专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20180358046A1 MAGNETIC RECORDING MEDIUM 审中-公开
公开(公告)号：US20180358046A1
公开(公告)日：2018-12-13
申请号：US15996622
申请日：2018-06-04
申请人： FUJIFILM Corporation
发明人： Masashi SHIRATA , Takashi FUJIMOTO
IPC分类号： G11B5/78 , G11B5/706
CPC分类号： G11B5/78 , G11B5/70621
摘要： Provided is a magnetic recording medium including: a non-magnetic support; and a magnetic layer including particles of at least one kind of epsilon type iron oxide-based compound selected from the group consisting of ε-Fe2O3 and a compound represented by Formula (1), an abrasive, and a binding agent, at least on one surface of the non-magnetic support, in which an average equivalent circle diameter of the particles of the epsilon type iron oxide-based compound is 7 nm to 18 nm, an average equivalent circle diameter of the abrasive in a plan view of the magnetic layer is 20 nm to 1,000 nm, and a coefficient of variation of the equivalent circle diameter of the abrasive is 30% to 60%. In Formula (1), A represents at least one kind of metal element other than Fe and a satisfies a relationship of 0

2. 发明申请

US20180033528A1 SURFACE-MODIFIED IRON-BASED OXIDE MAGNETIC PARTICLE POWDER, AND METHOD FOR PRODUCING SAME 审中-公开
公开(公告)号：US20180033528A1
公开(公告)日：2018-02-01
申请号：US15552283
申请日：2016-03-11
申请人： DOWA ELECTRONICS MATERIALS CO., LTD.
发明人： Kenji SAKANE , Tetsuya KAWAHITO
IPC分类号： H01F1/147 , C01F7/34 , C01F17/00 , C01G51/00
CPC分类号： H01F1/14733 , C01F7/34 , C01F17/0025 , C01F17/0043 , C01G49/06 , C01G51/40 , C01P2002/52 , C01P2004/64 , C01P2004/84 , C01P2006/11 , C01P2006/12 , C01P2006/42 , G11B5/70615 , G11B5/70621 , G11B5/70642 , G11B5/712 , G11B5/714 , G11B5/84 , H01F1/11
摘要： A surface-modified iron-based oxide magnetic particle powder has good solid-liquid separation property in the production process, has good dispersibility in a coating material for forming a coating-type magnetic recording medium, has good orientation property, and has a small elution amount of a water-soluble alkali metal, and to provide a method for producing the surface-modified iron-based oxide magnetic particle powder. The surface-modified iron-based oxide magnetic particle powder can be obtained by neutralizing a solution containing dissolved therein a trivalent iron ion and an ion of the metal, by which the part of Fe sites is to be substituted, with an alkali aqueous solution, so as to provide a precursor, coating a silicon oxide on the precursor, heating the precursor to provide e-type iron-based oxide magnetic powder, and adhering a hydroxide or a hydrous oxide of one kind or two kinds of Al and Y thereto.

