公开(公告)号：US20250118471A1

公开(公告)日：2025-04-10

申请号：US18836537

申请日：2023-02-07

Applicant: TODA KOGYO CORP.

Inventor： Hidemi TSUKAMOTO ,  Kozo WATANABE ,  Hideharu MITSUI ,  Yasushi NISHIO

IPC: H01F1/34 ,  C01G49/00 ,  C08K3/22 ,  H05K9/00

Abstract: Provided is a ferrite particle powder for electromagnetic wave absorption that can maintain flexibility and uniformity of physical properties of a sheet even when the sheet is highly filled with the ferrite particle powder and is excellent in electromagnetic wave absorbing performance in a GHz band. The ferrite particle powder is a ferrite particle powder for electromagnetic wave absorption, the ferrite particle powder containing magnetoplumbite-type ferrite represented by a chemical formula of AxFe(12-y)(TizMn(1-z))yO19, where A is at least one selected from Ba, Sr, Ca, and Pb, x is 0.9 to 1.1, y is 5.0 or less, and z is 0.35 to 0.65, and the ferrite particle powder having: a compressed density of 3.00 g/cm3 or more; and an average particle diameter of 0.50 to 3.0 μm determined by an air permeability method (Blaine method).

公开(公告)号：US20170221619A1

公开(公告)日：2017-08-03

申请号：US15515003

申请日：2015-09-29

Applicant: TODA KOGYO CORP.

Inventor： Yasushi NISHIO ,  Satoshi NOMURA ,  Yasuhiko FUJII ,  Hiromitsu SAKURAI

IPC: H01F1/113 ,  C08K3/00 ,  C01G49/00

CPC classification number: H01F1/113 ,  C01G49/0018 ,  C01P2002/70 ,  C01P2004/61 ,  C01P2006/42 ,  C08K3/01 ,  C08K2201/01 ,  H01F1/11

Abstract: The object of the present invention relates to ferrite particles for bonded magnets and a resin composition for bonded magnets which is capable of obtaining a bonded magnet molded product having a good magnetic force and a magnetic waveform as well as high iHc and Hk by injection molding. The present invention aims at providing a bonded magnet molded product using the ferrite particles and the resin composition. The aforementioned object of the present invention can be achieved by ferrite particles for bonded magnets which have a crystal distortion of not more than 0.14 as measured by XRD, and an average particle diameter of not less than 1.30 μm as measured by Fisher method; a resin composition for bonded magnets; and a molded product obtained by injection-molding the resin composition.

公开(公告)号：US20160039128A1

公开(公告)日：2016-02-11

申请号：US14781777

申请日：2014-04-01

Applicant: TODA KOGYO CORP.

Inventor： Yasushi NISHIO ,  Yasuhiko FUJII ,  Hiromitsu SAKURAI

IPC: B29C45/00 ,  C01G49/00

Abstract: The present invention relates to ferrite particles for bonded magnets and a resin composition for bonded magnets which can provide a bonded magnet molded product capable of realizing a high magnetic force and a complicated multipolar waveform owing to such a feature that the ferrite particles are readily and highly oriented against an external magnetic field in a flowing resin upon injection molding, as well as a bonded magnet molded product obtained by injection-molding the above composition. According to the present invention, there are provided ferrite particles for bonded magnets which have a crystallite size of not less than 500 nm as measured in an oriented state by XRD, and an average particle diameter of not less than 1.30 μm as measured by Fisher method; a resin composition for bonded magnets; and a molded product obtained by injection-molding the composition.

Abstract translation: 本发明涉及用于粘结磁体的铁氧体颗粒和用于粘结磁体的树脂组合物，其可以提供能够实现高磁力的粘结磁体模制产品和复杂的多极波形，这是由于铁氧体颗粒容易高度地 在注射成型时与流动树脂中的外部磁场对准，以及通过注射成型上述组合物而获得的粘结磁体成型体。 根据本发明，提供了通过XRD测定的取向状态下的微晶尺寸为500nm以上的粘结磁铁用铁氧体颗粒，通过Fisher法测定的平均粒径为1.30μm以上 ; 用于粘结磁体的树脂组合物; 以及通过注射成型组合物而获得的成型体。

公开(公告)号：US20240033979A1

公开(公告)日：2024-02-01

申请号：US18379809

申请日：2023-10-13

Applicant: TODA KOGYO CORP.

