专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明授权

US4804561A Process for producing ferromagnetic metal fine particles 失效
标题翻译：铁磁性金属微粒的制造方法
公开(公告)号：US4804561A
公开(公告)日：1989-02-14
申请号：US106278
申请日：1987-10-09
申请人： Satoshi Tanioka , Yasuyuki Nishimoto , Yasuto Adachi
发明人： Satoshi Tanioka , Yasuyuki Nishimoto , Yasuto Adachi
IPC分类号： H01F1/06 , B22F1/02 , B22F9/22 , G11B5/706 , G11B5/84 , B05D5/12 , B05D7/00 , B22F3/00 , C04B35/64
CPC分类号： B22F9/22 , B22F1/025 , G11B5/70605 , G11B5/84
摘要： A process for producing ferromagnetic metal fine particles having superior magnetic characteristics, particularly, high saturation magnetization, well-balanced coercive force, having prevented sintering of particles between one another and also having superior dispersibility each particle, superior dispersibility of magnetic paints and improved corrosion resistance is provided, which process comprises adhering a compound of a metal such as Ni, etc. onto the surface of iron .alpha.-oxyhydroxide particles in water, depositing a silicon compound and an aluminum compound onto the resulting particles in alkaline water, filtering off and drying the resulting iron .alpha.-oxyhydroxide, calcining the particles in a non-reducing gas atmosphere and reducing the particles on heating.
摘要翻译：具有优异的磁特性，特别是高饱和磁化强度，良好平衡矫顽力的铁磁性金属微粒的制造方法，能够防止颗粒彼此烧结，并且每个颗粒具有优异的分散性，优异的磁性涂料分散性和改善的耐腐蚀性该方法包括将诸如Ni等金属的化合物粘附在水中的α-氧化氢铁颗粒表面上，在碱性水中将所得颗粒沉积在硅酸盐化合物和铝化合物中，过滤并干燥得到的铁α-氧化氢铁，在非还原气体气氛中煅烧颗粒并在加热时还原颗粒。

42. 发明授权

US4773931A Spindle ferromagnetic alloy particles 失效
标题翻译：主轴铁磁合金颗粒
公开(公告)号：US4773931A
公开(公告)日：1988-09-27
申请号：US8113
申请日：1987-01-23
申请人： Akio Mishima , Yosiro Okuda , Hiroshi Sumita , Yoshitaka Yoshinaga , Akira Mukaizaka , Tokihiro Kurata
发明人： Akio Mishima , Yosiro Okuda , Hiroshi Sumita , Yoshitaka Yoshinaga , Akira Mukaizaka , Tokihiro Kurata
IPC分类号： B22F9/22 , C22C33/02 , G11B5/706 , H01F1/06 , B22F1/00
CPC分类号： B22F9/22 , C22C33/0257 , G11B5/70615 , H01F1/065
摘要： Disclosed herein is spindle ferromagnetic alloy particles having the aspect ratio (major:minor) of less than 3:1 and the coercive force of 500 to 100 Oe, and containing 0.1 to 13 atomic % of Si to Fe, and a process for producing the same.
摘要翻译：本文公开了具有小于3:1的纵横比（主要：次要）小于3:1的矫顽力和500至100Oe的矫顽力并且含有0.1至13原子％的Si与Fe的锭心铁磁合金颗粒，以及用于制备相同。

