公开(公告)号：EP2666563A4

公开(公告)日：2018-04-04

申请号：EP12736352

申请日：2012-01-19

申请人： TODA KOGYO CORP ,  UNIV TOHOKU

发明人： TAKAHASHI MIGAKU ,  OGAWA TOMOYUKI ,  OGATA YASUNOBU ,  KOBAYASHI NAOYA ,  POLWATTA GALLAGE CHAMMIKA RUWAN ,  KOHARA KAORI

IPC分类号： B22F1/00 ,  B22F1/02 ,  B22F9/22 ,  C01B21/06 ,  H01F1/06 ,  H01F1/08 ,  H01F7/02 ,  H01F41/02

CPC分类号： H01F1/01 ,  B22F1/02 ,  B22F9/22 ,  B22F2999/00 ,  C01B21/0622 ,  C01P2004/54 ,  C01P2004/61 ,  C01P2006/12 ,  C01P2006/42 ,  C22C21/00 ,  C22C29/16 ,  H01F1/065 ,  H01F1/083 ,  H01F1/086 ,  H01F41/00 ,  H01F41/0266 ,  B22F2201/013

摘要： The present invention relates to ferromagnetic particles capable of exhibiting a high purity and excellent magnetic properties from the industrial viewpoints and a process for producing the ferromagnetic particles, and also provides an anisotropic magnet, a bonded magnet and a compacted magnet which are obtained by using the ferromagnetic particles. The ferromagnetic particles comprising an Fe 16 N 2 compound phase in an amount of not less than 80% as measured by Mössbauer spectrum and each having an outer shell in which FeO is present in the form of a film having a thickness of not more than 5 nm according to the present invention can be produced by subjecting iron oxide or iron oxyhydroxide having an average major axis diameter of 40 to 5000 nm and an aspect ratio (major axis diameter/minor axis diameter) of 1 to 200 as a starting material to dispersing treatment to prepare aggregated particles; subjecting the iron compound particles passed through a mesh to hydrogen reducing treatment at a temperature of 160 to 420°C; and then subjecting the resulting particles to nitridation treatment at a temperature of 130 to 170°C.

公开(公告)号：EP3123484A4

公开(公告)日：2017-06-14

申请号：EP15768799

申请日：2015-03-26

申请人： UNIV MINNESOTA ,  UT-BATTELLE LLC ,  UNIV TENNESSEE RES FOUND

发明人： WANG JIAN-PING ,  JIANG YANFENG ,  BRIDGES CRAIG A ,  BRADY MICHAEL P ,  RIOS ORLANDO ,  MEISNER ROBERTA A ,  ALLARD LAWRENCE F ,  LARA-CURZIO EDGAR ,  HE SHIHAI

IPC分类号： H01F1/00 ,  B22F1/00 ,  B22F1/02 ,  B22F9/14 ,  C22C33/02 ,  C22C38/00 ,  C23C14/06 ,  C23C14/34 ,  C23C14/58 ,  H01F1/047 ,  H01F1/06 ,  H01F41/02

CPC分类号： H01F1/047 ,  B22F1/0018 ,  C22C38/001 ,  C22C38/002 ,  C22C2202/02 ,  C23C14/0036 ,  C23C14/0605 ,  C23C14/165 ,  C23C14/185 ,  C23C14/3414 ,  C23C14/3464 ,  C23C14/566 ,  C23C14/568 ,  C23C14/5806 ,  C23C14/586 ,  H01F1/0054 ,  H01F1/065 ,  H01F41/0253

摘要： The disclosure describes techniques for forming nanoparticles including Fe16N2 phase. In some examples, the nanoparticles may be formed by first forming nanoparticles including iron, nitrogen, and at least one of carbon or boron. The carbon or boron may be incorporated into the nanoparticles such that the iron, nitrogen, and at least one of carbon or boron are mixed. Alternatively, the at least one of carbon or boron may be coated on a surface of a nanoparticle including iron and nitrogen. The nano particle including iron, nitrogen, and at least one of carbon or boron then may be annealed to form at least one phase domain including at least one of Fe16N2, Fe16(NB)2, Fe16(NC)2, or Fe16(NCB)2.

摘要翻译： 本公开描述了用于形成包括Fe 16 N 2相的纳米粒子的技术。 在一些实例中，可以通过首先形成包括铁，氮和碳或硼中的至少一种的纳米颗粒来形成纳米颗粒。 可以将碳或硼结合到纳米颗粒中，使得铁，氮以及碳或硼中的至少一种被混合。 或者，可以将碳或硼中的至少一种涂覆在包括铁和氮的纳米颗粒的表面上。 包括铁，氮和碳或硼中的至少一种的纳米粒子然后可以退火以形成包括Fe16N2，Fe16（NB）2，Fe16（NC）2或Fe16（NCB）中的至少一种的至少一个相域， 2。

公开(公告)号：EP1764806B1

公开(公告)日：2016-11-09

申请号：EP06018792.9

申请日：2006-09-07

申请人： DOWA Electronics Materials Co., Ltd.