3. 发明申请

US20080107921A1 MAGNETIC TAPE AND MAGNETIC TAPE CARTRIDGE 审中-公开
标题翻译：磁带和磁带盒
公开(公告)号：US20080107921A1
公开(公告)日：2008-05-08
申请号：US11766491
申请日：2007-06-21
申请人： Sadamu Kuse , Tsugihiro Doi , Tetsutaro Inoue , Mikio Kishimoto , Yuji Sasaki , Hideaki Watanabe
发明人： Sadamu Kuse , Tsugihiro Doi , Tetsutaro Inoue , Mikio Kishimoto , Yuji Sasaki , Hideaki Watanabe
IPC分类号： G11B5/39 , G11B5/62
CPC分类号： B82Y25/00 , G11B5/584 , G11B5/70 , G11B5/70615 , G11B5/70621 , G11B5/712 , G11B5/714 , G11B5/716 , G11B5/73 , G11B5/735 , G11B5/78 , G11B23/107 , H01F1/0054 , H01F1/0551 , H01F1/059 , Y10T428/1107 , Y10T428/2991
摘要： A magnetic recording medium comprising a non-magnetic support; at least one lower magnetic layer containing magnetic powder and a binder resin, which is formed on one side of the non-magnetic support with or without a non-magnetic primer layer interposed between the non-magnetic support and the lower magnetic layer; at least one non-magnetic intermediate layer containing non-magnetic powder and a binder resin, which is formed on the lower magnetic layer; at least one upper magnetic layer containing magnetic powder and a binder resin, which is formed on the non-magnetic intermediate layer; and a back layer which is formed on the other side of the non-magnetic support, characterized in that the magnetic powder contained in the uppermost magnetic layer of the upper magnetic layer is iron type magnetic powder which comprises substantially spherical or ellipsoidal particles with a number-average particle diameter of 5 to 50 nm and an average axial ratio of 1 to 2, each of said particles containing iron or containing iron as a main component and a transition element; and that the total thickness of the magnetic recording medium is 6 μm or less. This magnetic recording medium has electromagnetic conversion, characteristics which cannot be achieved by any of conventional magnetic recording media, and also is expected to have excellent magnetic serve characteristics.
摘要翻译：一种磁记录介质，包括非磁性载体; 至少一个含有磁性粉末和粘合剂树脂的下磁性层，其形成在非磁性载体的一侧上，该非磁性载体具有或不具有介于非磁性载体和下部磁性层之间的非磁性底漆层; 至少一个含有非磁性粉末和粘结剂树脂的非磁性中间层，形成在下部磁性层上; 至少一个含有磁性粉末和粘结剂树脂的上磁性层，形成在非磁性中间层上; 以及形成在所述非磁性载体的另一侧的背层，其特征在于，包含在所述上磁性层的最上层磁性层中的磁性粉末是铁型磁粉，其包含基本上具有数量的球形或椭圆形颗粒平均粒径为5〜50nm，平均轴比为1〜2，所述粒子含有铁或以铁为主要成分，过渡元素为主成分。并且磁记录介质的总厚度为6μm或更小。这种磁记录介质具有电磁转换特性，这些特性通过任何常规的磁记录介质都不能实现，并且预期具有优异的磁性能特性。

4. 发明授权

US07291409B2 Magnetic recording medium using magnetic powder having a core portion and an outer layer portion including a rare earth element and magnetic recording cassette 有权
标题翻译：使用具有芯部的磁性粉末和包括稀土元素和磁记录盒的外层部分的磁记录介质
公开(公告)号：US07291409B2
公开(公告)日：2007-11-06
申请号：US10369606
申请日：2003-02-21
申请人： Sadamu Kuse , Tsugihiro Doi , Tetsutaro Inoue , Mikio Kishimoto , Yuji Sasaki , Hideaki Watanabe
发明人： Sadamu Kuse , Tsugihiro Doi , Tetsutaro Inoue , Mikio Kishimoto , Yuji Sasaki , Hideaki Watanabe
IPC分类号： G11B5/706 , G11B5/712 , G11B5/714
CPC分类号： B82Y25/00 , G11B5/584 , G11B5/70 , G11B5/70615 , G11B5/70621 , G11B5/712 , G11B5/714 , G11B5/716 , G11B5/735 , G11B5/738 , G11B5/78 , G11B23/107 , H01F1/0054 , H01F1/0551 , H01F1/059 , Y10T428/1107 , Y10T428/2991
摘要： A magnetic recording medium comprising a non-magnetic support, at least one primer layer formed on one surface of the non-magnetic support, comprising a non-magnetic powder and a binder resin, at least one magnetic layer formed on the primer layer, comprising a magnetic powder and a binder resin, and a back layer formed on the other surface of the non-magnetic support, wherein the magnetic powder contained in the uppermost layer of the magnetic layer is a rare earth metal-iron type magnetic powder of substantially spherical or ellipsoidal particles comprising a rare earth element and iron or a transition metal which comprises iron, and has a number average particle size 5 to 50 nm and an average axis ratio of 1 to 2, and the total thickness of the magnetic recording medium is less than 6 μm. This magnetic recording medium can achieve an excellent block error rate, which cannot be realized with magnetic recording media comprising conventional acicular magnetic powders.
摘要翻译：一种包含非磁性载体的磁记录介质，至少一个形成在所述非磁性载体的一个表面上的底层，包含非磁性粉末和粘合剂树脂，所述至少一个磁性层形成在所述底漆层上，包括磁性粉末和粘合剂树脂，以及形成在非磁性载体的另一个表面上的背层，其中包含在磁性层的最上层中的磁粉是基本上为球形的稀土金属 - 铁型磁性粉末或包含稀土元素和铁的过渡金属的椭圆体颗粒或包含铁的过渡金属，并且具有5至50nm的数均粒径和1至2的平均轴比，并且磁记录介质的总厚度较小超过6个妈妈。该磁记录介质可以实现优异的块错误率，这是由包含传统针状磁粉的磁记录介质所不能实现的。