43. 发明授权

US4690710A Process for producing cobalt metal powder 失效
标题翻译：钴金属粉末生产工艺
公开(公告)号：US4690710A
公开(公告)日：1987-09-01
申请号：US793079
申请日：1985-10-31
申请人： Richard A. Scheithauer , Clarence D. Vanderpool , Michael J. Miller , Richard G. W. Gingerich
发明人： Richard A. Scheithauer , Clarence D. Vanderpool , Michael J. Miller , Richard G. W. Gingerich
IPC分类号： B22F9/22 , B22F9/24 , C01G51/00 , C22B23/00 , C22C1/04
CPC分类号： B22F9/22 , C22B23/0423 , C22B23/0461
摘要： A process is disclosed for producing pure cobalt metal powder. The process involves contacting a cobaltous salt with a sufficient amount of an alkaline earth halide in an aqueous solution at a sufficient temperature for a sufficient time to form a solution which is essentially cobaltous halide and a solid which consists essentially of a salt of the alkaline earth and the anion of the cobaltous salt. The cobaltous halide solution is removed from the solid and the ions in the solution are complexed with ammonia in the presence of a catalyst to form a cobaltic hexammine ion. The resulting solution is treated with an acid in the presence of halide ions to form a cobaltic hexammine halide precipitate which is removed from the resulting mother liquor and dissolved in an aqueous solution to form a relatively pure solution which is treated with a sufficient amount of a metallic hydroxide to form a cobalt containing precipitate which is reduced to cobalt metal.
摘要翻译：公开了用于生产纯钴金属粉末的方法。该方法包括将钴盐与足量的碱土卤化物在水溶液中在足够的温度下接触足够的时间以形成基本上为卤化钴和基本上由碱土金属盐组成的固体的溶液和钴耳盐的阴离子。将卤化钴溶液从固体中除去，并且在催化剂存在下，溶液中的离子与氨络合以形成钴六胺离子。所得溶液在卤离子存在下用酸处理以形成钴六卤化物沉淀物，其从所得母液中除去并溶解在水溶液中以形成相对纯的溶液，该溶液用足量的金属氢氧化物以形成还原成钴金属的含钴沉淀物。

44. 发明授权

US4684401A Chromium-cobalt fine alloy powder and process for producing same 失效
标题翻译：铬钴合金粉及其制造方法
公开(公告)号：US4684401A
公开(公告)日：1987-08-04
申请号：US861884
申请日：1986-05-12
申请人： Judith A. Ladd , Clarence D. Vanderpool
发明人： Judith A. Ladd , Clarence D. Vanderpool
IPC分类号： B22F1/00 , B22F9/22 , C22B5/12 , C22B23/02 , C22B34/32
CPC分类号： C22B5/12 , B22F1/0048 , B22F9/22 , C22B23/021 , C22B34/32 , Y10S75/953
摘要： A chromium-cobalt alloy fine powder is disclosed which consists essentially of spheres with the chromium and cobalt being relatively uniformly distributed throughout the particles of the powder. The process for producing the powder is disclosed. The process involves firing a relatively uniform admixture consisting essentially of anhydrous cobalt (II) chloride and chromium (III) chloride in a furnace in a hydrogen atmosphere at a first temperature of at least about 400.degree. C. and below the sublimation temperature of chromium (III) chloride for a time sufficient to reduce essentially all of the cobalt (II) chloride to cobalt metal and to reduce essentially all of the chromium (III) chloride to chromium (II) chloride. The temperature is elevated to a second temperature of at least about 750.degree. C. and below the sublimation temperature of chromium (II) chloride. The elevation is done by raising the temperature in increments of about 100.degree. C. and holding at the elevated temperature until the evolution of HCl gas ceases. The first reduced mixture is fired at the second temperature for a time sufficient to to reduce essentially all of the chromium (II) chloride to chromium metal without causing appreciable melting of the cobalt metal, to form the alloy powder which is then cooled in a non-oxidizing atmosphere.
摘要翻译：公开了一种铬钴合金细粉末，其基本上由具有相对均匀分布在粉末颗粒中的铬和钴的球体组成。公开了制造粉末的方法。该方法包括在氢气氛中的炉中，在至少约400℃的第一温度和低于铬的升华温度（1）的温度下，在熔炉中焙烧基本上由无水氯化钴（II）和氯化铬（III）组成的相对均匀的混合物 III）氯化物的时间足以将氯化钴（II）基本上全部还原成钴金属，并将氯化物基本上全部还原成氯化铬（II）。将温度升高至至少约750℃并低于氯化铬（II）的升华温度的第二温度。升高通过以约100℃的增量升高温度并保持在升高的温度直到HCl气体的释放停止。将第一种还原的混合物在第二温度下烧制足以将氯化铬（II）全部还原成铬金属的时间，而不引起钴金属明显的熔化，形成合金粉末，然后将其冷却成非金属氧化气氛。

