B based sintered magnet
JP6414598B2 (en) * 2014-09-11 2018-10-31 日立金属株式会社 Method for producing RTB-based sintered magnet
JP2016133067A (en) 2015-01-20 2016-07-25 株式会社ケーヒン Fuel injection valve with in-cylinder pressure sensor
WO2016133067A1 (en) * 2015-02-17 2016-08-25 日立金属株式会社 Method for manufacturing r-t-b sintered magnet
JP7251917B2 (en) * 2016-12-06 2023-04-04 Tdk株式会社 RTB system permanent magnet

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