-
公开(公告)号：US4071610A
公开(公告)日：1978-01-31
申请号：US677920
申请日：1976-04-19
CPC分类号： G11B5/70673 , C01G49/06 , G11B5/70663 , C01P2006/42
摘要： A process for the manufacture of acicular gamma-iron(III) oxide, in which the non-magnetic, acicular iron(III) oxide is treated with a solution of a compound of the formula I ##STR1## where R.sup.1 and R.sup.2 are ##STR2## or O--R.sup.5, R.sup.3 is H, OH, ##STR3## or O--R.sup.5, R.sup.4 is alkyl or cycloalkyl of 1 to 16 carbon atoms and the R.sup.4 's may be identical or different, and R.sup.5 is alkyl, cycloalkyl or aralkyl of 3 to 18 carbon atoms, and is then converted to gamma-iron(III) oxide by reduction to magnetite, followed by oxidation.The gamma-iron(III) oxide obtained is distinguished by a high coercive force and improved magnetic orientation when used as a magnetic pigment for the manufacture of magnetic recording media.
摘要翻译： 一种用于制造针状γ-铁（III）氧化物的方法，其中非磁性针状铁（III）氧化物用式I化合物（I）的溶液处理，其中R1和R2 或者O-R5，R 3是H，OH，O或R 5，R 4是1至16个碳原子的烷基或环烷基，R 4可以相同或不同，R 5是烷基，环烷基或 3至18个碳原子的芳烷基，然后通过还原成磁铁矿转化为γ-铁（III）氧化物，随后进行氧化。
-
公开(公告)号：US4018882A
公开(公告)日：1977-04-19
申请号：US616863
申请日：1975-09-25
申请人： Eberhard Koester , Gerd Wunsch , Eduard Schoenafinger , Hans Henning Schneehage , Helmut Jakusch
发明人： Eberhard Koester , Gerd Wunsch , Eduard Schoenafinger , Hans Henning Schneehage , Helmut Jakusch
CPC分类号： G11B5/70663 , C01G49/06 , C01P2004/10 , C01P2006/42
摘要： A process for the manufacture of acicular magnetic gamma-iron(III) oxide by reducing acicular alpha-iron(III) oxide to magnetite and then oxidizing it to gamma-iron(III) oxide, wherein the alpha-iron(III) oxide is treated with a water-soluble alkaline earth metal compound and an alkylphenol with one to three alkyl radicals, each of 4 to 24 carbon atoms, on the benzene nucleus. Gamma-iron(III) oxides manufactured in this way show better magnetic orientability in the binder-containing dispersion, and a higher coercive force than prior art magnetic pigments.
摘要翻译： 通过将针状氧化铁（III）还原成磁铁矿然后将其氧化成γ-铁（III）氧化物来制造针状磁性γ-铁（III）氧化物的方法，其中氧化铁（III）为 在苯核上用水溶性碱土金属化合物和烷基酚与一至三个碳原子数为4〜24个的烷基进行处理。 以这种方式制造的γ-氧化铁（III）氧化物在含粘合剂的分散体中显示出更好的磁定向性，并且比现有技术的磁性颜料具有更高的矫顽力。
-
公开(公告)号：US4017303A
公开(公告)日：1977-04-12
申请号：US595563
申请日：1975-07-14
CPC分类号： C09C1/62 , C01P2006/42
摘要： A process for the manufacture of acicular ferromagnetic metal pigments containing iron, having a reduced field strength distribution and a steeper residual magnetization curve, by applying an alkaline earth metal cation and an organic compound having at least one group capable of forming a chelate to appropriate acicular iron oxides and then reducing the treated oxides.
摘要翻译： 通过将碱土金属阳离子和具有至少一个能够形成螯合基团的有机化合物施加到适当的针状物上，制造含铁的针状铁磁性金属颜料的方法，其具有降低的场强分布和更陡的剩余磁化曲线 氧化铁，然后还原经处理的氧化物。
-
4.发明授权Manufacture of ferromagnetic, acicular metallic iron particles by hydrogen reduction 失效通过氢还原制造铁磁，针状金属铁颗粒
公开(公告)号：US4050962A
公开(公告)日：1977-09-27
申请号：US595562
申请日：1975-07-14
CPC分类号： C09C1/62 , H01F1/065 , C01P2002/52 , C01P2006/42
摘要： A process for the manufacture of acicular ferromagnetic metal pigments containing iron, having a reduced field strength distribution and a steeper residual magnetization curve, by applying equivalent amounts of an alkaline earth metal cation and of a monobasic, dibasic or tribasic aliphatic carboxylic acid of up to 6 carbon atoms onto appropriate acicular iron oxides and then reducing the treated oxides.
