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公开(公告)号：US4141763A
公开(公告)日：1979-02-27
申请号：US784747
申请日：1977-04-05
申请人： Masashi Aonuma , Yasuo Tamai , Tatsuji Kitamoto , Fumio Kodama
发明人： Masashi Aonuma , Yasuo Tamai , Tatsuji Kitamoto , Fumio Kodama
摘要： A process for producing a ferromagnetic powder comprising injecting a stream of an aqueous solution of a metal salt capable of forming a ferromagnetic substance and a stream of solution containing a reducing material for mixing into a reaction chamber such that the two solutions impinge upon one another causing an oxidation-reduction reaction between them to occur, and applying a magnetic field of 50 oe or more to the particles produced by the oxidation-reduction reaction for the period during which the particles become ferromagnetic particles after going through a superparamagnetic state and an apparatus for use in the practice of the above process comprising a reaction vessel, at least one nozzle for injecting each of a solution of a metal salt and a solution containing a reducing material into the reaction vessel and a magnet for producing a magnetic field in the reaction vessel with the nozzles being open to the magnetic field and positioned so that the solution of the metal salt and the solution of the reducing material when injected are mixed.
摘要翻译： 一种制造铁磁粉末的方法，包括将能形成铁磁性物质的金属盐的水溶液流和含有还原材料的溶液流混合到反应室中，使得两种溶液彼此撞击导致 在它们之间发生氧化还原反应，并且在通过超顺磁性状态的颗粒变成铁磁颗粒的时期之后，对由氧化还原反应产生的颗粒施加50ee或更大的磁场， 用于上述方法的实践中，包括反应容器，用于将金属盐溶液和含有还原材料的溶液中的每一个注入反应容器的至少一个喷嘴和用于在反应容器中产生磁场的磁体 其中喷嘴对磁场开放并且定位成使得金属盐a的溶液 并且当注入时将还原材料的溶液混合。
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公开(公告)号：US4437882A
公开(公告)日：1984-03-20
申请号：US517304
申请日：1983-07-26
CPC分类号： H01F1/065 , B22F1/02 , B22F9/22 , C22C33/0285 , G11B5/70615 , H01F1/061
摘要： A ferromagnetic powder and process for producing it are disclosed. The process involves providing reducing a nickel-doped or nickel-coated iron compound in a reducing gas to provide a reduced metal powder including nickel in an amount of 3 to 30 atomic % based on the atomic % of iron present in the reduced metal powder, and treating the reduced metal powder with an organic metal powder. The resulting ferromagnetic metal powder has excellent stability with respect to oxidation and has a high saturation magnetization.
摘要翻译： 公开了一种铁磁粉末及其制造方法。 该方法包括在还原气体中还原镍掺杂或镀镍的铁化合物，以提供还原金属粉末，其中还原金属粉末包含以还原金属粉末中存在的铁的原子％为3至30原子％的量， 并用有机金属粉末处理还原的金属粉末。 所得铁磁性金属粉末相对于氧化具有优异的稳定性，并具有高的饱和磁化强度。
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3.发明授权Ferromagnetic metal particles of iron alloyed with Ti, V, Cr, Mn, Co, Ni, Cu, Zn, Si, P, Mo, Sn, Sb and Ag coated with mono- or dialkoxysilanes 失效与单或双烷氧基硅烷涂覆的Ti，V，Cr，Mn，Co，Ni，Cu，Zn，Si，P，Mo，Sn，Sb和Ag合金的铁磁性金属颗粒
公开(公告)号：US4475946A
公开(公告)日：1984-10-09
申请号：US530436
申请日：1983-09-08
CPC分类号： B22F1/02 , H01F1/061 , Y10S428/90 , Y10T428/256 , Y10T428/2991 , Y10T428/2995
摘要： Ferromagnetic metal particles are disclosed, which have a silane compound on the surface thereof. The silane compound is represented by the formula:R.sub.n --Si--(OR').sub.4-nwherein R and R' each represent an alkyl group and n represents 2 or 3. The ferromagnetic metal particles have excellent oxidation stability and corrosion resistance. Furthermore, the ferromagnetic metal particles have good dispersibility within a binder when used in connection with producing a magnetic recording medium.