45. 发明授权

US4650597A Preparation of finely divided isotropic cobalt-containing ferrite powder 失效
标题翻译：精细分散各向同性含钴铁素体粉末的制备
公开(公告)号：US4650597A
公开(公告)日：1987-03-17
申请号：US731720
申请日：1985-05-08
申请人： Hartmut Hibst , Helmut Jakusch
发明人： Hartmut Hibst , Helmut Jakusch
IPC分类号： B22F9/22 , B22F9/26 , C01G49/00 , G11B5/706 , H01F1/11 , C01G49/08
CPC分类号： G11B5/70678
摘要： Finely divided ferrite powder of the general formulaCo.sub.x Fe.sub.3-x O.sub.4.5-0.5 xwhere x is from greater than zero to one, having an essentially isotropic particle shape, is prepared by oxidation of ferrite powder of the composition Co.sub.x Fe.sub.3-x O.sub.4, where x has the same limits, with an oxygen-containing gas at from 150.degree. to 500.degree. C.
摘要翻译：通过氧化CoxFe3-xO4组合物的铁素体粉末制备具有基本上各向同性的颗粒形状的通式为CoxFe3-xO4.5-0.5x的细分铁氧体粉末，其中x大于零至1，其中x具有相同的限制，含有150〜500℃的含氧气体。

46. 发明授权

US4437882A Ferromagnetic powder treated with an organic silane compound 失效
标题翻译：用有机硅烷化合物处理的铁磁粉末
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。

47. 发明授权

US4437881A Acicular ferromagnetic alloy particles and process for producing said particles 失效
标题翻译：针状铁磁合金颗粒及其制备方法
公开(公告)号：US4437881A
公开(公告)日：1984-03-20
申请号：US513866
申请日：1983-07-14
申请人： Akio Mishima , Yoshiro Okuda , Tosiharu Harada , Akira Mukaizaka , Tomoyuki Imai
发明人： Akio Mishima , Yoshiro Okuda , Tosiharu Harada , Akira Mukaizaka , Tomoyuki Imai
IPC分类号： G11B5/706 , B22F9/22
CPC分类号： G11B5/70615
摘要： Acicular ferromagnetic alloy particles doped with silicon, chromium and nickel and optionally magnesium and a process for producing said particles comprising heating at 300.degree. to 500.degree. C. under reducing atmosphere acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium or acicular particles of .alpha.-ferric oxide doped with silicon, chromium and nickel and optionally magnesium obtained by dehydrating the acicular particles of .alpha.-iron(III) oxide hydroxide doped with silicon, chromium and nickel and optionally magnesium are disclosed herein.
摘要翻译：掺杂有硅，铬和镍以及任选的镁的针状铁磁性合金颗粒和一种制备所述颗粒的方法，包括在还原性气氛下在300℃至500℃下加热掺杂有硅，铬（III）的α-铁氧化物氢氧化物的针状颗粒公开了镍和任选的掺有硅，铬和镍的α-氧化铁的镁或针状颗粒和任选的镁，其通过使掺杂有硅，铬和镍以及任选的镁的α-铁（III）氧化物氢氧化物的针状颗粒脱水获得，这里。

48. 发明授权

US4348430A Process for producing magnetic particles for magnetic recording medium 失效
标题翻译：磁记录介质用磁性粒子的制造方法
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。

49. 发明授权

US4306921A Production of magnetic powder 失效
标题翻译：生产磁粉
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。

50. 发明授权

US4305752A Metallic iron particles for magnetic recording 失效
标题翻译：用于磁记录的金属铁颗粒
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。

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