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1. 发明授权

US4363831A Process for producing magnetic powder having high coercive force 失效
标题翻译：具有高矫顽力的磁粉的制造方法
公开(公告)号：US4363831A
公开(公告)日：1982-12-14
申请号：US190958
申请日：1980-09-26
申请人： Shinji Umeki , Kazuo Takada
发明人： Shinji Umeki , Kazuo Takada
IPC分类号： C01G51/00 , G11B5/706 , H01F1/11 , B05D5/12
CPC分类号： G11B5/70647 , G11B5/70657 , G11B5/70673
摘要： A magnetic iron oxide powder which has high coercive force and stable magnetic characteristics is produced by forming a surface layer of the magnetic iron oxide powder which comprises a cobalt compound as a main component. The magnetic iron oxide powder is treated with an aqueous solution of a cobalt ion for two times or more to form at least two surfaces comprising the cobalt compound.
摘要翻译：通过形成包含钴化合物作为主要成分的磁性氧化铁粉末的表面层，产生具有高矫顽磁力和稳定磁特性的磁性氧化铁粉末。将磁性氧化铁粉末用钴离子的水溶液处理2次以上以形成至少两个包含钴化合物的表面。

2. 发明授权

US4451502A Method for manufacturing magnetic recording medium 失效
标题翻译：磁记录介质的制造方法
公开(公告)号：US4451502A
公开(公告)日：1984-05-29
申请号：US409952
申请日：1982-08-20
申请人： Kazuo Takada , Shinji Umeki
发明人： Kazuo Takada , Shinji Umeki
IPC分类号： B05D3/14 , G11B5/845
CPC分类号： B05D3/207 , G11B5/845
摘要： A method for manufacturing a magnetic recording medium including the steps of applying a magnetic coating containing magnetic particles therein to a support, subjecting said support having the magnetic coating thereon to magnetic orientation treatment while the magnetic coating is still in fluid condition and thereafter drying the magnetic coating, characterized in that said magnetic orientation is effected by passing said support having the magnetic coating thereon through a magnetic orientation field generated from magnetic field generating means which comprises one or more permanent or DC magnets and an array of a plurality of parallel elongated members of a soft magnetic material arranged substantially in a plane close and parallel to said support and adapted to be magnetized by said magnet or magnets.
摘要翻译：一种制造磁记录介质的方法，包括以下步骤：将含有磁性颗粒的磁性涂层施加到载体上，在磁性涂层仍处于流体状态下使其上具有磁性涂层的所述载体进行磁性取向处理，然后干燥磁性涂层，其特征在于，所述磁性取向通过使其上具有磁性涂层的所述支撑件通过磁场产生装置产生的磁取向场来实现，所述磁场产生装置包括一个或多个永久或DC磁体和多个平行细长构件的阵列一种软磁材料，其基本上布置在与所述支撑件相近并平行的平面中并且适于被所述磁体或磁体磁化。

3. 发明授权

US4321302A Process for producing magnetic powder having high coercive force 失效
标题翻译：具有高矫顽力的磁粉的制造方法
公开(公告)号：US4321302A
公开(公告)日：1982-03-23
申请号：US143514
申请日：1980-04-24
申请人： Shinji Umeki , Toshihiro Hamabata , Kazuaki Onuki , Kazuo Takada
发明人： Shinji Umeki , Toshihiro Hamabata , Kazuaki Onuki , Kazuo Takada
IPC分类号： C01G49/02 , C01G49/00 , G11B5/706 , G11B21/00 , G11B23/00 , H01F1/11 , C01G49/06 , C01G49/08
CPC分类号： G11B5/70673 , Y10T428/2993
摘要： A magnetic iron oxide powder having high coercive force is produced by dispersing a magnetic iron oxide comprising a silicon component and a phosphorus component in an aqueous solution of a cobalt ion and adding a base to the dispersion to be an alkaline condition and heat-treating the dispersion whereby the cobalt ion is adsorbed and diffused in the surface layer of the magnetic iron oxide. A zinc component can be also incorporated in the crystal. The silicon component and the phosphorus component are preferably incorporated in the crystalline structure.
摘要翻译：通过将包含硅成分和磷成分的磁性氧化铁分散在钴离子的水溶液中，并将碱分散在碱性条件下进行热处理，得到具有高矫顽力的磁性氧化铁粉末分散体，其中钴离子被吸附并扩散到磁性氧化铁的表面层中。锌成分也可以掺入到晶体中。硅组分和磷组分优选掺入晶体结构中。

