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51. 发明专利

JPS5760535A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：JPS5760535A
公开(公告)日：1982-04-12
申请号：JP13613380
申请日：1980-09-30
申请人： Fuji Photo Film Co Ltd
发明人： MATSUFUJI AKIHIRO , ISHIGURO TADASHI , TSUJI NOBUO
IPC分类号： G11B5/708 , C09D5/23 , C09D7/12 , G11B5/702 , G11B5/712
CPC分类号： G11B5/7028 , G11B5/712 , Y10S428/90
摘要： PURPOSE: To obtain an excellent magnetic recording medium by preventing the aging deterioration of magnetic characteristics of ferromagnetic powder, through a specified organic Al compound included in a magnetic substance layer.
CONSTITUTION: Afer ferromagnetic pwder (γ-Fe
2 O
3 , magnetic alloy powder etc.) is immersed in a liquid of organic aluminum compound expressed by the formulasI, II (where: R, R
1 are alkyl or C
1W10 , R
2 is C
1W20 alkenyl) dissolved in a solvent such as toluene, and dried. The dried magnetic pwder including the organic Al compound is mixed in the solvent together wit coupling agent and dispersing agent and the like to prepare a magnetic coating liquid. The coating liquid is applied to a substrate such as polyethylene terephthalate for magnetic field orientation, and after drying and calender processing, a magnetic tape is obtained by slitting into a specified width. Thus, chemically stable and excellent magnetic recording medium can be obtained.
COPYRIGHT: (C)1982,JPO&Japio
摘要翻译：目的：通过防止铁磁性粉末的磁特性的老化劣化，通过包含在磁性物质层中的规定的有机Al化合物来获得优良的磁记录介质。构成：将铁磁性粉末（γ-Fe 2 O 3，磁性合金粉末等）浸渍在由式I，II表示的有机铝化合物的液体中（其中：R，R 1为烷基或C 1-10，R 2为C 1-20烯基）溶解在溶剂如甲苯中，并干燥。将包含有机Al化合物的干燥磁粉在溶剂中与偶联剂和分散剂等混合以制备磁性涂布液。将涂布液施加到诸如聚对苯二甲酸乙二醇酯的基材上用于磁场取向，并且在干燥和压延处理之后，通过切割成特定的宽度获得磁带。因此，可以获得化学稳定且优异的磁记录介质。

52. 发明专利

JP2018137018A 磁気テープ审中-公开
公开(公告)号：JP2018137018A
公开(公告)日：2018-08-30
申请号：JP2017029508
申请日：2017-02-20
申请人：富士フイルム株式会社
发明人：笠田成人
IPC分类号： G11B5/70 , G11B5/78 , G11B5/738 , G11B5/706 , G11B5/708
CPC分类号： G11B5/712 , G11B5/00813 , G11B5/70 , G11B5/70615 , G11B5/70678 , G11B5/7085 , G11B5/78
摘要：【課題】非磁性層と磁性層との合計厚みが0.60μm以下の磁気テープであって、低温高湿環境において走行を繰り返しても電磁変換特性の低下が少ない磁気テープの提供。【解決手段】非磁性支持体上に非磁性粉末および結合剤を含む非磁性層を有し、非磁性層上に強磁性粉末および結合剤を含む磁性層を有する磁気テープであって、上記非磁性層と上記磁性層との合計厚みは0.60μm以下であり、上記磁性層は研磨剤を含み、走査型電子顕微鏡を用いて行われる平面観察によって上記磁性層の表面の4.3μm×6.3μm角の領域で確認される上記研磨剤の平面視最大面積の上記領域の総面積に対する割合は0.02%以上0.06%未満であり、かつ上記磁性層の表面において振り子粘弾性試験により求められる対数減衰率は0.050以下である磁気テープ。【選択図】なし

