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1. 发明专利

JP4234581B2 Its production method and a motor and rare earth magnet 有权
公开(公告)号：JP4234581B2
公开(公告)日：2009-03-04
申请号：JP2003430850
申请日：2003-12-25
申请人：日産自動車株式会社 , 株式会社日立製作所
发明人：祐一佐通 , 眞加納 , 又洋小室 , 秀昭小野 , 宗勝島田 , 宜郎川下 , 典行渡部 , 哲朗田湯
IPC分类号： B22F1/02 , H01F1/053 , C22C33/02 , C22C38/00 , H01F1/06 , H01F1/08 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a rare earth magnet having a high electric resistance in which lowering of magnet characteristics is minimized, and to provide its production process. SOLUTION: Surface of magnetic powder for rare earth magnet is coated partially, more preferably entirely, with an amorphous rare earth oxide containing carbon represented by general formula (I) and a rare earth magnet is produced by compression molding the magnetic powder. The general formula (I): RO x C y (where R is terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thorium (Tm), ytterbium (Yb) or lutetium (Lu)). COPYRIGHT: (C)2005,JPO&NCIPI

2. 发明专利

JP4238114B2 High-resistance rare earth powder for the magnet and its manufacturing method, and a rare-earth magnet and a method for manufacturing the same, and the rotor motor motor 有权
公开(公告)号：JP4238114B2
公开(公告)日：2009-03-11
申请号：JP2003377626
申请日：2003-11-07
申请人：日産自動車株式会社 , 株式会社日立製作所
发明人：祐一佐通 , 眞加納 , 又洋小室 , 秀昭小野 , 宗勝島田 , 典行渡部 , 哲朗田湯
IPC分类号： B22F1/02 , H01F1/09 , B22F3/02 , H01F1/053 , H01F1/06 , H01F41/02 , H02K1/27 , H02K15/03
摘要： PROBLEM TO BE SOLVED: To provide powder for high-resistance rare earth magnet where the deterioration of magnetic character is minimized, and provide a manufacturing method of the powder, a rare earth magnet, a method for manufacturing the rare earth magnet, a rotor for a motor using the rare earth magnet, and the motor using the same. SOLUTION: In the powder for high resistant rare earth magnet, at least a part of the surface of rare earth magnet particles is coated with a compound containing at least one kind of rare earth oxides as terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thorium (Tm), ytterbium (Yb) and lutetium (Lu), and a metal compound containing at least on kind of Al 2 O 3 , SiO 2 , silicon nitride, TiO 2 , ZnO and ZrO 2 . COPYRIGHT: (C)2005,JPO&NCIPI

3. 发明专利

JP4029714B2 High coercivity anisotropic magnet and a method of manufacturing the same 有权
公开(公告)号：JP4029714B2
公开(公告)日：2008-01-09
申请号：JP2002297065
申请日：2002-10-10
申请人：日産自動車株式会社
发明人：眞加納 , 秀昭小野 , 宗勝島田 , 哲朗田湯
IPC分类号： B22F1/00 , H01F41/02 , C21D6/00 , C22C38/00 , H01F1/053
摘要： PROBLEM TO BE SOLVED: To improve heat-proof characteristic by improving the coercive force of the HDDR powder and also improving the limit of the temperature of the magnet for the magnet powder using the HDDR method. SOLUTION: The HDDR powder and a rare earth oxide are mixed and are then subsequently subjected to a heat treatment. The HDDR powder and Dy203 sample A have been manufactured by the heat treatment for 0.5 hour under the Ar flow of the powder mixing the Dy203 powder of 5wt% for the HDDR powder which has been obtained by conducting, at 850°C, the H2 flow and pressure reduction process to the mother alloy in the composition of Nd=12.6, Fe=63.1, Co=17.4, B=6.5, Zr= 0.1, Ga= 0.3. COPYRIGHT: (C)2004,JPO