5. 发明申请

US20060225535A1 Magnetic nanoparticles 审中-公开
标题翻译：磁性纳米颗粒
公开(公告)号：US20060225535A1
公开(公告)日：2006-10-12
申请号：US10558561
申请日：2004-06-03
申请人： David Mainwaring
发明人： David Mainwaring
IPC分类号： H01F1/06
CPC分类号： B82Y30/00 , B22F1/0018 , B22F9/24 , B82Y25/00 , G11B5/70621 , G11B5/714 , H01F1/0045 , H01F2007/068
摘要： Nanoparticle sized metal or alloy is synthesized through a reverse micelle system which includes the steps of a) forming a concentrated aqueous solution of transition metal salts with platinum salts b) dispersing the metal salt solution in a non aqueous solution of a surfactant c) adding a reducing agent to reduce the metal salts to metallic alloy nano-particles in the absence of oxygen d) separating the metallic alloy nanoparticles 1s) heating the metallic alloy nanoparticles under controlled time, atmosphere and temperature conditions sufficient to form particles of a desired size and magnetic characteristics. The, precipitated metal or alloy nanoparticle has an average size of 3 nm and is superparamagnetic. Through controlled annealing treatment, the magnetic characteristics of the nanoparticles can be manipulated to achieve specific values in the final product that is suitable for predetermined applications. The nanoparticles exhibiting superparamagnetism are suitable for magnetic bio-bead applications. Weakly ferromagnetic magnetic alloy nanoparticles are suitable for actuator applications. The strongly ferromagnetic magnetic alloy nanoparticles exhibiting high coercivity can be potential candidate for magnetic data storage applications.
摘要翻译：通过反胶束系统合成纳米尺寸的金属或合金，其包括以下步骤：a）用铂盐形成过渡金属盐的浓缩水溶液b）将金属盐溶液分散在表面活性剂的非水溶液中c）在不存在氧的情况下将金属盐还原成金属合金纳米颗粒d）分离金属合金纳米颗粒1s）在受控时间，大气和温度条件下加热金属合金纳米颗粒，足以形成所需尺寸和磁性的颗粒特点沉淀的金属或合金纳米颗粒具有3nm的平均尺寸并且是超顺磁性的。通过控制退火处理，可以操纵纳米颗粒的磁特性以在适合于预定应用的最终产品中达到特定值。显示出超顺磁性的纳米颗粒适用于磁性生物珠应用。弱磁性磁性合金纳米颗粒适用于执行器应用。表现出高矫顽力的强铁磁性磁性合金纳米颗粒可能是磁数据存储应用的潜在候选者。