53. 发明专利

JP2016169148A 表面改質鉄系酸化物磁性粒子粉およびその製造方法有权
标题翻译：表面改性富氧氧化物颗粒粉及其制造方法
公开(公告)号：JP2016169148A
公开(公告)日：2016-09-23
申请号：JP2016049015
申请日：2016-03-11
申请人： DOWAエレクトロニクス株式会社
发明人：坂根堅之 , 川人哲也
IPC分类号： H01F1/11 , C01G49/00
CPC分类号： C01G49/00 , C01G51/00 , G11B5/706 , G11B5/712 , G11B5/714 , G11B5/84 , H01F1/11
摘要：【課題】製造プロセス中での固液分離性が良好で、塗布型磁気記録媒体を形成するための塗料中での分散性が良好、かつ、配向性も良好で、さらに水溶性アルカリ金属の溶出量が少ない表面改質鉄系酸化物磁性粒子粉およびその表面改質鉄系酸化物磁性粒子粉の製造方法を提供する。【解決手段】3価の鉄イオンもしくは3価の鉄イオンとFeサイトを一部置換する金属のイオンを溶解した溶液をアルカリ水溶液で中和して生成した前駆体にシリコン酸化物を被覆し、それを加熱して得られたεタイプの鉄系酸化物磁性粉に、AlイオンおよびYイオンの一種または二種の水酸化物もしくは含水酸化物を被着させることにより、製造プロセス中での固液分離性が良好で、塗料中での分散性の良好、かつ水溶性アルカリ金属の溶出量が少ない表面改質鉄系酸化物磁性粒子粉が得られる。【選択図】なし
摘要翻译：要解决的问题：为了提供在制造方法中具有令人满意的固液分离性的表面改性的氧化亚铁磁性粉末，在用于形成涂布型磁记录介质的涂料中的分散性良好，取向性能也令人满意，进一步降低水溶性碱金属的洗脱量，以及表面改性二氧化锰磁性体粉末的制造方法。溶液：通过将三价铁离子或三价铁离子和金属离子溶解得到的溶液中和，生成前体其中Fe部位被碱性水溶液部分取代。然后用硅氧烷氧化物涂覆前体，并加热得到ε型氧化亚铁磁性粉末。在其上沉积一种或两种Al离子和Y离子或含水氧化物的氢氧化物，以获得在制备方法中在固液分离性方面令人满意的表面改性的氧化亚铁磁性颗粒粉末，其在涂料中的分散性良好，水溶性碱金属的洗脱量。选择图：无

54. 发明专利

JP2013153152A Magnetic particle and method for manufacturing the same, and use thereof 有权
标题翻译：磁性颗粒及其制造方法及其用途
公开(公告)号：JP2013153152A
公开(公告)日：2013-08-08
申请号：JP2012282687
申请日：2012-12-26
申请人： Fujifilm Corp , 富士フイルム株式会社
发明人： KOMURA KAZUFUMI , MORI YOSHIHIKO
IPC分类号： H01F1/11 , G11B5/712
CPC分类号： G11B5/70626 , G11B5/64 , G11B5/65 , G11B5/712 , H01F1/11
摘要： PROBLEM TO BE SOLVED: To provide means for readily forming a magnetic layer with magnetic particles highly distributed therein.SOLUTION: The method for manufacturing magnetic particles modified in surface property comprises the steps of: adding, to an aqueous magnetic liquid having an acid aqueous solvent and magnetic particles distributed therein, a carboxylic acid-based compound selected from a group consisting of an aromatic compound and an aliphatic compound, each having a carboxylic acid (salt)base expressed by the following formula [in which M represents a hydrogen atom or an alkali metal atom], with proviso that if the carboxylic acid-based compound includes one carboxylic acid (salt)base in a molecule, a part of the molecule except the carboxylic acid (salt)base has 1 or more and 13 or less carbon atoms; and then collecting the resultant magnetic particles from the aqueous magnetic liquid. Thus, the magnetic particles modified in surface property by deposition of the compound are obtained.
摘要翻译：要解决的问题：提供用于容易地形成具有高度分布在其中的磁性颗粒的磁性层的装置。解决方案：用于制造表面性质改性的磁性颗粒的方法包括以下步骤：向具有酸性水溶剂的含水磁性液体和分散在其中的磁性颗粒，选自芳香族化合物和脂肪族化合物的羧酸系化合物，各自具有由下式表示的羧酸（盐）碱[其中M表示氢原子或碱金属原子]，条件是如果羧酸基化合物在分子中包含一个羧酸（盐）碱，则除了羧酸（盐）碱以外的一部分分子具有1以上且13以下的碳原子 ; 然后从水性磁性液体中收集所得到的磁性颗粒。因此，获得通过沉积化合物而在表面性质上改性的磁性颗粒。

