公开(公告)号：US4503119A

公开(公告)日：1985-03-05

申请号：US325939

申请日：1981-11-30

申请人： Ryuji Shirahata ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

发明人： Ryuji Shirahata ,  Yasuyuki Yamada ,  Tatsuji Kitamoto ,  Goro Akashi

IPC分类号： G11B5/66 ,  G11B5/64 ,  G11B5/65 ,  G11B5/725 ,  H01F41/14 ,  H01F1/06 ,  H01F1/33

CPC分类号： H01F41/14 ,  G11B5/64 ,  G11B5/725 ,  Y10S428/90 ,  Y10T428/265 ,  Y10T428/273

摘要： A magnetic recording medium which is characterized by a lubricant present in channels diagonally extending through a magnetic metal thin film having a columnar structure formed by vapor deposition; this medium possesses improved running properties and abrasion resistance which last for an extended period of time.

摘要翻译： 一种磁记录介质，其特征在于存在于通过气相沉积形成的具有柱状结构的磁性金属薄膜的对角延伸的通道中的润滑剂; 该介质具有改善的运行性能和耐磨性，持续较长时间。

公开(公告)号：US4437882A

公开(公告)日：1984-03-20

申请号：US517304

申请日：1983-07-26

申请人： Shizuo Umemura ,  Akihiro Matsufuji ,  Masashi Aonuma ,  Tatsuji Kitamoto ,  Hajime Miyatsuka

发明人： Shizuo Umemura ,  Akihiro Matsufuji ,  Masashi Aonuma ,  Tatsuji Kitamoto ,  Hajime Miyatsuka

IPC分类号： B22F1/02 ,  B22F9/22 ,  C22C33/02 ,  G11B5/706 ,  H01F1/06

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。

公开(公告)号：US4415512A

公开(公告)日：1983-11-15

申请号：US245137

申请日：1981-03-18

申请人： Leonard B. Torobin

发明人： Leonard B. Torobin

IPC分类号： B22D25/02 ,  B01D69/00 ,  B01D71/02 ,  B01J13/02 ,  B01J13/04 ,  B22F1/00 ,  B22F9/00 ,  B22F9/08 ,  B63B3/13 ,  C03B19/10 ,  C03B37/022 ,  C04B14/34 ,  C04B20/10 ,  C04B38/08 ,  C08J9/32 ,  C08K7/00 ,  C08K7/16 ,  C08K7/22 ,  C08K7/24 ,  F24J2/50 ,  G11C11/06 ,  H01F1/06 ,  H01F1/153 ,  H05H1/22

CPC分类号： G21B1/19 ,  B01D69/00 ,  B01D71/02 ,  B01J13/04 ,  B22F1/0051 ,  B22F9/082 ,  B63B3/13 ,  C03B19/1075 ,  C03B37/022 ,  C04B14/34 ,  C04B20/1055 ,  C04B38/08 ,  C08J9/32 ,  F24J2/506 ,  G11C11/06 ,  H01F1/066 ,  H01F1/1535 ,  H01F1/15358 ,  B22F2009/088 ,  B29C2049/4605 ,  B29C2049/4664 ,  C03B2203/16 ,  Y02E10/40 ,  Y02E30/16 ,  Y10S376/916 ,  Y10T428/12014 ,  Y10T428/12181

摘要： Hollow metal microspheres are made by forming a liquid film of molten film forming metal composition across a coaxial blowing nozzle and applying a blowing gas at a positive pressure on the inner surface of the metal film to blow the film and form an elongated cylinder shaped liquid film of molten metal. An inert entraining fluid is directed over and around the blowing nozzle at an angle to the axis of the blowing nozzle so that the entraining fluid dynamically induces a pulsating or fluctuating pressure field at the opposite side of the blowing nozzle in the wake of the coaxial blowing nozzle. The continued movement of the entraining fluid produces asymmetric fluid drag forces on the cylinder and closes and detaches the elongated cylinder from the coaxial blowing nozzle. Surface tension forces acting on the detached cylinder form the latter into a spherical shape which is rapidly cooled and solidified by cooling means to form a hard, smooth hollow metal microsphere. A thin metal coating can be deposited on the inner wall surface of the microspheres by using a metal vapor as the blowing gas or by adding to the blowing gas small dispersed metal particles and/or gases of organometallic compounds which are decomposed. The metal microspheres can be used to make insulation materials systems and as filler materials in plastics, plastic foam compositions, rubber and rubber compositions and in metal compositions. Filamented hollow metal microspheres with a thin metal filament connecting adjacent metal microspheres are also disclosed.

