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1.发明公开MAGNETIC CRYSTAL FOR RADIO WAVE ABSORBING MATERIAL AND RADIO WAVE ABSORBENT 有权FUNKWELLENABSORPTIONSKÖRPER的MAGNETKRISTALLFÜRFUNKWELLENABSORPTIONS
公开(公告)号：EP2058824A1
公开(公告)日：2009-05-13
申请号：EP07806793.1
申请日：2007-08-30
发明人： OHKOSHI, Shin-ichi , KUROKI, Shiro , SAKURAI, Shunsuke , NAMAI, Asuka , SATO, Kimitaka , SASAKI, Shinya
CPC分类号： H05K9/0075 , B82Y30/00 , C01G49/0018 , C01G49/0045 , C01P2002/72 , C01P2004/04 , C01P2004/64 , C01P2006/42 , C04B35/26 , C04B35/62807 , C04B35/62813 , C04B35/62823 , C04B35/62886 , C04B2235/3217 , C04B2235/3274 , C04B2235/3286 , C04B2235/5454 , H01F1/344
摘要： Disclosed is a magnetic crystal for electromagnetic wave absorbing materials, having a structure of ε-M x Fe 2-x O 3 with 0 2 O 3 crystal and which is derived from an ε-Fe 2 O 3 crystal by substituting a part of the Fe site therein with M. In this, M is a trivalent element having an effect of lowering the coercive force Hc of ε-Fe 2 O 3 crystal by the substitution. Concretely, the element M includes Al and Ga. An electromagnetic wave absorber having a packed structure of particles having such a substituent element M-added "M-substituted ε-Fe 2 O 3 crystal" as the magnetic phase may control the electromagnetic wave absorption peak frequency depending on the degree of substitution with the element M, and for example, the invention gives an electromagnetic wave absorber applicable to a 76 GHz band for on-vehicle radars.
摘要翻译： 公开了一种具有0
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公开(公告)号：EP2003094A9
公开(公告)日：2009-05-06
申请号：EP07740945.6
申请日：2007-03-28
发明人： OHKOSHI, Shin-ichi , HASHIMOTO, Kazuhito , SAKURAI, Shunsuke , KUROKI, Shiro , SATO, Kimitaka , SASAKI, Shinya
IPC分类号： C01G49/00 , C04B35/622 , G11B5/706 , H01F1/11 , H01F10/22
CPC分类号： G11B5/70642 , C01G49/0018 , C01P2002/72 , C01P2004/04 , C01P2006/42 , C04B35/26 , C04B35/62807 , C04B2235/3274 , C04B2235/3286 , C04B2235/76 , G11B5/712 , G11B5/714 , H01F1/11
摘要： Disclosed is a magnetic material comprising a crystal of ε-Ga x Fe 2-x O 3 (wherein 0 3+ ion sites of an ε-Fe 2 O 3 crystal with Ga 3+ ions and having X-ray diffraction peaks corresponding to the crystal structure of ε-Fe 2 O 3 . The coercive force of the magnetic material lowers in accordance with the Ga content thereof, and the saturation magnetization thereof has a maximum value.
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公开(公告)号：EP3922606A1
公开(公告)日：2021-12-15
申请号：EP20753178.1
申请日：2020-02-04
发明人： OHKOSHI, Shin-ichi , NAMAI, Asuka , YOSHIKIYO, Marie , KODAMA, Daisuke , OBATA, Shiho , GOTOH, Masahiro
摘要： [Object] To provide an iron-based oxide magnetic powder that has good thermal stability and a small change in coercive force even in a high-temperature environment and that is composed of particles of ε-iron oxide in which Fe sites are partially substituted by another metal element, and a production method for an iron-based oxide magnetic powder.
[Means for Solution] An iron-based oxide magnetic powder that has good thermal stability and a small change in coercive force even in a high-temperature environment and that is composed of particles of ε-iron oxide in which Fe sites are partially substituted by another metal element is obtained by 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.-
公开(公告)号：EP2447965B1
公开(公告)日：2020-01-15
申请号：EP10792171.0
申请日：2010-06-24
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5.发明公开
公开(公告)号：EP3671778A1
公开(公告)日：2020-06-24
申请号：EP20155615.6
申请日：2016-01-18
发明人： OHKOSHI, Shin-ichi , TOKORO, Hiroko , NAKABAYASHI, Koji , NAMAI, Asuka , IMOTO, Kenta , MASADA, Kenji
摘要： The present invention relates to a method for producing an oriented body containing ε iron oxide.