55. 发明专利

JP5219715B2 Magnetic powder for surface modifier, magnetic paint, as well as magnetic recording media including it 有权
公开(公告)号：JP5219715B2
公开(公告)日：2013-06-26
申请号：JP2008248343
申请日：2008-09-26
申请人：富士フイルム株式会社
发明人：和史小村 , 巧鶴岡 , 忠宏大石
IPC分类号： G11B5/712 , G11B5/702 , G11B5/706 , G11B5/708 , G11B5/738
CPC分类号： G11B5/738 , B22F1/0062 , B82Y25/00 , C08K3/08 , C08K9/04 , C09D7/62 , G11B5/702 , G11B5/712 , H01F1/0054 , H01F1/15333
摘要： An aspect of the present invention relates to a method of modifying a surface of a powder, comprising mixing a powder with a heterocyclic compound comprising at least one hydroxylic group and/or carboxylic group. The present invention further relates to a magnetic recording medium and a coating material.

56. 发明专利

JP2013101742A FePt-C BASED MAGNETIC RECORDING MEDIUM WITH ONION-LIKE CARBON PROTECTION LAYER 审中-公开
标题翻译：基于FePt-C的磁性记录介质，具有类似保护层的保护层
公开(公告)号：JP2013101742A
公开(公告)日：2013-05-23
申请号：JP2012244046
申请日：2012-11-06
申请人： Hgst Netherlands B V , エイチジーエスティーネザーランドビーブイ
发明人： OLEKSANDR MOSENDZ , PISANA SIMONE , FRANK D R DITT ROSE , WELLER DIETER K
IPC分类号： G11B5/72 , G11B5/65
CPC分类号： G11B5/72 , G11B5/65 , G11B5/712
摘要： PROBLEM TO BE SOLVED: To provide a FePt-C based magnetic recording medium having an onion-like carbon protection layer.SOLUTION: The magnetic medium for magnetic data recording includes a plurality of magnetic grains protected by thin layers of graphitic carbon. The layers of graphitic carbon are formed in a manner similar to onion skins and can be constructed as single monatomic layers of carbon. The thin layers of graphitic carbon can be formed as layers of graphene or fullerenes that either cover or partially encapsulate the magnetic grains. The layers of graphitic carbon provide excellent protection against corrosion and wear, and greatly reduce magnetic spacing for improved magnetic performance.
摘要翻译：要解决的问题：提供具有洋葱状碳保护层的FePt-C基磁记录介质。解决方案：用于磁数据记录的磁介质包括被薄层石墨碳保护的多个磁性颗粒。石墨碳层以与洋葱皮相似的方式形成，并且可以构造为单一单原子层的碳。石墨碳的薄层可以形成为覆盖或部分地包封磁性颗粒的石墨烯层或富勒烯层。石墨碳层提供优异的防腐蚀和磨损保护，并大大减少磁间隔，以改善磁性能。版权所有（C）2013，JPO＆INPIT

57. 发明专利

JP5172541B2 Powder surface modifier as well as the magnetic paint and the non-magnetic paint containing it, a magnetic recording medium and a method of manufacturing the same 有权
公开(公告)号：JP5172541B2
公开(公告)日：2013-03-27
申请号：JP2008219687
申请日：2008-08-28
申请人：富士フイルム株式会社
发明人：和史小村
IPC分类号： G11B5/712 , B01F17/00 , B01F17/42 , C09D5/23 , C09D7/12 , C09D201/00
CPC分类号： C09D7/1233 , C08K3/22 , C08K9/04 , C09D7/62 , C09D7/63 , G11B5/712 , G11B5/738 , H01F1/113
摘要： An aspect of the present invention relates to a method of modifying a surface of a powder, comprising mixing a powder with a compound denoted by general formula (I): wherein, in general formula (I), each of R10 and R13 independently denotes a hydrogen atom, alkyl group, or aryl group, each of R11 and R12 independently denotes an alkyl group or an aryl group, and L denotes a single bond or an oxygen atom.