发明人： Shoji, Yoshiyuki ,  Ueyama, Toshihiko

IPC分类号： H01F1/06

CPC分类号： H01F1/09 ,  G11B5/70621 ,  G11B5/70647 ,  G11B5/70657 ,  G11B5/70663 ,  G11B5/70689 ,  G11B5/714 ,  H01F1/065 ,  Y10T428/2982 ,  Y10T428/32

公开(公告)号：EP2791055A4

公开(公告)日：2015-06-03

申请号：EP12857214

申请日：2012-12-17

申请人： UNIV CASE WESTERN RESERVE

发明人： MATTHIESEN DAVID

IPC分类号： C01B21/06 ,  B22F1/00 ,  C22C29/16

CPC分类号： H01F1/24 ,  B22F1/02 ,  B22F9/082 ,  C01B21/0622 ,  C01P2002/54 ,  C01P2006/42 ,  C04B35/58042 ,  C04B35/62615 ,  C04B35/6265 ,  C04B35/6268 ,  C04B2235/405 ,  C04B2235/46 ,  C04B2235/465 ,  C22C33/0264 ,  C23C8/62 ,  H01F1/065 ,  H01F1/083 ,  H01F41/0266

摘要： A process for producing an ordered martensitic iron nitride powder that is suitable for use as a permanent magnetic material is provided. The process includes fabricating an iron alloy powder having a desired composition and uniformity; nitriding the iron alloy powder by contacting the material with a nitrogen source in a fluidized bed reactor to produce a nitride iron powder; transforming the nitride iron powder to a disordered martensitic phase; annealing the disordered martensitic phase to an ordered martensitic phase; and separating the ordered martensitic phase from the iron nitride powder to yield an ordered martensitic iron nitride powder.

公开(公告)号：EP2475483A4

公开(公告)日：2014-04-30

申请号：EP10816183

申请日：2010-09-10

申请人： UNIV NORTHEASTERN

发明人： HARRIS VINCENT G

IPC分类号： B22F9/14 ,  B22F1/02 ,  B22F9/16

CPC分类号： H01F1/11 ,  B22F1/0018 ,  B22F9/24 ,  C01B32/914 ,  C01P2004/10 ,  C22C32/0052 ,  C22C2202/02 ,  H01F1/065 ,  H01F1/09 ,  Y10S977/838

公开(公告)号：EP2704159A1

公开(公告)日：2014-03-05

申请号：EP12776047.8

申请日：2012-04-26

申请人： Toda Kogyo Corporation ,  Tohoku University

发明人： TAKAHASHI, Migaku ,  OGAWA, Tomoyuki ,  OGATA, Yasunobu ,  KOBAYASHI, Naoya ,  POLWATTA GALLAGE, Chammika Ruwan ,  KOHARA, Kaori

IPC分类号： H01F1/11 ,  C01B21/06 ,  H01F1/24 ,  H01F41/02

CPC分类号： H01F1/01 ,  B22F9/22 ,  C01B21/0622 ,  C01P2004/51 ,  C01P2004/54 ,  C01P2006/12 ,  C01P2006/42 ,  C22C38/001 ,  C22C2202/02 ,  H01F1/065 ,  H01F1/083 ,  H01F41/0266

摘要： The present invention relates to ferromagnetic particles capable of exhibiting a high purity and excellent magnetic properties from the industrial viewpoints and a process for producing the ferromagnetic particles, and also provides an anisotropic magnet, a bonded magnet and a compacted magnet which are obtained by using the ferromagnetic particles. The ferromagnetic particles comprising an Fe 16 N 2 compound phase in an amount of not less than 80% as measured by Mössbauer spectrum and each having an outer shell in which FeO is present in the form of a layer having a thickness of not more than 5 nm according to the present invention can be produced by subjecting aggregated particles of an iron compound as a starting material whose primary particles have a ratio of [(average deviation of major axis lengths of particles)/(average major axis length of particles)] of not more than 50%, U c of not more than 1.55, C g of not less than 0.95, C g 2 of not less than 0.40, an average major axis length of 40 to 5000 nm, and an aspect ratio (major axis diameter/minor axis diameter) of 1 to 200, to dispersing treatment; then subjecting the iron compound particles passed through a mesh screen to reducing treatment at a temperature of 160 to 420°C; and subjecting the resulting particles to nitridation treatment at a temperature of 130 to 170°C.