Inventor： Yasushi NISHIO ,  Yasuhiko FUJII ,  Hiromitsu SAKURAI

IPC: B29C45/00 ,  C01G49/00 ,  H01F1/11

CPC classification number: B29C45/0001 ,  C01G49/0036 ,  H01F1/11 ,  C01P2006/42 ,  C01P2006/12 ,  B29K2505/12

Abstract: The present invention relates to ferrite particles for bonded magnets and a resin composition for bonded magnets which can provide a bonded magnet molded product capable of realizing a high magnetic force and a complicated multipolar waveform owing to such a feature that the ferrite particles are readily and highly oriented against an external magnetic field in a flowing resin upon injection molding, as well as a bonded magnet molded product obtained by injection-molding the above composition. According to the present invention, there are provided ferrite particles for bonded magnets which have a crystallite size of not less than 500 nm as measured in an oriented state by XRD, and an average particle diameter of not less than 1.30 μm as measured by Fisher method; a resin composition for bonded magnets; and a molded product obtained by injection-molding the composition.

公开(公告)号：US20160217892A1

公开(公告)日：2016-07-28

申请号：US15025599

申请日：2014-09-30

Applicant: TODA KOGYO CORP.

Inventor： Yasushi NISHIO ,  Hiromitsu SAKURAI ,  Norihiro FUKUSHINA ,  Yasuhiko FUJII

IPC: H01F1/03 ,  C08K3/22 ,  C01G49/00

CPC classification number: H01F1/0306 ,  C01G49/0036 ,  C01G49/0063 ,  C01G49/009 ,  C01P2004/20 ,  C01P2004/22 ,  C01P2004/61 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/11 ,  C01P2006/12 ,  C01P2006/42 ,  C04B35/26 ,  C04B35/6261 ,  C04B35/62645 ,  C04B35/634 ,  C04B2235/3201 ,  C04B2235/3213 ,  C04B2235/3409 ,  C04B2235/5436 ,  C04B2235/5445 ,  C04B2235/6022 ,  C04B2235/77 ,  C08K3/22 ,  C08K2003/2206 ,  C08K2003/2265 ,  H01F1/113

Abstract: According to the present invention, there are provided ferrite particles for bonded magnets and a resin composition for bonded magnets which are capable of producing a bonded magnet molded product having a good tensile elongation and exhibiting excellent magnetic properties, as well as a bonded magnet molded product such as a rotor which is obtained by using the resin composition. The present invention relates to ferrite particles for bonded magnets having a bulk density of not less than 0.5 g/cm3 and less than 0.6 g/cm3 and a degree of compaction of not less than 65%, a resin composition for bonded magnets using the ferrite particles, and a molded product obtained by using the ferrite particles and the resin composition.

Abstract translation: 根据本发明，提供了一种用于粘结磁体的铁氧体颗粒和用于粘结磁体的树脂组合物，其能够制备具有良好的拉伸伸长率和显示出优异磁性的粘结磁体模制产品，以及粘结磁体模制产品 例如通过使用树脂组合物获得的转子。 本发明涉及堆积密度不小于0.5g / cm3且小于0.6g / cm3，压缩度不低于65％的粘结磁体用铁氧体颗粒，使用铁氧体的粘结磁体用树脂组合物 颗粒和通过使用铁氧体颗粒和树脂组合物获得的模制产品。

公开(公告)号：US20230078224A1

公开(公告)日：2023-03-16

申请号：US17984519

申请日：2022-11-10

Applicant: TODA KOGYO CORP.

