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
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 4
- 229910052760 oxygen Inorganic materials 0.000 claims 4
- 239000001301 oxygen Substances 0.000 claims 4
- 230000007423 decrease Effects 0.000 claims 3
- 230000004907 flux Effects 0.000 claims 1
- 229910052761 rare earth metal Inorganic materials 0.000 claims 1
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。 - 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。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010199666.XA CN111739704B (zh) | 2019-03-25 | 2020-03-20 | R－t－b系烧结磁体 |
| 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)
| Publication Number | Publication Date |
|---|---|
| JP2020161789A JP2020161789A (ja) | 2020-10-01 |
| JP2020161789A5 true JP2020161789A5 (ja) | 2022-02-08 |
| JP7059995B2 JP7059995B2 (ja) | 2022-04-26 |
Family
ID=72639909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2019176506A Active JP7059995B2 (ja) | 2019-03-25 | 2019-09-27 | Ｒ－ｔ－ｂ系焼結磁石 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP7059995B2 (ja) |
| CN (1) | CN111739704B (ja) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220148801A1 (en) * | 2020-11-12 | 2022-05-12 | Shin-Etsu Chemical Co., Ltd. | Method for Manufacturing Rare Earth Sintered Magnet |
| JP7248169B1 (ja) * | 2022-03-22 | 2023-03-29 | 株式会社プロテリアル | Ｒ－ｔ－ｂ系焼結磁石 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4753024B2 (ja) * | 2005-03-24 | 2011-08-17 | Ｔｄｋ株式会社 | Ｒ−ｔ−ｂ系焼結磁石用原料合金、ｒ−ｔ−ｂ系焼結磁石及びその製造方法 |
| US20150059525A1 (en) * | 2012-03-30 | 2015-03-05 | Intermetallics Co., Ltd. | NdFeB SYSTEM SINTERED MAGNET |
| US20150162117A1 (en) * | 2012-06-13 | 2015-06-11 | Hitachi, Ltd. | Sintered magnet and production process therefor |
| JP2014086529A (ja) * | 2012-10-23 | 2014-05-12 | Toyota Motor Corp | 希土類焼結磁石とその製造方法 |
| JP5464289B1 (ja) * | 2013-04-22 | 2014-04-09 | Ｔｄｋ株式会社 | Ｒ−ｔ−ｂ系焼結磁石 |
| 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 (ja) * | 2014-09-11 | 2018-10-31 | 日立金属株式会社 | Ｒ−ｔ−ｂ系焼結磁石の製造方法 |
| JP6642838B2 (ja) * | 2015-02-17 | 2020-02-12 | 日立金属株式会社 | Ｒ−ｔ−ｂ系焼結磁石の製造方法 |
| US11177069B2 (en) * | 2015-07-30 | 2021-11-16 | Hitachi Metals, Ltd. | Method for producing R-T-B system sintered magnet |
| WO2018034264A1 (ja) * | 2016-08-17 | 2018-02-22 | 日立金属株式会社 | Ｒ－ｔ－ｂ系焼結磁石 |
| JP7251917B2 (ja) * | 2016-12-06 | 2023-04-04 | Tdk株式会社 | Ｒ－ｔ－ｂ系永久磁石 |
| US10672544B2 (en) * | 2016-12-06 | 2020-06-02 | Tdk Corporation | R-T-B based permanent magnet |
| US10643789B2 (en) * | 2017-01-31 | 2020-05-05 | Hitachi Metals, Ltd. | Method for producing R-T-B sintered magnet |
-
2019
- 2019-09-27 JP JP2019176506A patent/JP7059995B2/ja active Active
-
2020
- 2020-03-20 CN CN202010199666.XA patent/CN111739704B/zh active Active
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