摘要翻译： 空心金属微球通过在同轴吹塑喷嘴上形成熔融成膜金属组合物的液膜并在正压下施加吹塑气体在金属膜的内表面上吹塑膜并形成细长的圆柱形液膜 的熔融金属。 惰性夹带流体以与喷嘴的轴线成一角度的方式被引导到喷嘴周围和周围，使得夹带流体在同轴吹风之后在喷嘴的相对侧处动态地引起脉动或波动的压力场 喷嘴。 夹带流体的持续运动在圆柱体上产生不对称的流体阻力，并将细长的圆柱体从同轴的喷嘴中分离出来。 作用在分离的气缸上的表面张力形成球形，通过冷却装置快速冷却和固化，形成硬的光滑的中空金属微球。 通过使用金属蒸气作为吹入气体，或者通过向发泡气体中添加小分散金属颗粒和/或分解的有机金属化合物的气体，可以在微球的内壁表面上沉积薄金属涂层。 金属微球可用于制造绝缘材料体系，并用作塑料，塑料泡沫组合物，橡胶和橡胶组合物以及金属组合物中的填料。 还公开了具有连接相邻金属微球的细金属细丝的丝状中空金属微球。

公开(公告)号：US4348430A

公开(公告)日：1982-09-07

申请号：US210801

申请日：1980-11-26

申请人： Yasumichi Tokuoka ,  Takayoshi Kobuke

发明人： Yasumichi Tokuoka ,  Takayoshi Kobuke

IPC分类号： B22F9/22 ,  C01G49/00 ,  C01G49/02 ,  C09D5/23 ,  C09D7/12 ,  G11B5/706 ,  H01F1/06 ,  H01F1/11 ,  B05D7/00

CPC分类号： G11B5/70657

摘要： A process for producing magnetic particles for a magnetic recording medium from an acicular goethite as a starting material comprises a step of growing a Si-component-containing goethite as an outer layer.

摘要翻译： 从针状针铁矿作为起始材料制造用于磁记录介质的磁性颗粒的方法包括使含Si组分的针铁矿生长为外层的步骤。

公开(公告)号：US4332863A

公开(公告)日：1982-06-01

申请号：US175530

申请日：1980-08-05

申请人： Akihiko Hosaka

发明人： Akihiko Hosaka

IPC分类号： G11B5/712 ,  C09D5/23 ,  C09D7/12 ,  G11B5/72 ,  H01F1/06 ,  H01F10/10

CPC分类号： H01F1/065 ,  G11B5/722 ,  Y10S428/90

摘要： A magnetic recording medium comprises a substrate coated with a binder and a magnetic powder obtained by forming an oleic acid layer on a surface of a metal or alloy magnetic powder obtained by a dry reduction.

摘要翻译： 磁记录介质包括涂覆有粘合剂的基材和通过在通过干还原获得的金属或合金磁性粉末的表面上形成油酸层而获得的磁性粉末。

公开(公告)号：US4306921A

公开(公告)日：1981-12-22

申请号：US18125

申请日：1979-03-07

申请人： Shintaro Suzuki ,  Sadao Iizuka ,  Yoshimi Moriya

发明人： Shintaro Suzuki ,  Sadao Iizuka ,  Yoshimi Moriya

IPC分类号： B22F9/22 ,  B22F1/02 ,  H01F1/06

CPC分类号： B22F1/025 ,  H01F1/065

摘要： The magnetic characteristics of magnetic powder consisting mainly of iron are improved by pre-treating the starting material from which the magnetic powder is prepared by reduction, with an aqueous solution and/or suspension of one member selected from the group consisting of cobalt, nickel, manganese and antimony compounds and mixtures thereof.

摘要翻译： 主要由铁组成的磁性粉末的磁特性通过预处理通过还原制备磁粉的起始材料，通过选自钴，镍，镍等的一种成分的水溶液和/或悬浮液来改进， 锰和锑化合物及其混合物。

公开(公告)号：US4305752A

公开(公告)日：1981-12-15

申请号：US156559

申请日：1980-06-05

申请人： Louis J. Dizikes

发明人： Louis J. Dizikes

IPC分类号： B22F1/02 ,  B22F9/22 ,  C21B13/00 ,  H01F1/06 ,  C22B5/12

CPC分类号： C21B13/008 ,  B22F1/025 ,  B22F9/22 ,  H01F1/061 ,  H01F1/065 ,  Y02P10/136 ,  Y10T428/12181

摘要： In the process for preparing a magnetically stable powder comprising the steps of reducing an iron oxide precursor with a gaseous reduction agent and stabilizing the metallic powder thus produced, the improvement which comprises coating said iron oxide precursor with an antimony compound at a level of up to about 7 weight percent antimony based on the weight of the iron oxide content of the precursor and precipitating tin hydroxides or oxyhydroxides at a level of from about 0.5 to about 8.0 weight percent tin based on the weight of the iron oxide content of the precursor onto the antimony coated iron oxide precursor prior to said reduction.