摘要翻译： 通过施加等量的碱土金属阳离子和一元，二元或三元脂肪族羧酸，制造含铁的针状铁磁性金属颜料的方法，具有降低的场强分布和更陡的剩余磁化曲线 6个碳原子转移到合适的针状铁氧化物上，然后还原经处理的氧化物。
-
公开(公告)号：US4073977A
公开(公告)日：1978-02-14
申请号：US691227
申请日：1976-06-01
CPC分类号： B22F1/0059 , H01F1/061
摘要： A method of stabilizing pyrophoric metal powders by treating the metal powders with alkylene oxides to form a polymer coating on the metal particles.
摘要翻译： 一种通过用氧化烯处理金属粉末以在金属颗粒上形成聚合物涂层来稳定发火金属粉末的方法。
-
公开(公告)号：US3961990A
公开(公告)日：1976-06-08
申请号：US535578
申请日：1974-12-23
申请人： Eberhard Koester , Gerd Wunsch , Paul Deigner , Karl Uhl , Werner Stumpfi , Werner Steck
发明人： Eberhard Koester , Gerd Wunsch , Paul Deigner , Karl Uhl , Werner Stumpfi , Werner Steck
CPC分类号： C04B35/2666 , H01F1/0009 , H01F1/04 , H01F1/09 , H01F1/12
摘要： A process for the manufacture of magnetic materials containing a phase A with a ferromagnetic spin system, of composition Co.sub.x Ni.sub.1.sub.-x and a phase B with an antiferromagnetic spin system of composition (CoO).sub.x (NiO).sub.1.sub.-x , with values of x from 0.05 to 0.96, the phases A and B showing exchange interaction. The materials are manufactured by surface oxidation of starting materials having a ferromagnetic layer, at least on the surface but optionally extending deeper, of composition A, to produce the antiferromagnetic phase B, nitrous oxide being used as the oxidant. Magnetic materials thus obtained have an asymmetrical hysteresis loop, which manifests itself at different temperatures, namely the particular Neel temperature of the phase B, which depends on the composition of the phases which varies in accordance with the values of x.
-
7.发明授权Magnetic materials with exchange anisotropy and process for their manufacture 失效具有交换各向异性的磁性材料及其制造方法
公开(公告)号：US3959032A
公开(公告)日：1976-05-25
申请号：US535577
申请日：1974-12-23
申请人： Eberhard Koester , Gerd Wunsch , Paul Deigner , Dieter Graw , Karl Uhl , Werner Steck
发明人： Eberhard Koester , Gerd Wunsch , Paul Deigner , Dieter Graw , Karl Uhl , Werner Steck
CPC分类号： H01F1/09 , G11B5/70621 , H01F1/0009
摘要： Magnetic materials which essentially consist of a phase A with a ferromagnetic spin system and a phase B with an anti-ferromagnetic spin system, phases A and B interacting by exchange coupling, and the manufacture of such materials. The materials consist essentially of two-phase magnetic single-domain particles, with the alloy [Co.sub.x Ni.sub.1.sub.-x ] as the ferromagnetic phase A and its oxidized form [(CoO).sub.x (NiO).sub.1.sub.-x ] as the anti-ferromagnetic phase B, with values of x of 0.04 to 0.96. They are manufactured by surface oxidation of a pigment layer, which at least covers the surface but may extend deeper, having the composition of phase A, to form an oxide layer, at least 40 A thick, of the phase B, followed by heating in an inert gas atmosphere, or by reduction of a corresponding layer of phase B to a layer of phase A. Magnetic single-domain particles of this composition have a Neel temperature which varies with X. As a result, materials are obtained which have an asymmetrical hysteresis loop, attributable to exchange anisotropy, at temperatures which can be varied within wide limits in accordance with the intended use of the material.