摘要翻译： 本发明涉及一种铁磁性粒子能够显示出在工业上具有高纯度和优异的磁特性及其制造铁磁颗粒的方法，并由此提供关于各向异性磁体，粘结磁体和通过使用获得的压粉磁铁 铁磁性颗粒。 在不小于80％，如通过穆斯堡尔谱量中的铁磁颗粒的Fe 16包含N 2化合物相和每一个都具有在outershell其中的FeO存在于具有厚度的不超过5的层的形式 纳米雅丁到本发明可以通过使铁化合物的凝聚粒子作为原料的一次颗粒具有的比[（颗粒的长轴长度的平均偏差）/（粒子的平均长轴长度）]来生产 不超过50％，不超过1.55 C g还的不小于0.95ü℃，不小于0.40 C g还2（上为40至5000纳米的平均长轴长度，和纵横比长轴直径的 的1〜200 /短轴直径），以分散处理; 然后进行在160〜420℃的温度下还原处理通过网筛的铁化合物颗粒; 和使所得到的颗粒以氮化处理在130℃至170℃

公开(公告)号：EP2555194A1

公开(公告)日：2013-02-06

申请号：EP11765814.6

申请日：2011-03-31

申请人： DOWA Electronics Materials Co., Ltd.

发明人： Omoto Hirohisa ,  KIKUCHI Takayuki ,  UEYAMA Toshihiko

IPC分类号： G11B5/842 ,  B22F1/00 ,  B22F1/02 ,  G11B5/712 ,  H01F1/06

CPC分类号： G11B5/712 ,  B22F1/02 ,  C22C2202/02 ,  H01F1/065

摘要： To provide a metal magnetic powder composed of metal magnetic particles having reduced particle volume, in which affinity with an organic material such as resin is improved when being mixed into such an organic material, and dispersibility of the metal magnetic particle into the organic material such as resin is improved, and a method for producing the same, and a coating and a magnetic recording medium using the metal magnetic powder, wherein the method is provided for producing a metal magnetic powder having a metal magnetic phase mainly composed of ferromagnectic elements, and composed of particles containing one or more kinds of elements selected from rare earth elements including Y, and Al, Si as non-magnetic components, comprising the step of: eluting the non-magnetic components in the particles under an action of a reducing agent acting on the metal magnetic powder, in a solution containing a complexing agent capable of forming the non-magnetic components and a complex; and forming an oxide layer on the particles in the solution after eluting the non-magnetic components into the solution, without drying the particles.

摘要翻译： 以提供具有减小的颗粒体积，其中亲和与有机材料的金属磁性颗粒组成的金属磁性粉末：诸如树脂提高当混入到搜索有机材料制成，并且金属磁性颗粒到有机材料的分散性：如 树脂得到改善，并且使用该金属磁性粉末，worin提供了一种用于生产具有一个主要由ferromagnectic元件的金属磁性相的金属磁性粉末的制造方法相同的方法，以及涂层和磁性记录介质，并且由 的作用在还原剂的作用下洗脱颗粒中的非磁性成分：含有选自稀土类元素包括Y，和Al，Si作为非磁性成分选择的元素的一种或多种，​​包括以下步骤颗粒的 在包含能够形成非磁性成分和复合物的络合剂的溶液中的金属磁性粉末; 以及在所述颗粒在溶液中的非磁性成分溶出至溶液中之后氧化物层，而无需干燥该颗粒。

公开(公告)号：EP2196991A1

公开(公告)日：2010-06-16

申请号：EP09172288.4

申请日：2009-10-06

申请人： Korea Advanced Institute of Science and Technology

发明人： Shin, Sung Chul ,  Jung, Hee-Tae ,  Ko, Hyun-Seok ,  Jung, Jin-Mi

IPC分类号： G11B5/855 ,  H01F1/06

CPC分类号： G11B5/855 ,  B82Y25/00 ,  H01F1/009 ,  H01F1/065 ,  H01F1/068 ,  H01F41/18 ,  Y10T428/24612

摘要： This invention relates to a L1 0 -ordered FePt nanodot array which is manufactured using capillary force lithography, to a method of manufacturing the L1 0 -ordered FePt nanodot array and to a high density magnetic recording medium using the L1 0 -ordered FePt nanodot array. This method includes depositing a FePt thin film on a MgO substrate, forming a thin film made of a polymer material on the deposited FePt thin film using spin coating, bringing a mold into contact with the spin coated FePt thin film, annealing the mold and a polymer pattern which are in contact with each other, cooling and separating the mold and the polymer pattern which are annealed, controlling a size of the polymer pattern through reactive ion etching, ion milling a portion of the FePt thin film uncovered with the polymer pattern thus forming a FePt nanodot array and then removing a remaining polymer layer, and annealing the FePt nanodot array.

