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公开(公告)号：US06503560B2
公开(公告)日：2003-01-07
申请号：US09944164
申请日：2001-09-04
IPC分类号： B05D700
CPC分类号： H01G4/0085 , B22F1/0096 , B22F1/02 , B22F2999/00 , C22C1/1084 , Y10T428/2991 , B22F9/04
摘要： The composite nickel fine powder includes surface-oxidized nickel fine particles and at least one member selected from the group consisting of oxides and complex oxides of at least one metal element having an atomic number ranging from 12 to 56 or 82 and belonging to Group 2 to 14 of the Periodic Table on the surface of the surface-oxidized nickel fine particles.
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2.发明授权Nickel powder, method for preparing the same and paste for use in making electrodes for electronic parts 失效镍粉，其制备方法和用于制造电子部件用电极的糊剂公开(公告)号：US06939390B2
公开(公告)日：2005-09-06
申请号：US10609566
申请日：2003-07-01
CPC分类号： H01G4/0085 , H01B1/02 , H01B1/22 , Y10T428/29 , Y10T428/2982 , Y10T428/2991
摘要： Nickel powder includes, on the basis of the total number of particles, not less than 10% of particles whose particle size is not less than 1.2 times the average particle size, as determined by the SEM observation; and not less than 10% of particles whose particle size is not more than 0.8 times the average particle size, as determined by the SEM observation. The nickel powder can be prepared by, for instance, precipitating nickel particles from an aqueous solution containing a nickel salt and a hydrazine reducing agent, without forming any hydroxide of nickel as an intermediate. A conductive paste containing the nickel powder can be applied onto an internal or external electrode for electronic parts.
摘要翻译： 根据SEM观察，镍粉末基于粒子总数不少于粒径不小于平均粒径的1.2倍的粒子的10％; 和通过SEM观察确定的粒径不大于平均粒径的0.8倍的粒子的不少于10％。 镍粉可以通过例如从包含镍盐和肼还原剂的水溶液中沉淀镍颗粒而不形成任何镍的氢氧化物作为中间体来制备。 可以将含有镍粉末的导电膏施加到用于电子部件的内部或外部电极上。
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公开(公告)号：US06228141B1
公开(公告)日：2001-05-08
申请号：US09559488
申请日：2000-04-27
IPC分类号： B22F100
CPC分类号： H01G4/0085 , B22F9/24 , C22B23/0461 , C22C1/0433
摘要： Nickel fine powder comprises nickel and phosphorus dispersed in the nickel in an amount ranging from 0.01 to 2% by weight on the basis of the weight of the nickel and having a particle size of not more than 0.5 &mgr;m. The nickel fine powder can be prepared by a method comprising the step of reducing nickel hydroxide in the presence of phosphorus ions in such an amount that the molar ratio of phosphorus ions to nickel ions falls within the range of from 0.01 to 2.
摘要翻译： 镍精细粉末包含分散在镍中的镍和磷，其量为基于镍的重量为0.01至2重量％，并且具有不大于0.5μm的粒径。 镍微粉末可以通过包括在磷离子存在下还原氢氧化镍的方法制备，其量使得磷离子与镍离子的摩尔比在0.01至2的范围内。
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4.发明授权Nickel powder, method for preparing the same and paste for use in making electrodes for electronic parts 有权镍粉，其制备方法和用于制造电子部件用电极的糊剂公开(公告)号：US06632524B1
公开(公告)日：2003-10-14
申请号：US09716238
申请日：2000-11-21
IPC分类号： B32B1502
CPC分类号： H01G4/0085 , H01B1/02 , H01B1/22 , Y10T428/29 , Y10T428/2982 , Y10T428/2991
摘要： Nickel powder comprises, on the basis of the total number of particles, not less than 10% of particles whose particle size is not less than 1.2 time the average particle size, as determined by the SEM observation; and not less than 10% of particles whose particle size is not more than 0.8 time the average particle size, as determined by the SEM observation. The nickel powder can be prepared by, for instance, precipitating nickel particles from an aqueous solution containing a nickel salt and a hydrazine reducing agent, without forming any hydroxide of nickel as an intermediate. A conductive paste containing the nickel powder can be applied onto the positions on which an internal or external electrode for electronic parts and then baking the coated paste to give an electrode.