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6.发明公开MAGNETIC IRON OXIDE NANOPARTICLE POWDER, PROCESS FOR PRODUCING SAME, THIN FILM OF MAGNETIC IRON OXIDE NANOPARTICLES COMPRISING SAID MAGNETIC IRON OXIDE NANOPARTICLE POWDER, AND PROCESS FOR PRODUCING SAME 审中-公开磁性氧化铁纳米颗粒粉末，方法及其生产，氧化铁纳米粒子薄膜，所述磁磁性氧化铁纳米颗粒粉末和方法及其生产
公开(公告)号：EP2990382A1
公开(公告)日：2016-03-02
申请号：EP14788025.6
申请日：2014-04-24
发明人： OHKOSHI, Shin-ichi , YOSHIKIYO, Marie , NAMAI, Asuka , TOKORO, Hiroko , TARORA, Waka , YOSHIDA, Takayuki , TANAKA, Manabu
CPC分类号： H01F1/0551 , C01G49/06 , C01P2002/72 , C01P2004/03 , C01P2004/04 , C01P2004/64 , C01P2004/84 , C01P2006/42 , H01F1/0054
摘要： There is provided an iron oxide magnetic nanoparticle powder having a ferromagnetic property even if the particles have an average particle size of 15 nm or less, preferably 10 nm or less, and a method of producing the same, an iron oxide magnetic nanoparticle thin film containing the iron oxide magnetic nanoparticle powder and a method of producing the same, wherein the iron oxide magnetic nanoparticles having an ε-Fe 2 O 3 single phase, having the average particle size of 15 nm or less, and further 10 nm or less, are generated by using β-FeO(OH) (iron oxide hydroxide) nanoparticles as a starting material, and coating the (iron oxide hydroxide) nanoparticles with silicon oxide, and applying heat treatment thereto under an atmospheric air, and further the iron oxide magnetic nanoparticle thin film is obtained by using the iron oxide magnetic nanoparticles.
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公开(公告)号：EP2003094B1
公开(公告)日：2011-08-17
申请号：EP07740945.6
申请日：2007-03-28
发明人： OHKOSHI, Shin-ichi , HASHIMOTO, Kazuhito , SAKURAI, Shunsuke , KUROKI, Shiro , SATO, Kimitaka , SASAKI, Shinya
CPC分类号： G11B5/70642 , C01G49/0018 , C01P2002/72 , C01P2004/04 , C01P2006/42 , C04B35/26 , C04B35/62807 , C04B2235/3274 , C04B2235/3286 , C04B2235/76 , G11B5/712 , G11B5/714 , H01F1/11
摘要： This invention provides a magnetic material that has an X-ray diffraction peak corresponding to the crystal structure of ε-Fe2O3 and is formed of a crystal of ε-GaxFe2-xO3, provided by replacing a part of Ga3+ ion site in the ε-Fe2O3 crystal with Ga3+ ion, wherein 0
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公开(公告)号：EP3780023A1
公开(公告)日：2021-02-17
申请号：EP19776115.8
申请日：2019-03-26
摘要： [Problem] To provide a method for producing iron based oxide magnetic powder that has a narrow particle size distribution and a small content of fine particles that do not contribute to the magnetic recording characteristics, and consequently has a narrow coercive force distribution and is suitable for the enhancement of the recording density of the magnetic recording medium. [Solution] ε-Type iron based oxide magnetic powder is obtained by a wet method, then a tetraalkylammonium salt as a surface modifier is added to a slurry containing the magnetic powder to make a concentration of 0.009 mol/kg or more and 1.0 mol/kg or less, and simultaneously to make pH of 11 or more and 14 or less, and the slurry is subjected to a dispersion treatment and then classified, so as to provide iron based oxide magnetic powder having a narrow particle size distribution and a narrow coercive force distribution.
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公开(公告)号：EP3473599A1
公开(公告)日：2019-04-24
申请号：EP18197222.5
申请日：2010-09-30
发明人： OHKOSHI, Shin-ichi , SAKURAI, Shunsuke , NAMAI, Asuka , UMEDA, Sayaka , HACHIYA, Hiroshi , MATSUMOTO, Kazuyuki , GOTOH, Takashi
摘要： To provide a method for improving a coercive force of epsilon-type iron oxide particles. Specifically, to provide a method for improving the coercive force of an epsilon-type iron oxide comprising: substituting Fe-site of the epsilon-type iron oxide with other element, while not substituting Fe of D-site in the epsilon-type iron oxide with other element, and the epsilon type iron oxide.
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10.发明公开
公开(公告)号：EP3385951A1
公开(公告)日：2018-10-10
申请号：EP16870689.3
申请日：2016-11-30
发明人： OHKOSHI, Shin-ichi , IMOTO, Kenta , ANAN, Shizuka , NAMAI, Asuka , MASADA, Kenji
CPC分类号： G11B5/70605 , C01G49/00 , C01G55/00 , C01G55/002 , C01P2002/54 , C01P2006/42 , G11B5/02 , G11B5/706 , G11B5/852 , G11B2005/0024 , H01F1/11
摘要： There is provided an oriented body containing platinum group-substituted-ε iron oxide particles typified by Rh-substituted ε-iron oxide or Ru-substituted ε-iron oxide applicable to MAMR, MIMR, or F-MIMR system, and a technique related thereto, containing platinum group element-substituted ε-iron oxide particles in which a part of ε-iron oxide is substituted with at least one element of platinum group elements, as magnetic particles wherein the degree of orientation of the magnetic particles defined by the degree of orientation = SQ (direction of magnetization easy-axes) / SQ (direction of magnetization hard-axes) exceeds 5.0, and a coercive force exceeds 31 kOe.
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