摘要翻译： 在制备磁稳定粉末的方法中，包括以下步骤：用气态还原剂还原氧化铁前体并使由此产生的金属粉末稳定，其改进包括用锑化合物涂覆所述氧化铁前体至多达 约7重量％的锑，基于前体的氧化铁含量的重量，并将锡氢氧化物或羟基氧化物以约0.5至约8.0重量％的锡的水平沉淀，基于前体的氧化铁含量的重量， 锑包覆的氧化铁前体在所述还原之前。

公开(公告)号：US4221614A

公开(公告)日：1980-09-09

申请号：US20142

申请日：1979-03-13

申请人： Minoru Yoda ,  Yasumichi Tokuoka

发明人： Minoru Yoda ,  Yasumichi Tokuoka

IPC分类号： B22F1/00 ,  H01F1/06 ,  H01F1/02

CPC分类号： B22F1/0085 ,  H01F1/065

摘要： A method of manufacturing a ferromagnetic metal powder characterized by continuously drying a slurry of ferromagnetic metal powder formed by wet reduction, in a non-oxidizing gas atmosphere, and subsequently continuously heat-treating the dried ferromagnetic metal powder in a non-oxidizing gas atmosphere. The continuous method prevents the ferromagnetic metal powder from being exposed to excess oxygen to enhance the magnetic properties of the ferromagnetic metal powder. Also, the production efficiency is enhanced.

摘要翻译： 一种铁磁性金属粉末的制造方法，其特征在于，在非氧化性气体气氛中，通过湿式还原形成的铁磁性金属粉末的浆料连续地干燥，然后在非氧化性气体气氛中连续地对所述干燥的铁磁性金属粉末进行热处理。 连续方法防止强磁性金属粉末暴露于过量的氧气，以增强铁磁性金属粉末的磁性能。 此外，生产效率提高。

公开(公告)号：US4178171A

公开(公告)日：1979-12-11

申请号：US888508

申请日：1978-03-20

申请人： Werner Steck ,  Rudolf Brodt ,  Wilhelm Sarnecki ,  Helmut Jakusch ,  Manfred Ohlinger ,  Eberhard Koester

发明人： Werner Steck ,  Rudolf Brodt ,  Wilhelm Sarnecki ,  Helmut Jakusch ,  Manfred Ohlinger ,  Eberhard Koester

IPC分类号： G11B5/706 ,  B22F9/22 ,  C09D5/23 ,  C09D7/12 ,  C21B15/00 ,  G11B5/712 ,  G11B5/714 ,  H01F1/06 ,  B22F9/00

CPC分类号： H01F1/065 ,  B22F9/22 ,  C21B15/00 ,  G11B5/714

摘要： A process for the manufacture of acicular ferromagnetic iron particles by reducing acicular iron(III) oxide hydroxides which consist of pure synthetic lepidocrocite or a mixture of synthetic goethite and at least 70% by weight of synthetic lepidocrocite.The iron(III) oxide hydroxides used carry, on their surface, an alkaline earth metal cation and an anion of a monobasic, dibasic or tribasic aliphatic carboxylic acid of up to 6 carbon atoms or an organic compound containing at least two groups capable of chelating the alkaline earth metal cation, and are produced in such a way that they consist of at least 70 percent by weight of lepidocrocite and have a length-to-width ratio of not less than 15:1.Reduction of such iron(III) oxide hydroxides gives iron particles with pronounced shape anisotropy, which exhibit both good magnetic properties and a narrow field strength distribution.

摘要翻译： 通过还原针状铁（III）氢氧化物来制造针状铁磁性铁粒子的方法，该针状铁氧化物由纯合成锂铁矿石或合成针铁矿和至少70％重量的合成锂铁矿石混合物组成。 所用的氧化铁（III）氢氧化物在其表面上带有至多6个碳原子的一元，二元或三元脂肪族羧酸的碱土金属阳离子和阴离子，或含至少两个能够螯合的基团的有机化合物 碱土金属阳离子，并且以这样的方式制备，使得它们由至少70重量％的氯铁矿石组成，并且具有不小于15:1的长宽比。 这种氧化还原铁（III）氢氧化物的还原产生具有显着形状各向异性的铁颗粒，其具有良好的磁性能和窄的场强分布。

公开(公告)号：US4113528A

公开(公告)日：1978-09-12

申请号：US744115

申请日：1976-11-22

申请人： Yasumichi Tokuoka ,  Kazumasa Fukuda

发明人： Yasumichi Tokuoka ,  Kazumasa Fukuda

IPC分类号： B22F1/02 ,  G11B5/706 ,  H01F1/06 ,  H01F1/09

CPC分类号： G11B5/70621 ,  H01F1/061

摘要： Ferromagnetic metal or alloy particles are prepared by reducing ferromagnetic metal ions in the solution with a reducing agent under a magnetic field to obtain a slurry of ferromagnetic metal or alloy particles and adding an oxidizing agent to an aqueous slurry containing the ferromagnetic metal or alloy particles to prevent deterioration of magnetic characteristics.