4. 发明专利

JP5057211B2 Amorphous metal molded article and a method of manufacturing the same 有权
公开(公告)号：JP5057211B2
公开(公告)日：2012-10-24
申请号：JP2007010945
申请日：2007-01-22
申请人：日産自動車株式会社
发明人：宏規坂元 , 優大和田 , 宜郎川下 , 哲朗田湯
IPC分类号： B22F3/00 , C22C33/02 , C22C45/02 , H01F1/22

5. 发明专利

JP4482861B2 Rare earth magnet powder and a method of manufacturing the same which is excellent in magnetic anisotropy and thermal stability 有权
公开(公告)号：JP4482861B2
公开(公告)日：2010-06-16
申请号：JP2003370054
申请日：2003-10-30
申请人：日産自動車株式会社
发明人：亮治中山 , 眞加納 , 秀昭小野 , 宗勝島田 , 宜郎川下 , 克彦森 , 哲朗田湯
IPC分类号： B22F1/00 , B22F9/00 , B22F3/00 , B22F3/14 , B22F3/15 , B22F9/04 , C22C33/02 , C22C38/00 , H01F1/053 , H01F1/06
摘要： PROBLEM TO BE SOLVED: To provide a powder of a rare-earth magnet superior in magnetic anisotropy and thermal stability, and to provide a manufacturing method therefor. SOLUTION: The powder of the rare-earth magnet has a chemical composition comprising 5-20% R, (wherein R represents one or more elements among rare earth elements including Y and excluding Dy and Tb), one or two elements of Dy and Tb in an amount of 0.01-5%, 3-20% B, and 0.1-50% Co and 0.001-5% M, as needed, and the balance Fe with unavoidable impurities; has a particle size of 10-1,000 μm by average; and has a layer mainly containing one or two elements of Dy and Tb and having a thickness of 0.05-50 μm so as to cover a 70% or larger area of the whole surface. The above Dy-Tb-rich layer contains such a high concentration of one or two elements of Dy and Tb that when they are detected by wavelength dispersive X-ray spectroscopy, the maximum intensity in the layer is 1.2 to 5 times higher than average intensity in a central particle region within the 1/3 length of the particle diameter. COPYRIGHT: (C)2005,JPO&NCIPI

6. 发明专利

JP4160469B2 Manufacturing method of the rotor core steel plate 有权
公开(公告)号：JP4160469B2
公开(公告)日：2008-10-01
申请号：JP2003276318
申请日：2003-07-17
申请人：新日本製鐵株式会社 , 日産自動車株式会社
发明人：猛久保田 , 光夫内山 , 眞加納 , 坂田　　尚志 , 優大和田 , 秀昭小野 , 宗勝島田 , 敏光松岡 , 哲朗田湯 , 洋介黒崎
IPC分类号： H02K1/22 , H02K15/03 , H02K1/27 , H02K15/12 , H02K21/14

7. 发明专利

JP5555993B2 Rare earth permanent magnet alloy and a method of manufacturing the same 有权
公开(公告)号：JP5555993B2
公开(公告)日：2014-07-23
申请号：JP2008232743
申请日：2008-09-10
申请人：日産自動車株式会社
发明人：洋山元 , 哲朗田湯 , 正志大村 , 敬造尾谷 , 崇生藪見 , 早人橋野
IPC分类号： C22C38/00 , C21D6/00 , H01F1/057
CPC分类号： H01F1/0579 , B22F9/007 , B22F2009/048 , B82Y25/00 , C22C1/0491 , C22C33/0257 , C22C38/005 , C22C2202/02 , H01F1/058
摘要： A rare earth permanent magnet alloy with a high coercive force is disclosed. The rare earth permanent magnet alloy comprises: a rare earth-iron-boron type magnetic phase (R 2 Fe 14 B type magnetic phase) constituting a parent phase; and a defect structure. The parent phase contains the defect structure. Displacement of magnetic domain wall of the R 2 Fe 14 B type magnetic phase is prevented by the defect structure, thereby improving coercive force.