58. 发明专利

JP2012164410A Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：JP2012164410A
公开(公告)日：2012-08-30
申请号：JP2011239571
申请日：2011-10-31
申请人： Fujifilm Corp , 富士フイルム株式会社
发明人： HATTORI KOJI , SUZUKI RYOTA , KASADA NARUTO
IPC分类号： G11B5/712 , G11B5/706 , G11B5/708
CPC分类号： G11B5/712 , G11B5/7085
摘要： PROBLEM TO BE SOLVED: To provide a coating-type magnetic recording medium that contains magnetic particles having high thermal stability in a magnetic layer and is excellent in recording performance.SOLUTION: A magnetic recording medium has a magnetic layer containing a ferromagnetic powder and a binder on a nonmagnetic support. The ferromagnetic powder is composed of magnetic particles with a soft magnetic material adhered thereto under the condition that the soft magnetic material is exchange-coupled to hard magnetic particles on the surfaces of the hard magnetic particles.
摘要翻译：要解决的问题：提供一种包含在磁性层中具有高热稳定性的磁性颗粒并且记录性能优异的涂层型磁记录介质。解决方案：磁记录介质具有在非磁性载体上含有铁磁性粉末和粘合剂的磁性层。在软磁性材料与硬磁性粒子表面上的硬磁性粒子交换耦合的条件下，铁磁性粉末由粘附有软磁性材料的磁性粒子构成。版权所有（C）2012，JPO＆INPIT

59. 发明专利

JP4791513B2 Iron nitride-based magnetic powder, and a magnetic recording medium using the same 有权
公开(公告)号：JP4791513B2
公开(公告)日：2011-10-12
申请号：JP2008202238
申请日：2008-08-05
申请人：日立マクセル株式会社
发明人：鉄太郎井上 , 勇治佐々木
IPC分类号： H01F1/06 , G11B5/706
CPC分类号： G11B5/70626 , G11B5/712 , G11B5/714 , H01F1/065 , Y10T428/1121 , Y10T428/115
摘要： A spherical or ellipsoidal iron nitride magnetic powder having a core comprising iron nitride including a Fe16N2 phase as a primary phase and an outer layer containing yttrium (Y) and aluminum (Al), in which an average particle size r of the iron nitride magnetic powder is 20 nm or less, an average diameter d of the core is 4 to 10 nm, and a ratio of r to d (r/d) is 2 to 3, and average content of yttrium and aluminum in the outer layer are from 0.9 to 5 atomic % and from 30 to 50 atomic %, respectively, each based on the total number of iron atoms in the iron nitride magnetic powder, and standard deviations of the contents of yttrium and aluminum are 0.6 atomic % or less and 17 atomic % or less, respectively.

60. 发明专利

JP2009134831A Magnetic recording medium and manufacturing method thereof 审中-公开
标题翻译：磁记录介质及其制造方法
公开(公告)号：JP2009134831A
公开(公告)日：2009-06-18
申请号：JP2007311365
申请日：2007-11-30
申请人： Tdk Corp , Tdk株式会社
发明人： JINGU NOBUHIRO , SATO MAMORU , KITAMURA KENICHI , YOSHIMURA MEGUMI
IPC分类号： G11B5/706 , B22F1/02 , B22F9/24 , G11B5/702 , G11B5/712 , G11B5/714 , G11B5/78 , G11B5/842 , H01F1/053 , H01F1/06
CPC分类号： G11B5/70621 , G11B5/712
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium that can obtain high recording density and has a magnetic layer that cannot be electrified easily. SOLUTION: The magnetic recording medium has a magnetic layer containing a SmCo-based magnetic fine particle 12 and a hydrophilic binder, wherein the SmCo magnetic fine particle 12 has a core 14 made of a SmCo-based nano particle and a coating layer 16 made of a hydrophilic polymer and coating at least a part of a surface of the core 14. The molecular weight of the hydrophilic binder is larger than that of the hydrophilic polymer for coating the core 14 made of the SmCo-based nano particle. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供可以获得高记录密度并且具有不容易带电的磁性层的磁记录介质。解决方案：磁记录介质具有含有SmCo基磁性细颗粒12和亲水性粘合剂的磁性层，其中SmCo磁性微粒12具有由SmCo基纳米颗粒制成的芯14和涂层 16，其由亲水性聚合物制成并且涂覆至芯部14的表面的至少一部分。亲水性粘合剂的分子量大于用于涂覆由SmCo基纳米颗粒制成的芯14的亲水性聚合物的分子量。版权所有（C）2009，JPO＆INPIT

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