摘要翻译： 本发明涉及使用毛细管力平版印刷法制造的L1-0级FePt纳米点阵列，涉及一种制造L1-0级FePt纳米点阵列的方法，以及使用L10级FePt纳米点阵列的高密度磁记录介质 。 该方法包括在MgO基板上沉积FePt薄膜，使用旋涂在沉积的FePt薄膜上形成由聚合物材料制成的薄膜，使模具与旋涂FePt薄膜接触，退火模具和 聚合物图案彼此接触，冷却和分离退火的模具和聚合物图案，通过反应离子蚀刻控制聚合物图案的尺寸，离子研磨由聚合物图案未覆盖的一部分FePt薄膜，因此 形成FePt纳米点阵列，然后除去剩余的聚合物层，并退火FePt纳米点阵列。

公开(公告)号：EP1635334A3

公开(公告)日：2006-06-07

申请号：EP05019428.1

申请日：2005-09-07

申请人： FUJI PHOTO FILM CO., LTD.

发明人： Hattori, Yasushi, c/o Fuji Photo Film Co., Ltd.

IPC分类号： G11B5/706 ,  G11B5/702 ,  H01F1/047 ,  H01F1/06 ,  G11B5/70 ,  G11B5/842

CPC分类号： G11B5/842 ,  B82Y25/00 ,  G11B5/70 ,  G11B5/702 ,  G11B5/716 ,  G11B5/72 ,  H01F1/065 ,  H01F10/007 ,  H01F10/123 ,  H01F10/265 ,  H01F41/16

摘要： A magnetic recording medium in which a magnetic layer is formed on a support, wherein the magnetic layer contains a CuAu-type consisting of FeNi, FePd, FePt, CoPt or CoAu or Cu 3 Au-type consising of Ni 3 Fe, FePd 3 , FePt 3 , CoPt 3 , Ni 3 Pt, CrPt 3 , Ni 3 Mn or Co 3 Pt ferromagnetic ordered alloy, and a value (Mr·t ave (G·µm)) obtained by multiplying the residual magnetic flux density (Mr (G)) with an average thickness (t ave (µm)) of the magnetic layer is 30 or more, and a method of manufacturing the magnetic recording medium, wherein a coating and drying treatment of coating a coating solution for forming a magnetic layer containing a CuAu-type or Cu 3 Au-type ferromagnetic ordered alloy and a binder on a support and of applying a drying treatment is conducted at least twice.

摘要翻译： 一种磁记录介质，其中磁性层形成在载体上，其中磁性层包含由FeNi，FePd，FePt，CoPt或CoAu组成的CuAu型或由Ni3Fe，FePd3，FePt3，CoPt3，Ni3Pt组成的Cu3Au型 ，CrPt3，Ni3Mn或Co3Pt铁磁有序合金，以及通过将剩余磁通密度（Mr（G））乘以磁性材料的平均厚度（tave（μm））而获得的值（Mr·tave（G·μm） 以及该磁记录介质的制造方法，其中，在支持体上涂布用于形成含有CuAu型或Cu3Au型铁磁有序合金和粘合剂的磁性层的涂布液的涂布和干燥处理 并且施加干燥处理至少进行两次。

公开(公告)号：EP1577907A2

公开(公告)日：2005-09-21

申请号：EP05003602.9

申请日：2005-02-18

申请人： Dowa Mining Co., Ltd.

发明人： Masada, Kenji ,  Amino, Takafumi ,  Nagatomi, Akira

IPC分类号： H01F1/20 ,  C01B21/06

CPC分类号： H01F1/065 ,  G11B5/70626 ,  Y10T428/12181 ,  Y10T428/2982

摘要： An iron nitride magnetic powder consisting primarily of Fe 16 N 2 phase whose average particle diameter determined by particle size measurement using a TEM micrograph is 20 nm or less and whose geometric standard deviation of the particle diameter is 1.4 or less. The iron nitride magnetic powder can be obtained by a method of producing an iron nitride magnetic powder consisting primarily of Fe 16 N 2 phase includes a step of, at the time of producing an iron nitride magnetic powder consisting primarily of Fe 16 N 2 phase by subjecting a reduced powder obtained by reduction of iron oxide to ammonia treatment, using goethite containing Al in solid solution as the iron oxide.

摘要翻译： 主要由Fe 16 N 2相组成的氮化铁磁粉，其平均粒径通过TEM显微照片测定，其粒径为20nm以下，粒径的几何标准偏差为1.4以下。 氮化铁磁性粉末可以通过生产主要由Fe 16 N 2相组成的氮化铁磁粉的方法获得，包括以下步骤：在制备主要由Fe 16 N 2相组成的氮化铁磁粉末时， 将通过还原氧化铁获得的还原粉末进行氨处理，使用含有固体溶液中的Al的含铁铁矿作为氧化铁。