8. 发明专利

JP5125818B2 Magnetic material molded product and manufacturing method thereof 有权
公开(公告)号：JP5125818B2
公开(公告)日：2013-01-23
申请号：JP2008173879
申请日：2008-07-02
申请人：日産自動車株式会社
发明人：宜郎川下 , 宏規坂元 , 哲朗田湯
IPC分类号： H01F1/08 , H01F1/057 , H01F1/09 , H01F41/02 , H02K1/27 , H02K15/03
CPC分类号： Y02T10/641
摘要： PROBLEM TO BE SOLVED: To provide a magnetic substance formed body that reduces the usage of expensive elements while maintaining high coercive force and further has superior heat resistance in a motor environment etc. SOLUTION: A concentration phase containing a concentration element having higher element density than average density in magnetic particles is incorporated in the interface between the magnetic particles constituting the magnetic substance formed body and an insulating film. Further, when the magnetic substance formed body is manufactured by molding with a bulk magnet by forming the insulating film on a surface of magnetic powder and then heating it in a pressure applied state, the surface of the magnetic powder is coated with a prescribed low-fusion-point material or its precursor before the insulating film is formed. Then, the insulating film is formed and the magnetic substance formed body is obtained through the heating and pressure application processing (molding processing) at prescribed temperature. Alternatively, while oxygen concentration in an atmosphere is increased in a pressure-reduced state, ionized metal elements are vapor-deposited on the surface of the magnetic powder to form an insulating film containing the metal elements on the surface of the magnetic powder, thus obtaining insulating coating magnetic powder. Then the obtained insulating coating magnetic powder is heated in a pressure-reduced state to obtain the magnetic substance formed body. COPYRIGHT: (C)2009,JPO&INPIT

9. 发明专利

JP4618557B2 Soft magnetic alloy compacts and a method of manufacturing the same 有权
公开(公告)号：JP4618557B2
公开(公告)日：2011-01-26
申请号：JP2006039224
申请日：2006-02-16
申请人：日産自動車株式会社
发明人：宏規坂元 , 優大和田 , 宜郎川下 , 哲朗田湯
IPC分类号： H01F1/24 , B22F1/00 , B22F1/02 , B22F3/00 , B22F3/14 , H01F1/153 , H01F27/24 , H01F41/02
摘要： PROBLEM TO BE SOLVED: To provide a soft magnetic alloy consolidation object capable of being preferably used as a magnetic core for a motor for an electric automobile, a hybrid car or the like, and to provide a manufacturing method for the soft magnetic alloy consolidation object. SOLUTION: The soft magnetic alloy consolidation object is manufactured by treating at least one kind of amorphous alloy powder by a pressure molding. In the compact, the amorphous alloy powder of 50 to 99 vol.% has an insulator film on its surface while using the whole volume of the amorphous alloy powder as a reference, and the amorphous alloy powder of 1 to 50 vol.% does not have the insulator film on its surface in the amorphous alloy powder. The manufacturing method contains a process (1) in which powder having no insulator film on the surface of the amorphous alloy powder and powder having the insulator film on the surface of the amorphous alloy powder are mixed so that each content reaches 1 to 50 vol.% and 50 to 99 vol.%, while using the whole volume of the amorphous alloy powder as the reference. The manufacturing method further contains the process (2) treating powder obtained in the process (1) by the pressure molding. COPYRIGHT: (C)2007,JPO&INPIT

10. 发明专利

JP3997764B2 Exchange spring magnet and a method of manufacturing the same 有权
公开(公告)号：JP3997764B2
公开(公告)日：2007-10-24
申请号：JP2001356892
申请日：2001-11-22
申请人：日産自動車株式会社
发明人：眞加納 , 秀昭小野 , 宗勝島田 , 哲朗田湯
IPC分类号： C21D6/00 , H01F1/053 , C22C38/00 , H01F1/057 , H01F41/02 , H02K1/27 , H02K15/03
CPC分类号： B82Y25/00 , H01F1/0579
摘要： PROBLEM TO BE SOLVED: To provide an exchange-spring magnet that contains very fine crystal grains and has excellent characteristics with regard to both density and coercive force. SOLUTION: The exchange spring magnet is manufactured by producing an alloy containing an amorphous portion at least partly from an alloy for magnet containing Dy and V in addition to Nd, Fe, and B by the liquid quenching method or mechanical alloying process and heat-treating the partially amorphous alloy.

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