摘要翻译： 公开了在其表面上具有硅烷化合物的铁磁金属颗粒。 硅烷化合物由下式表示：Rn-Si-（OR'）4-n其中R和R'各自表示烷基，n表示2或3.铁磁性金属颗粒具有优异的氧化稳定性和耐腐蚀性。 此外，当与生产磁记录介质一起使用时，铁磁金属颗粒在粘合剂中具有良好的分散性。
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公开(公告)号：US4086374A
公开(公告)日：1978-04-25
申请号：US680418
申请日：1976-04-26
CPC分类号： H01F41/14
摘要： An improved method of making a magnetic recording material comprises providing a ferromagnetic metal thin layer which has uniaxial anisotropy in any direction on a web by means of plating.A plating solution is jetted onto the web through holes in a conveying pipe set in a plating bath. The web is then moved from the vicinity of the conveying pipe by the spouting force of the plating solution, and then conveyed along a helical path about the conveying pipe without contacting the surface of conveying pipe. Plating occurs while applying a magnetic field to the web.
摘要翻译： 制造磁记录材料的改进方法包括通过电镀提供在卷材上沿任何方向具有单轴各向异性的强磁性金属薄层。
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公开(公告)号：US4059463A
公开(公告)日：1977-11-22
申请号：US693669
申请日：1976-06-07
申请人： Masashi Aonuma , Tatsuji Kitamoto , Goro Akashi
发明人： Masashi Aonuma , Tatsuji Kitamoto , Goro Akashi
摘要： Ferromagnetic powders comprising cobalt and/or nickel are produced by reducing cobalt and/or nickel salts in an aqueous solution containing hypophosphite ions while applying a magnetic field.
摘要翻译： 包含钴和/或镍的铁磁粉末通过在施加磁场的同时还原包含次磷酸根离子的水溶液中的钴和/或镍盐来制备。
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公开(公告)号：US4135218A
公开(公告)日：1979-01-16
申请号：US687821
申请日：1976-05-19
CPC分类号： G11B5/531 , G11B5/488 , G11B5/5521
摘要： A magnetic recording and reproducing apparatus provided with a magnetic head device comprising a supporting means having a recording magnetic head made of an alloy system magnetic material and a reproducing magnetic head made of a ferrite system magnetic material. The recording and reproducing heads are fixed relative to one another thereby eliminating the need for completely separate head mechanisms and for complex mechanisms to reliably interchange the positions of the two heads relative to the recording medium.
摘要翻译： 一种具有磁头装置的磁记录和再现装置，包括具有由合金系磁性材料制成的记录磁头的支撑装置和由铁氧体系磁性材料制成的再现磁头。 记录和再现头相对固定，从而不需要完全分离的头部机构，并且用于复杂的机构可靠地将两个头部相对于记录介质的位置交换。
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公开(公告)号：US4108787A
公开(公告)日：1978-08-22
申请号：US642826
申请日：1975-12-22
申请人： Kouichi Masaki , Teruya Shinjo , Yasuo Tamai , Tatsuji Kitamoto
发明人： Kouichi Masaki , Teruya Shinjo , Yasuo Tamai , Tatsuji Kitamoto
CPC分类号： C01G49/06 , G11B5/70652 , G11B5/70657 , G11B5/70673 , G11B5/70694 , C01P2002/52 , C01P2002/80 , C01P2004/10 , C01P2004/62 , C01P2006/42
摘要： In ferromagnetic powders mainly composed of iron oxide, the ferromagnetic iron oxide(s) comprise a superparamagnetic material which provides a peak showing superparamagnetism by measurement of the Mossbauer Effect spectrum. The ferromagnetic iron oxides are suitable for making highly sensitive magnetic recording media having excellent frequency response with lowered modulation noise.