摘要翻译： 根据SEM观察，镍粉基于粒子总数不少于粒径不小于1.2倍平均粒度的粒子的10％; 和通过SEM观察确定的粒径不大于平均粒径的0.8倍的粒子的不少于10％。 镍粉可以通过例如从含有镍盐和肼还原剂的水溶液中沉淀镍颗粒而不形成任何镍的氢氧化物作为中间体来制备。 施加到用于电子部件的内部或外部电极的位置上，然后烘烤涂覆的糊料以产生电极。
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公开(公告)号：US6120576A
公开(公告)日：2000-09-19
申请号：US112361
申请日：1998-07-09
CPC分类号： C22B23/0453 , B22F1/0014 , B22F9/24 , B22F2998/00
摘要： A method for preparing nickel fine powder is herein disclosed, which comprises the steps of mixing an aqueous sodium hydroxide solution comprising, on the basis of the total weight of the sodium hydroxide present in the aqueous solution, 75 to 85% by weight of liquid caustic soda as specified in JIS K 1203 and 25 to 15% by weight, in total, of at least one of sodium hydroxide as specified in JIS K 8576 and solid caustic soda as specified in JIS K 1202, with an aqueous solution of nickel sulfate to form nickel hydroxide, then reducing the resulting nickel hydroxide with hydrazine and recovering nickel fine powder produced. The nickel fine powder prepared by the method has an average particle size of the primary particles ranging from 0.1 to 0.9 .mu.m, a D.sub.90 value of not more than 2.1 .mu.m and a tap density of not less than 3.5 g/cc. The nickel fine powder has a low degree of aggregation, a narrow particle size distribution and a high tap density and therefore, the powder is quite suitably used as a material for producing an internal electrode for a laminated ceramic condenser.
摘要翻译： 本文公开了一种制备镍微粉的方法，其包括以下步骤：将氢氧化钠水溶液混合，所述氢氧化钠水溶液基于存在于水溶液中的氢氧化钠的总重量为75至85重量％的液体苛性碱 按照JIS K 1203中规定的苏打水，以及JIS-8576中规定的氢氧化钠中的至少一种和JIS K 1202中规定的固体苛性钠中的至少一种的25〜15重量％的硫酸镍水溶液 形成氢氧化镍，然后用肼还原所得的氢氧化镍并回收生产的镍细粉。 通过该方法制备的镍微粉末，其一次粒子的平均粒径为0.1〜0.9μm，D90值不大于2.1μm，振实密度为3.5g / cc以上。 镍微粉末具有低聚集度，窄粒度分布和高振实密度，因此该粉末非常适合用作制备用于层压陶瓷冷凝器的内部电极的材料。
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公开(公告)号：US06162277A
公开(公告)日：2000-12-19
申请号：US240629
申请日：1999-02-01
IPC分类号： C01G53/00 , B22F1/00 , B22F5/00 , B22F9/24 , C22B3/44 , C22B5/00 , C22B23/00 , C22C1/04 , C22C19/00 , H01G4/008 , H01G4/12 , B22F9/00
CPC分类号： H01G4/0085 , B22F9/24 , C22C1/0433
摘要： A nickel fine powder includes 0.02 to 1.0% by weight of magnesium and/or 0.02 to 0.1% by weight of calcium dispersed in the nickel. A method for preparing the nickel fine powder includes the steps of forming nickel hydroxide by mixing an aqueous solution containing a magnesium salt and/or a calcium salt and a nickel salt with an aqueous solution of sodium hydroxide and then reducing the hydroxide with a hydrazine reducing agent. The nickel fine powder has thermal shrinkage characteristics very close to those observed for ceramic substrates and is accordingly suitable as a material for producing an internal electrode for laminated ceramic condensers.
