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公开(公告)号：US20220081319A1
公开(公告)日：2022-03-17
申请号：US17419346
申请日：2020-02-04
发明人： Shin-ichi OHKOSHI , Asuka NAMAI , Marie YOSHIKIYO , Daisuke KODAMA , Shiho OBATA , Masahiro GOTOH
摘要： An iron-based oxide magnetic powder has good thermal stability and a small change in coercive force even in a high-temperature environment and is one composed of particles of ε-iron oxide in which Fe sites are partially substituted by another metal element. A production method for such an iron-based oxide magnetic powder includes allowing a phosphorus-containing ion to coexist when a precipitate of an iron hydroxide containing a substituent metal element produced by neutralizing an acidic aqueous solution containing a trivalent iron ion and an ion of a metal that partially substitutes Fe sites is coated with silicon oxide using a silane compound.
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2.发明申请公开(公告)号：US20210012936A1
公开(公告)日：2021-01-14
申请号：US16969839
申请日：2019-02-14
发明人： Shin-ichi OHKOSHI , Asuka NAMAI , Marie YOSHIKIYO , Masahiro GOTOH , Toshihiko UEYAMA , Takayuki YOSHIDA
摘要： There is provided a magnetic material that has an excellent electromagnetic wave absorption performance in a wide frequency range even under low temperature and high temperature environments and that ensures the absorption performance, and provided a magnetic material as a mixture of a magnetic material having positive slope of change in coercive force dependent on temperature, and a magnetic material having negative slope of change in coercive force dependent on temperature.
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公开(公告)号：US20170137302A1
公开(公告)日：2017-05-18
申请号：US15318783
申请日：2015-06-18
发明人： Shin-ichi OHKOSHI , Marie YOSHIKIYO , Asuka NAMAI , Hiroko TOKORO , Waka TARORA , Tomomichi NASU , Takayuki YOSHIDA , Manabu TANAKA
CPC分类号： C01G49/06 , C01P2002/72 , C01P2002/77 , C01P2002/90 , C01P2006/42 , G11B5/706 , G11B5/714 , G11B5/84 , H01F1/11
摘要： A magnetic σ-form iron oxide nanopowder is a novel magnetic iron oxide nanopowder having magnetic polarization and spontaneous electric polarization and having physical properties similar to those of half-metals; and a process produces the magnetic nanopowder. The magnetic powder has a composition represented by Fe2O3 and has a crystal structure belonging to the monoclinic system.
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公开(公告)号：US20220375663A1
公开(公告)日：2022-11-24
申请号：US17764229
申请日：2020-09-29
发明人： Shin-ichi OHKOSHI , Asuka NAMAl , Hiroko TOKORO , Marie YOSHIKIYO , Kazuhiro YAMAGA , Yasuto MIYAMOTO , Yuki MINEYAMA , Kenji SAKANE , Tetsuya KAWAHITO
摘要： A raw material solution containing trivalent iron ions, or trivalent iron ions and ions of a metal element that partially substitutes Fe sites, and an alkaline aqueous solution for neutralizing the raw material solution are added to a reaction system to adjust the pH of the reaction system from 1.0 to 3.0 or lower. Hydroxycarboxylic acid is added to the obtained reaction solution and the pH of the reaction system is then neutralized from 7.0 to 10.0 or lower. The obtained precipitate of a substituent metal element-containing iron oxyhydroxide is coated with silicon oxide, followed by heating so as to form particles of ε-iron oxide in which Fe sites are partially substituted by other metal elements, and then, a slurry containing the particles is classified. The iron-based oxide magnetic powder has a particle shape close to a perfect sphere and is suitable for use in a magnetic recording medium.
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公开(公告)号：US20220288633A1
公开(公告)日：2022-09-15
申请号：US17635627
申请日：2020-07-30
摘要： A radio wave absorber film which is thin and exhibits excellent radio wave absorption performance; and a method for producing this radio wave absorber film. The radio wave absorber film formed on a base material layer contains a magnetic body and a binder resin in a radio wave absorption layer; and an aromatic ester-urethane copolymer is used as the binder resin. The glass transition temperature of the binder resin is 100° C. or less, and 0° C. or less. The magnetic body is at least one of an ε-iron oxide, a barium ferrite magnetic body and a strontium ferrite magnetic body
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6.发明申请公开(公告)号：US20210227730A1
公开(公告)日：2021-07-22
申请号：US15734079
申请日：2019-05-30
摘要： A radio wave-absorbing laminate film in which both the top surface and the bottom surface have superior transmission attenuation properties and reflection attenuation capabilities in extremely high-frequency wave bands and higher, and which exhibits excellent radio wave absorption properties even when extremely thin; a production method for the film; and an element containing the film. A radio wave-absorbing laminate film having radio wave-absorbing layers, the radio wave-absorbing laminate film including a center layer, two substrate layers, and two radio wave-absorbing layers, the center layer containing at least one metal layer, and the two substrate layers being laminated on both surfaces of the center layer. With regard to each of the two substrate layers, the radio wave-absorbing layer is laminated on the surface opposite to the center layer, and, the two substrate layers are the same or different, the two radio wave-absorbing layers are the same or different, and at least one of the radio wave-absorbing layers contains a magnetic body.