4. 发明授权

US3977985A Magnetic recording medium comprising cobalt or cobalt alloy coated particles of spicular magnetite 失效
标题翻译：磁记录介质，包括钴或钴合金涂层的磁铁矿颗粒
公开(公告)号：US3977985A
公开(公告)日：1976-08-31
申请号：US532681
申请日：1974-12-13
申请人： Shinji Umeki , Fujio Shibata , Kazuo Takada
发明人： Shinji Umeki , Fujio Shibata , Kazuo Takada
IPC分类号： B22F1/02 , C22C1/04 , G11B5/706 , G11B5/712 , B22F3/00 , H01F1/04
CPC分类号： G11B5/712 , B22F1/025 , C22C1/04 , G11B5/70689
摘要： A magnetic recording medium is disclosed as comprising powdered magnetic particles upon which there is deposited a ferro-magnetic metal or alloy such as cobalt or a cobalt alloy. Each magnetic particle is a spiculate magnetite and the deposite of cobalt or a cobalt alloy is in the range of 0.5 wt.% to 30 wt.%. The particles are heat treated in either a reducing or inert atmosphere to a sufficient temperature to improve the magnetic characteristics of the particles including their coercive force, Br/.rho. and Bm/.rho.. A layer of the recording medium is disposed on a support layer of polyester to form a magnetic tape.
摘要翻译：公开了一种磁记录介质，其包括粉末状磁性颗粒，其上沉积有铁磁性金属或合金例如钴或钴合金。每个磁性颗粒是一种粉状磁铁矿，钴或钴合金的沉积物在0.5重量％至30重量％的范围内。将颗粒在还原或惰性气氛中热处理至足够的温度以改善颗粒的磁特性，包括其矫顽力Br / rho和Bm / rho。记录介质层设置在聚酯的支撑层上以形成磁带。

5. 发明授权

US4069367A Magnetic powder material comprising iron oxide particles with a copper-cobalt alloy coating 失效
标题翻译：含铜钴合金涂层的氧化镁颗粒的磁性粉末材料
公开(公告)号：US4069367A
公开(公告)日：1978-01-17
申请号：US323293
申请日：1973-01-12
申请人： Shinji Umeki , Kazuhide Aue , Yasumichi Tokuoka
发明人： Shinji Umeki , Kazuhide Aue , Yasumichi Tokuoka
IPC分类号： H01F1/11 , B22F9/24 , G11B5/706 , H01F1/02 , C04B35/00 , C22B1/04
CPC分类号： B22F9/24 , G11B5/70642 , Y10S428/90 , Y10S428/928 , Y10T428/2991
摘要： A powder magnetic material for use as a magnetic recording medium and a method of its manufacture are disclosed. More particularly, the disclosed powder magnetic material is adapted to provide a magnetic recording medium of low electric resistance. In particular, an alloy of cobalt and at least one element selected from the group consisting of vanadium, molybdenum, copper, manganese, nickel, zinc and iron is deposited onto the surface of particles of magnetic iron oxides such as Fe.sub.3 O.sub.4 or .gamma.Fe.sub.2 O.sub.3 to provide a powdered magnetic material of high coercivity, high magnetic flux density and low electric resistance.

6. 发明授权

US4323464A Process for producing hydrated iron oxide having silicon and phosphorus component 失效
标题翻译：制备具有硅和磷成分的水合氧化铁的方法
公开(公告)号：US4323464A
公开(公告)日：1982-04-06
申请号：US143512
申请日：1980-04-24
申请人： Shinji Umeki
发明人： Shinji Umeki
IPC分类号： C01G49/00 , C01G49/02 , G11B5/706 , H01F1/11 , C01G49/06
CPC分类号： G11B5/70668
摘要： A hydrated iron oxide comprising a silicon component and a phosphorus component is produced by adding a silicate and a phosphate in an aqueous solution of a base and mixing it with an aqueous solution of a ferrous if necessary with a small amount of zinc ion and oxidizing it under controlling pH in a range of 5.5 to 7.5.
摘要翻译：通过在碱的水溶液中加入硅酸盐和磷酸盐并将其与含铁的水溶液一起混合并用少量的锌离子并将其氧化来制备包含硅组分和磷成分的水合氧化铁在控制pH在5.5至7.5的范围内。