摘要翻译： 磁性材料基本上由具有铁磁自旋系统的相A和具有反铁磁旋转系统的相B组成，A相和B相通过交换耦合相互作用，并且制造这种材料。 这些材料基本上由两相磁性单畴粒子组成，合金[CoxNi1-x]作为铁磁相A，其氧化形式[（CoO）x（NiO）1-x]作为反铁磁相B ，值x为0.04至0.96。 它们通过颜料层的表面氧化制造，颜料层至少覆盖表面但可以延伸得更深，具有相A的组成，以形成相B的至少40μA的氧化物层，随后加热 惰性气体气氛，或通过将相B的相应层减少到相A层。该组合物的磁性单畴颗粒具有随X变化的Neel温度。结果，获得具有不对称性的材料 可归因于交换各向异性的磁滞回线，其温度可以根据材料的预期用途在宽范围内变化。
-
公开(公告)号：US4272563A
公开(公告)日：1981-06-09
申请号：US765159
申请日：1977-02-03
申请人： Werner Steck , Werner Loeser , Manfred Steuerwald , Gerd Wunsch , Paul Deigner
发明人： Werner Steck , Werner Loeser , Manfred Steuerwald , Gerd Wunsch , Paul Deigner
摘要： A process for the manufacture of wear-resistant magnetic recording media comprising a dimensionally stable base, a thin ferromagnetic metal layer, containing cobalt and/or nickel, firmly bonded thereto and a thin protective layer applied thereon. The protective layer is produced by treating the recording medium in a liquid basic medium, containing gaseous oxygen, for from 1 to 60 minutes at from 5.degree. to 70.degree. C., washing and drying the treated recording medium and then heating it in air at from 170.degree. to 300.degree. C. This method offers a particularly simple way of providing the ferromagnetic layer of the recording medium with a thin but uniform, mechanically stable and wear-resistant protective layer.
摘要翻译： 一种用于制造耐磨磁记录介质的方法，其包括尺寸稳定的基底，与包含钴和/或镍的薄的铁磁金属层，其牢固地结合到其上并施加有薄的保护层。 保护层通过在含有气态氧的液体碱性介质中在5至70℃下处理记录介质1至60分钟来制备，洗涤和干燥经处理的记录介质，然后在空气中加热 从170℃到300℃。该方法提供了一种特别简单的方式来提供记录介质的铁磁层，其具有薄而均匀的机械稳定且耐磨的保护层。
-
9.发明授权Rechargeable accumulator having a manganese dioxide electrode and an acid electrolyte 失效具有二氧化锰电极和酸性电解质的可充电蓄电池
公开(公告)号：US4096318A
公开(公告)日：1978-06-20
申请号：US787522
申请日：1977-04-14
申请人： Rolf Wurmb , Fritz Beck , Gerd Wunsch , Klaus Boehlke , Wolfram Treptow
发明人： Rolf Wurmb , Fritz Beck , Gerd Wunsch , Klaus Boehlke , Wolfram Treptow
摘要： An accumulator having an acid electrolyte and possessing two electrodes of the first kind mounted on base electrodes. The active material on the positive side contains manganese dioxide. The base electrode on the negative side consists of powdered graphite embedded in a binder which is resistant to the electrolyte. The base electrode on the positive side has a coarse porous structure and consists of graphite or titanium coated with titanium nitride or titanium carbide. The average pore diameters are from 0.1 to 2 mm and the pore volume is from 20 to 70%.
摘要翻译： 具有酸性电解质并且具有安装在基极上的第一种电极的蓄电池。 正极侧的活性物质含有二氧化锰。 负极侧的基极由嵌入粘合剂中的粉末状石墨组成，其耐电解质。 正极侧的基极具有粗大的多孔结构，由涂覆有氮化钛或碳化钛的石墨或钛组成。 平均孔径为0.1〜2mm，孔体积为20〜70％。
-
公开(公告)号：US4060476A
公开(公告)日：1977-11-29
申请号：US640575
申请日：1975-12-15
申请人： Wolfram Treptow , Gerd Wunsch
发明人： Wolfram Treptow , Gerd Wunsch
CPC分类号： C25B11/16
摘要： An anode for electrochemical processes consists of an electrode base plate of a metal which can be passivated electrochemically, a protective layer deposited thereon, and a further layer, consisting of manganese dioxide. The protective layer consists of the nitride of the metal of the electrode base plate.
摘要翻译： 用于电化学过程的阳极由可以电化学钝化的金属的电极基板，沉积在其上的保护层和由二氧化锰组成的另一层组成。 保护层由电极基板的金属的氮化物构成。
-
-
-
-
-
-
-
-
-
搜索结果
23 条记录 (耗时 0.02 秒)