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7.发明申请公开(公告)号：US20160237331A1
公开(公告)日：2016-08-18
申请号：US15026290
申请日：2014-10-06
发明人： Shin-ichi OHKOSHI , Hiroko TOKORO , Marie YOSHIKIYO , Asuka NAMAI
CPC分类号： C09K5/063 , C01G23/04 , C01P2002/72 , C01P2002/76 , C01P2002/77 , C01P2006/32 , C01P2006/36 , C09K5/02 , F28D20/0034 , F28D20/02 , Y02E60/142
摘要： A heat storage/dissipation material has a constitution in which heat storage/dissipation titanium oxide made of Ti3O5 is dispersed in heat transfer oil in a liquid form, the heat storage/dissipation titanium oxide not undergoing phase transition into a β-phase that has properties of a non-magnetic semiconductor and maintaining a state of a paramagnetic metal as long as the heat storage/dissipation titanium oxide is not subjected to pressure or light for heat dissipation. The heat storage/dissipation material is capable of maintaining a state of storing heat as long as the heat storage/dissipation material is not subjected to the pressure or the light for heat dissipation and is capable of releasing heat when subjected to the pressure or the light for heat dissipation, and therefore is capable of releasing the stored heat at a desired timing.
摘要翻译： 储热耗散材料具有将由Ti 3 O 5构成的储热·散发氧化钛以液体形式分散在传热油中的结构，不会进入相转变为具有性质的β相的储热/ 的非磁性半导体，并且保持顺磁性金属的状态，只要蓄热/耗散氧化钛不经受用于散热的压力或光。 只要蓄热/散热材料不受到压力或散热的光的影响，散热材料就能够保持蓄热状态，并且当受到压力或光线时能够释放热量 用于散热，因此能够在期望的时间释放所存储的热量。
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公开(公告)号：US20210375314A1
公开(公告)日：2021-12-02
申请号：US17401326
申请日：2021-08-13
发明人： Shin-ichi OHKOSHI , Marie YOSHIKIYO , Kenta IMOTO , Kosuke NAKAGAWA , Asuka NAMAI , Hiroko TOKORO , Makoto NAKAJIMA , Masashi SHIRATA , Kenji NAOI
IPC分类号： G11B11/105 , G11B5/706
摘要： Provided is a recording device. The recording device includes: an external magnetic field application unit that is configured to apply an external magnetic field to a magnetic recording medium; a light irradiation unit that is configured to irradiate light; and a light focusing unit that is configured to focus the light from the light irradiation unit by resonating the light to generate an enhanced magnetic field in which a magnetic field of the light is enhanced, in which magnetization of the magnetic recording medium is inverted by applying the external magnetic field and the enhanced magnetic field to the magnetic recording medium.
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公开(公告)号：US20160164187A1
公开(公告)日：2016-06-09
申请号：US14957235
申请日：2015-12-02
发明人： Shin-ichi OHKOSHI , Asuka NAMAI , Marie YOSHIKIYO , Takashi ONO
CPC分类号： H01Q17/007 , C01G49/0018 , C01G49/06 , C01P2004/16 , C01P2004/62 , C01P2004/64 , C09C1/24 , C09D5/32 , H01Q17/004
摘要： A radio wave absorber provided with a radio wave absorbing film formed on a substrate, the radio wave absorber being capable of absorbing radio waves over a broad frequency band and exhibiting superior radio wave absorbing properties even with a radio wave absorbing film thinner than 1 mm. A film forming paste suitable for forming a radio wave absorbing film that is provided in the radio wave absorber. In a radio wave absorber provided with a radio wave absorbing film formed on a substrate, a particular epsilon-type iron oxide is employed in the radio wave absorbing film and relative permittivity of the radio wave absorbing film is set to 6.5 to 65.
摘要翻译： 一种具有形成在基板上的无线电波吸收膜的无线电波吸收体，该无线电波吸收体能够在宽的频带上吸收无线电波，即使使用比1mm小的无线电波吸收膜也具有优异的电波吸收特性。 适用于形成设置在无线电波吸收体中的无线电波吸收膜的成膜糊剂。 在设置有形成在基板上的无线电波吸收膜的无线电波吸收体中，在无线电波吸收膜中使用特定的ε型氧化铁，将无线电波吸收膜的相对介电常数设定为6.5〜65。
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公开(公告)号：US20170288305A1
公开(公告)日：2017-10-05
申请号：US15468623
申请日：2017-03-24
发明人： Shin-ichi OHKOSHI , Asuka NAMAI , Marie YOSHIKIYO , Takashi ONO
CPC分类号： H01Q1/526 , H01Q1/2283 , H01Q1/36 , H01Q1/38 , H01Q1/405 , H01Q3/30 , H01Q9/0407
摘要： A high-frequency antenna element that is easily downsized even when an electromagnetic wave absorber is used, and is capable of protecting a receiving antenna unit by covering the receiving antenna unit, and provides a high-frequency antenna module including the high-frequency antenna element. The high-frequency antenna element includes a substrate, a dielectric layer, a receiving antenna unit, and a coating layer, in which the dielectric layer is laminated on the substrate, the receiving antenna unit is mounted on the dielectric layer, the coating layer covers a surface of the dielectric layer in a portion in which the receiving antenna unit is not mounted while the coating layer is in contact with entire side surfaces of the receiving antenna unit, and the coating layer covers at least a part of an upper surface of the receiving antenna unit.
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