6. 发明申请

US20060032330A1 Face-centered cubic structure alloy particles and method of manufacturing same 有权
标题翻译：面心立方结构合金颗粒及其制造方法
公开(公告)号：US20060032330A1
公开(公告)日：2006-02-16
申请号：US11202085
申请日：2005-08-12
申请人： Kimitaka Sato
发明人： Kimitaka Sato
IPC分类号： C22C38/00 , B22F9/24
CPC分类号： H01F1/065 , B22F1/0018 , B22F9/24 , B82Y10/00 , B82Y30/00 , C22C1/0491 , G11B5/656 , G11B5/70615 , G11B5/70621 , H01F1/0054 , H01F1/068 , Y10S977/773
摘要： Alloy particles of an alloy having a face-centered cubic structure comprise at least one selected from Fe and Co and at least one selected from Pt and Pd as principal components. The alloy particles have a TEM-measured average grain size (DTEM) of not more than 50 nm, and a single crystallinity (DTEM)/(DX) that is less than 1.50, where (DX) is X-ray crystallite size. These alloy particles can be advantageously manufactured by using the polyol process to synthesize the alloy particles in the presence of a complexing agent.
摘要翻译：具有面心立方结构的合金的合金粒子包含选自Fe和Co中的至少一种以及选自Pt和Pd中的至少一种作为主要成分。合金颗粒具有不大于50nm的TEM测量的平均晶粒尺寸（D TEM TEM），并且单结晶度（D TEM TEM）/（D＆lt; X

7. 发明授权

US06835450B2 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US06835450B2
公开(公告)日：2004-12-28
申请号：US09826932
申请日：2001-04-06
申请人： Ronald John Veitch , Albert Kohl , Helmut Jakusch , Andreas Ilmer , Peter Heilmann , Ria Kress , Stefan Müller , Johannes Sandrock
发明人： Ronald John Veitch , Albert Kohl , Helmut Jakusch , Andreas Ilmer , Peter Heilmann , Ria Kress , Stefan Müller , Johannes Sandrock
IPC分类号： B32B516
CPC分类号： G11B5/852 , G11B5/70621 , G11B5/70652 , G11B5/70678 , G11B5/708 , Y10T428/265
摘要： Multilayer magnetic recording medium is suitable for high recording densities and the recording of digital data, has very good electromagnetic recording properties in the entire recording wavelength range and good mechanical properties and possesses a flat frequency response and which has at least one upper magnetic recording layer less than 0.5 &mgr;m thick and at least one lower layer which contains a magnetically soft pigment.
摘要翻译：多层磁记录介质适用于高记录密度和数字数据的记录，在整个记录波长范围内具有非常好的电磁记录性能和良好的机械性能，并且具有平坦的频率响应，并且具有至少一个较高的磁记录层超过0.5μm厚，以及至少一个含有软质软质颜料的下层。

8. 发明授权

US06783608B2 Secondary agglomerates of magnetic metal particles for magnetic recording and process for producing the same 失效
标题翻译：用于磁记录的磁性金属颗粒的二次附聚物及其制造方法
公开(公告)号：US06783608B2
公开(公告)日：2004-08-31
申请号：US10128574
申请日：2002-04-24
申请人： Kenji Okinaka , Kohji Mori , Masayuki Uegami
发明人： Kenji Okinaka , Kohji Mori , Masayuki Uegami
IPC分类号： H01F106
CPC分类号： G11B5/70621 , G11B5/714
摘要： Secondary agglomerates of magnetic metal particles for magnetic recording, have a sodium content of not more than 20 ppm and a calcium content of not more than 40 ppm, an average particle diameter of 300 to 800 &mgr;m and an upper limit of particle diameters of 2,000 &mgr;m, and comprise magnetic metal primary particles having an average major axis diameter of 0.05 to 0.25 &mgr;m.
摘要翻译：用于磁记录的磁性金属颗粒的二次附聚物的钠含量不超过20ppm，钙含量不大于40ppm，平均粒径为300-800μm，粒径上限为2000μm 并且包括平均长轴直径为0.05至0.25μm的磁性金属一次粒子。