摘要翻译： 在主要由铁氧化物组成的铁磁粉末中，铁磁性氧化铁包括超顺磁性材料，其通过测量莫斯鲍效应光谱提供了显示超顺磁性的峰。 铁磁铁氧化物适用于制造具有优异频率响应且调制噪声降低的高灵敏度磁记录介质。
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公开(公告)号：US4410565A
公开(公告)日：1983-10-18
申请号：US352224
申请日：1982-02-25
申请人： Tatsuji Kitamoto , Ryuji Shirahata , Yasuo Tamai
发明人： Tatsuji Kitamoto , Ryuji Shirahata , Yasuo Tamai
IPC分类号： G11B5/66 , C09D167/00 , G11B5/64 , G11B5/65 , G11B5/738 , G11B5/84 , G11B5/851 , H01F41/20 , H01F10/02
摘要： A magnetic recording medium comprising a substrate, a thermoplastic prime coat provided thereon, and a ferromagnetic metal layer having columnar grains which at least partially penetrate into the prime coat from the top thereof and are integrated therewith. The medium is prepared by applying a prime coat onto a substrate, forming a magnetic metal layer having columnar grains by vapor deposition, and then heating and pressing the obtained combination.
摘要翻译： 一种磁记录介质，包括基底，其上提供的热塑性底涂层，以及具有至少部分地从其顶部渗透到底涂层中并与其一体化的柱状颗粒的强磁性金属层。 通过将基底涂布在基板上，通过气相沉积形成具有柱状晶粒的磁性金属层，然后加热并压制所得到的组合来制备介质。
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公开(公告)号：US4354908A
公开(公告)日：1982-10-19
申请号：US923752
申请日：1978-07-11
申请人： Ryuji Shirahata , Tatsuji Kitamoto , Yasuo Tamai , Masaaki Suzuki
发明人： Ryuji Shirahata , Tatsuji Kitamoto , Yasuo Tamai , Masaaki Suzuki
CPC分类号： H01F41/14
摘要： A process for the production of a magnetic recording member which comprises effecting electric field vapor deposition under conditions such that the angle of incidence at which the vapor beam of a ferromagnetic metal strikes a support is at least about 50.degree. and the electric field between the support and a vaporization source is at least about 5 kv/m.
摘要翻译： 一种用于制造磁记录部件的方法，包括在使铁磁金属的蒸气束撞击载体的入射角至少为约50°的条件下进行电场气相沉积，并且支撑体 并且蒸发源为至少约5kv / m。
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公开(公告)号：US4678682A
公开(公告)日：1987-07-07
申请号：US496734
申请日：1983-05-20
CPC分类号： G11B5/845
摘要： The perpendicular magnetic orientation of a magnetic layer containing platelet-form ferromagnetic particles coated on a web support is effectively performed by passing a web having thereon the coated magnetic layer in an undried state through a magnetic field formed by plural pairs of opposite pole type magnets disposed in the travelling direction of the web with a gap between adjacent pairs of magnets, while supplying drying air through each gap onto the surface of the travelling web to substantially complete the drying of the coated layer while the web is in the magnetic field. A partition may be inserted in each gap so that the lower end of the partition is close to the upper surface of the travelling web to divide the gap into a front section and a back section, and the drying air may be passed through these sections.
摘要翻译： 通过使其上具有涂覆的磁性层的卷材在未干燥状态下通过由多对成对的相对极型磁体形成的磁场而使包含在片状载体上的含有片状铁磁颗粒的磁性层的磁性层的垂直磁性取向 在相邻成对的磁体之间具有间隙的幅材的行进方向上，同时通过每个间隙将干燥空气提供到行进幅材的表面上，以在幅材处于磁场的同时基本上完成涂覆层的干燥。 可以在每个间隙中插入隔板，使得隔板的下端靠近行进网的上表面，以将间隙分成前部和后部，并且干燥空气可以通过这些部分。
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