7. 发明授权

US4067755A Method of making powdered magnetic iron oxide material 失效
标题翻译：制造粉状磁性氧化铁材料的方法
公开(公告)号：US4067755A
公开(公告)日：1978-01-10
申请号：US616058
申请日：1975-09-23
申请人： Shinji Umeki , Kazuhide Aue , Yasumichi Tokuoka
发明人： Shinji Umeki , Kazuhide Aue , Yasumichi Tokuoka
IPC分类号： G11B5/706 , H01F1/02 , C01G49/08 , C22B1/04
CPC分类号： G11B5/70673 , G11B5/70668 , G11B5/70689 , Y10T428/2991
摘要： A method of producing a powder magnetic material for use as a magnetic recording medium is disclosed. More particularly, the disclosed powder magnetic material is adapted to provide a magnetic recording medium of low electrical resistance. In particular, an alloy of cobalt and at least one element selected from the group consisting of vanadium, molybdenum, copper, maganese, nickel, zinc and iron are deposited onto the surface of particles of magnetic iron oxides such as Fe.sub.3 O.sub.4 or .gamma.Fe.sub.2 O.sub.3. Powdered magnetic material of high coercivity, high magnetic flux density and low electrical resistance is obtained.
摘要翻译：公开了制造用作磁记录介质的粉末磁性材料的方法。更具体地，所公开的粉末磁性材料适于提供低电阻的磁记录介质。特别地，将钴和选自钒，钼，铜，锰，镍，锌和铁中的至少一种元素的合金沉积在诸如Fe 3 O 4或γFe2 O 3的磁性氧化铁颗粒的表面上。得到高矫顽力，高磁通密度，低电阻的粉末状磁性材料。

8. 发明授权

US4302510A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US4302510A
公开(公告)日：1981-11-24
申请号：US143895
申请日：1980-04-25
申请人： Shinji Umeki , Kazuaki Onuki , Fumio Maruta
发明人： Shinji Umeki , Kazuaki Onuki , Fumio Maruta
IPC分类号： G11B5/70 , C09D5/23 , C09D7/12 , G11B5/706 , G11B5/712 , G11B5/842 , H01F1/11 , B32B5/16
CPC分类号： G11B5/70694 , Y10S428/90 , Y10T428/257 , Y10T428/2991
摘要： A magnetic recording medium having more than 550 Oersted of a coercive force, less than 1.8 of a ratio of a coercive force at -196.degree. C. to a coercive force at 25.degree. C., less than 1.0 wt. % of a content of Fe.sup.2+ is prepared by incorporating a magnetic powder obtained by dispersing acicular .gamma.-Fe.sub.2 O.sub.3 in an aqueous solution of a cobalt salt and reducing it with a reducing agent to deposit a cobalt compound on the acicular .gamma.-Fe.sub.2 O.sub.3.
摘要翻译：具有超过550矫顽力奥斯特的磁记录介质，在-196℃下的矫顽力与矫顽力在25℃下的比值小于1.8，小于1.0重量％。通过将针状γ-Fe 2 O 3分散在钴盐水溶液中而得到的磁性粉末并用还原剂还原，在针状γ-Fe 2 O 3上析出钴化合物，可以制备Fe2 +含量的％。

9. 发明授权

US4255409A Process for producing acicular goethite 失效
标题翻译：针状针铁矿生产工艺
公开(公告)号：US4255409A
公开(公告)日：1981-03-10
申请号：US102441
申请日：1979-12-11
申请人： Toshihiro Hamabata , Shinji Umeki
发明人： Toshihiro Hamabata , Shinji Umeki
IPC分类号： C01G49/02 , C01G49/06 , G11B5/706 , H01F1/11
CPC分类号： G11B5/70657 , C01G49/06 , C01P2004/10 , C01P2004/62 , C01P2006/12 , C01P2006/42
摘要： An alkali hydroxide is added to an aqueous solution of ferrous salt to form a precipitate and a part of the solution is separated to control a ratio of an anion to a ferrous component to less than 1 and the ferrous component is oxidized to acicular goethite with an alkali metal chlorate such as potassium chlorate.
摘要翻译：将碱金属氢氧化物加入到亚铁盐水溶液中以形成沉淀物，并将一部分溶液分离以控制阴离子与亚铁组分的比例小于1，并且将亚铁组分氧化成针状针铁矿碱金属氯酸盐如氯酸钾。

10. 发明授权

US4251504A Process for producing acicular goethite 失效
标题翻译：针状针铁矿生产工艺
公开(公告)号：US4251504A
公开(公告)日：1981-02-17
申请号：US77266
申请日：1979-09-20
申请人： Toshihiro Hamabata , Shinji Umeki
发明人： Toshihiro Hamabata , Shinji Umeki
IPC分类号： C01G49/06 , G11B5/706 , C01G49/02
CPC分类号： C01G49/06 , G11B5/70663 , C01P2004/10 , C01P2004/62 , C01P2006/12 , C01P2006/42
摘要： An alkali hydroxide is added to an aqueous solution of ferrous salt to form a precipitate and a part of the solution is separated to control a ratio of an anion to a ferrous component to less than 1 and the ferrous component is oxidized to acicular goethite by bubbling air through the supernatant and precipitate.
摘要翻译：将碱金属氢氧化物加入到亚铁盐水溶液中以形成沉淀物，并且分离出一部分溶液以控制阴离子与亚铁组分的比例小于1，通过鼓泡将亚铁组分氧化成针状针铁矿空气通过上清液沉淀。

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