9. 发明申请

US20040110033A1 Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：US20040110033A1
公开(公告)日：2004-06-10
申请号：US10397519
申请日：2003-03-27
申请人： TDK CORPORATION
发明人： Takayoshi Kuwajima , Osamu Inoue , Akimasa Kaizu
IPC分类号： G11B005/66
CPC分类号： G11B5/70621 , G11B5/70 , G11B5/714 , G11B5/738 , Y10T428/256 , Y10T428/265
摘要： The average major-axis length (L) of a ferromagnetic alloy powder primarily contained together with a binder in a magnetic layer provided on at least one surface of a magnetic support is less than 0.10 nullm, and the ferromagnetic alloy powder contains Co at a content of 15 to 28 at % relative to Fe, and furthermore, contains Y at a content of 22 nullmol/m2 or more with respect to a specific surface area (Sc) calculated from the above-mentioned average major-axis length (L) and the crystallite diameter (d). A coating-type high-recording-density magnetic recording medium has excellent surface properties, an excellent electromagnetic transducing characteristic especially in short wavelength regions and high reliability.
摘要翻译：在磁性载体的至少一个表面上设置的磁性层中主要与粘合剂一起含有的铁磁性合金粉末的平均长轴长度（L）小于0.10μm，铁磁性合金粉末含有Co含量相对于Fe为15〜28at％，另外含有相对于由上述平均长轴长（L）计算的比表面积（Sc）为22μmol/ m 2以上的Y，微晶直径（d）。涂布型高记录密度磁记录介质具有优异的表面性能，特别是在短波长区域和高可靠性下具有优异的电磁感应特性。

10. 发明申请

US20040089564A1 Magnetic tape and magnetic tape cartridge 有权
标题翻译：磁带和磁带盒
公开(公告)号：US20040089564A1
公开(公告)日：2004-05-13
申请号：US10389880
申请日：2003-03-18
发明人： Sadamu Kuse , Tsugihiro Doi , Tetsutaro Inoue , Mikio Kishimoto , Yuji Sasaki , Hideaki Watanabe
IPC分类号： B65D085/30
CPC分类号： B82Y25/00 , G11B5/584 , G11B5/70 , G11B5/70615 , G11B5/70621 , G11B5/712 , G11B5/714 , G11B5/716 , G11B5/735 , G11B5/738 , G11B5/78 , G11B23/107 , H01F1/0054 , H01F1/0551 , H01F1/059 , Y10T428/1107 , Y10T428/2991
摘要： A magnetic recording medium comprising a non-magnetic support; at least one lower magnetic layer containing magnetic powder and a binder resin, which is formed on one side of the non-magnetic support with or without a non-magnetic primer layer interposed between the non-magnetic support and the lower magnetic layer; at least one non-magnetic intermediate layer containing non-magnetic powder and a binder resin, which is formed on the lower magnetic layer; at least one upper magnetic layer containing magnetic powder and a binder resin, which is formed on the non-magnetic intermediate layer; and a back layer which is formed on the other side of the non-magnetic support, characterized in that the magnetic powder contained in the uppermost magnetic layer of the upper magnetic layer is iron type magnetic powder which comprises substantially spherical or ellipsoidal particles with a number-average particle diameter of 5 to 50 nm and an average axial ratio of 1 to 2, each of said particles containing iron or containing iron as a main component and a transition element; and that the total thickness of the magnetic recording medium is 6 nullm or less. This magnetic recording medium has electromagnetic conversion characteristics which cannot be achieved by any of conventional magnetic recording media, and also is expected to have excellent magnetic serve characteristics.
摘要翻译：一种磁记录介质，包括非磁性载体; 至少一个含有磁性粉末和粘合剂树脂的下磁性层，其形成在非磁性载体的一侧上，该非磁性载体具有或不具有介于非磁性载体和下部磁性层之间的非磁性底漆层; 至少一个含有非磁性粉末和粘结剂树脂的非磁性中间层，形成在下部磁性层上; 至少一个含有磁性粉末和粘结剂树脂的上磁性层，形成在非磁性中间层上; 以及形成在所述非磁性载体的另一侧的背层，其特征在于，包含在所述上磁性层的最上层磁性层中的磁性粉末是铁型磁粉，其包含基本上具有数量的球形或椭圆形颗粒平均粒径为5〜50nm，平均轴比为1〜2，所述粒子含有铁或以铁为主要成分，过渡元素为主成分。并且磁记录介质的总厚度为6μm或更小。该磁记录介质具有通过任何常规磁记录介质无法实现的电磁转换特性，并且预期具有优异的磁性能特性。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式