Inventor： Yasushi NISHIO ,  Hiromitsu SAKURAI ,  Norihiro FUKUSHINA ,  Yasuhiko FUJII

IPC: H01F1/03 ,  C01G49/00 ,  H01F1/113 ,  C04B35/26 ,  C04B35/634 ,  C04B35/626 ,  C08K3/22

Abstract: According to the present invention, there are provided ferrite particles for bonded magnets and a resin composition for bonded magnets which are capable of producing a bonded magnet molded product having a good tensile elongation and exhibiting excellent magnetic properties, as well as a bonded magnet molded product such as a rotor which is obtained by using the resin composition. The present invention relates to ferrite particles for bonded magnets having a bulk density of not less than 0.5 g/cm3 and less than 0.6 g/cm3 and a degree of compaction of not less than 65%, a resin composition for bonded magnets using the ferrite particles, and a molded product obtained by using the ferrite particles and the resin composition.

公开(公告)号：US20190393605A1

公开(公告)日：2019-12-26

申请号：US16481900

申请日：2018-01-29

Applicant: TODA KOGYO CORP.

Inventor： Satoshi NOMURA ,  Jun KOUJIMA ,  Yasushi NISHIO ,  Manato NAKATSUKASA ,  Yasuhiko FUJII

IPC: H01Q7/06 ,  H01Q1/22 ,  G06K19/077

Abstract: The present invention relates to an electronic component, and also relates to an antenna for information communication using a magnetic field component, which is capable of satisfying both of downsizing and improvement in communication sensitivity. The electronic component of the present invention comprises a ferrite core and a coil, in which a ferrite constituting the ferrite core has a spinel structure and comprises Fe, Ni, Zn, Cu and Co as constitutional metal elements, and when contents of the respective constitutional metal elements in the ferrite are calculated in terms of Fe2O3, NiO, ZnO, CuO and CoO, contents of Fe2O3, NiO, ZnO, CuO and CoO in the ferrite are 46 to 50 mol %, 20 to 27 mol %, 15 to 22 mol %, 9 to 11 mol % and 0.01 to 1.0 mol %, respectively, based on a total content of Fe2O3, NiO, ZnO, CuO and CoO.

公开(公告)号：US20160276079A1

公开(公告)日：2016-09-22

申请号：US15033355

申请日：2014-10-30

Applicant: TODA KOGYO CORP.

Inventor： Kazushi NISHIMOTO ,  Yoji OKANO ,  Hiromitsu SAKURAI ,  Kazumi YAMAMOTO ,  Tomohiro DOTE ,  Yasushi NISHIO ,  Yasuhiko FUJII

IPC: H01F1/37 ,  H02J7/02 ,  H02J50/10 ,  H01F38/14

CPC classification number: H01F1/37 ,  C22C2202/02 ,  H01F27/255 ,  H01F38/14 ,  H01F41/0246 ,  H02J7/025 ,  H02J50/10

Abstract: An object of the present invention is to provide a power transmission device for a non-contact power feeder system which has high power transmission efficiency and high impact resistance. The above object of the present invention can be achieved by a soft magnetic ferrite resin composition molded product comprising a filler and a binder, in which the filler comprises soft magnetic ferrite particles having an average particle diameter of 5 to 35 μm, the binder comprises at least one material selected from the group consisting of a thermoplastic resin and a soft polyolefin resin, and the soft magnetic ferrite resin composition molded product has a molding density of 3.2 to 4.7 g/cm3 and a magnetic permeability of 5 to 15, and a power transmission device for a non-contact power feeder system which comprises the above soft magnetic ferrite resin composition molded product.

Abstract translation: 本发明的目的是提供一种具有高功率传输效率和高抗冲击性的非接触式馈电系统的电力传输装置。 本发明的上述目的可以通过包含填料和粘合剂的软磁性铁氧体树脂组合物模制产品来实现，其中填料包括平均粒径为5至35μm的软磁铁氧体颗粒，粘合剂包含在 选自热塑性树脂和软质聚烯烃树脂中的至少一种材料，软磁性铁氧体树脂组合物成型体的成型密度为3.2〜4.7g / cm 3，磁导率为5〜15，功率 包括上述软磁性铁氧体树脂组合物成型体的非接触供电系统的传动装置。