摘要翻译： 镍微粉末包含0.02〜1.0重量％的镁和/或0.02〜0.1重量％的分散在镍中的钙。 制备镍微粉的方法包括以下步骤：通过将含有镁盐和/或钙盐和镍盐的水溶液与氢氧化钠水溶液混合形成氢氧化镍，然后用还原肼还原氢氧化物 代理商 镍微粉末的热收缩特性与陶瓷基板的热收缩特性非常接近，因此适合作为层叠陶瓷电容器的内部电极的制造用材料。
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公开(公告)号：US06406513B2
公开(公告)日：2002-06-18
申请号：US09773908
申请日：2001-02-02
申请人： Yasuhide Yamaguchi , Takao Hayashi
发明人： Yasuhide Yamaguchi , Takao Hayashi
IPC分类号： B22F100
CPC分类号： H01G4/0085 , B22F1/0007 , B22F1/0044 , B22F9/24
摘要： Nickel powder herein disclosed has an average particle size, as determined by the observation with SEM, of not more than 1 &mgr;m, a particle density of not less than 8.0 g/cm3, and an average diameter of crystallites present in the nickel particles of not more than 550 Å. Moreover, a conductive paste for a multilayer ceramic capacitor comprises the foregoing nickel powder. The nickel powder and the conductive paste containing the same can control heat shrinkage while inhibiting any rapid oxidation and permit the production of a thin, uniform internal electrode for a multilayer ceramic capacitor without being accompanied by any crack formation and delamination during firing.
摘要翻译： 本文公开的镍粉具有通过SEM观察确定的不超过1μm的平均粒度，不小于8.0g / cm 3的颗粒密度和不存在于镍颗粒中的微晶的平均直径 超过550Å。 此外，用于多层陶瓷电容器的导电浆料包括上述镍粉末。 镍粉末和含有它们的导电糊剂可以控制热收缩同时抑制任何快速氧化，并允许生产用于多层陶瓷电容器的薄且均匀的内部电极，而不伴随着烧制期间的任何裂纹形成和分层。
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公开(公告)号：US06517745B2
公开(公告)日：2003-02-11
申请号：US09793133
申请日：2001-02-27
申请人： Takao Hayashi , Yasuhide Yamaguchi
发明人： Takao Hayashi , Yasuhide Yamaguchi
IPC分类号： H01B102
CPC分类号： H01G4/0085 , B22F1/0014 , B22F9/24 , B22F9/28 , Y10T428/24917
摘要： Nickel powder herein disclosed is characterized in that it has an average particle size as determined through the observation by a scanning electron microscope (SEM) ranges from 0.1 to 1 &mgr;m and that the D5 0 value as determined by laser diffraction-scattering particle size distribution analysis and the average particle size as determined by SEM observation satisfy the following relation represented by Formula (1): 1≦[(D5 0 value)/(average particle size as determined by SEM observation)]≦1.8 (1) The nickel powder is highly dispersible in an organic vehicle during the preparation of a conductive paste because it has low agglomerate properties and it is in an approximately monodispersed condition and the nickel powder is particularly suitable in the preparation of a conductive paste for use in making a thin internal electrode of a multilayer ceramic capacitor, which is free of any projection, because of it sharp particle distribution.
摘要翻译： 本文公开的镍粉的特征在于，其具有通过扫描电子显微镜（SEM）观察确定的平均粒径为0.1至1μm，并且通过激光衍射 - 散射粒度分布分析测定的D5 0值 通过SEM观察确定的平均粒径满足式（1）所示的关系：由于导电性糊剂的凝聚性低，因此在有机载体中高度分散，因此， 单分散状态和镍粉特别适用于制备导电浆料，用于制造多层陶瓷电容器的薄内部电极，其由于其尖锐的颗粒分布而没有任何突出。
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公开(公告)号：US06391087B1
公开(公告)日：2002-05-21
申请号：US09714198
申请日：2000-11-17
IPC分类号： B22F924
CPC分类号： B22F9/24 , B22F1/0011 , H05K1/095
摘要： Copper fine powder has an electrical resistance in its powdery state of not more than 1×10−3 &OHgr;·cm; a BET specific surface area ranging from 0.15 to 0.3 m2/g; a tap density of not less than 4.5 g/cc; a product of the tap density and the particle size, of not less than 13, the particle size being calculated from the specific surface area and; a particle size distribution observed in the microtrack measurement as expressed in terms of D50 and D90 ranging from 4 to 7 &mgr;m and 9 to 11 &mgr;m, respectively; and a weight loss through hydrogen-reduction of not more than 0.30%. The copper fine powder is prepared by adding an alkali hydroxide to an aqueous copper salt solution containing divalent copper ions maintained at not less than 55° C. in an amount of not less than the chemical equivalent to form cupric oxide; then gradually adding a reducing sugar to the reaction system while maintaining the temperature of the system to not less than 55° C. to reduce the cupric oxide to cuprous oxide; followed by filtration and washing, re-suspension to form a slurry, gradual addition of a hydrazine reducing agent to the slurry in the presence of a pH buffer capable of maintaining the pH to 5.5 to 8.5 to thus reduce the cuprous oxide to metal copper.
摘要翻译： 铜精细粉末的电阻在其粉末状态不超过1×10-3欧米加•厘米; BET比表面积为0.15〜0.3m2 / g; 振实密度不小于4.5g / cc; 振实密度和粒径的乘积不小于13，粒径由比表面积计算; 在微轨迹测量中观察到的粒度分布如D50和D90所示，分别为4至7μm和9至11μm; 并且通过氢还原的重量减少不大于0.30％。 通过向不低于55℃的含有二价铜离子的铜盐水溶液中加入碱金属氢氧化物，其量不小于形成氧化铜的化学当量; 然后逐渐向反应体系中加入还原糖，同时将体系温度保持在不低于55℃，将氧化铜还原为氧化亚铜; 然后过滤和洗涤，再悬浮以形成浆料，在能够将pH维持在5.5至8.5的pH缓冲剂存在下，向该浆液中逐渐加入肼还原剂，从而将氧化亚铜还原成金属铜。
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公开(公告)号：US06174344B1
公开(公告)日：2001-01-16
申请号：US09088490
申请日：1998-06-02
IPC分类号： C22C900
CPC分类号： B22F9/24 , B22F1/0011 , H05K1/095
摘要： Copper fine powder has an electrical resistance in its powdery state of not more than 1×10−3&OHgr;.cm; a BET specific surface area ranging from 0.15 to 0.3 m2/g; a tap density of not less than 4.5 g/cc; a product of the tap density and the particle size, of not less than 13, the particle size being calculated from the specific surface area and a particle size distribution observed in the microtrack measurement as expressed in terms of D50 and D90 ranging from 4 to 7 &mgr;m and 9 to 11 &mgr;m, respectively; and a weight loss through hydrogen-reduction of not more than 0.30%. The copper fine powder is prepared by adding an alkali hydroxide to an aqueous copper salt solution containing divalent copper ions maintained at not less than 55° C. in an amount of not less than the chemical equivalent to form cupric oxide; then gradually adding a reducing sugar to the reaction system while maintaining the temperature of the system to not less than 55° C. to reduce the cupric oxide to cuprous oxide; followed by filtration and washing, re-suspension to form a slurry, gradual addition of a hydrazine reducing agent to the slurry in the presence of a pH buffer capable of maintaining the pH to 5.5 to 8.5 to thus reduce the cuprous oxide to metal copper.
摘要翻译： 铜细粉末的电阻在其粉末状态不超过1×10-3OMEGA.cm; BET比表面积为0.15〜0.3m2 / g; 振实密度不小于4.5g / cc; 振实密度和颗粒尺寸的产品不小于13，粒径由比表面积计算，并且在微曲线测量中观察到的粒度分布以D50和D90表示，范围为4至7 妈妈和9至11岁妈妈分别; 并且通过氢还原的重量减少不大于0.30％。 通过向不低于55℃的含有二价铜离子的铜盐水溶液中加入碱金属氢氧化物，其量不小于形成氧化铜的化学当量; 然后逐渐向反应体系中加入还原糖，同时将体系温度保持在不低于55℃，将氧化铜还原为氧化亚铜; 然后过滤和洗涤，再悬浮以形成浆料，在能够将pH维持在5.5至8.5的pH缓冲剂存在下，向该浆液中逐渐加入肼还原剂，从而将氧化亚铜还原成金属铜。
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