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1. 发明授权

US06503560B2 Composite nickel fine powder and method for preparing the same 有权
公开(公告)号：US06503560B2
公开(公告)日：2003-01-07
申请号：US09944164
申请日：2001-09-04
申请人： Yoshiharu Toshima , Takayuki Araki , Yasuhide Yamaguchi , Takao Hayashi , Hiroyuki Shimamura
发明人： Yoshiharu Toshima , Takayuki Araki , Yasuhide Yamaguchi , Takao Hayashi , Hiroyuki Shimamura
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.

2. 发明授权

US06939390B2 Nickel powder, method for preparing the same and paste for use in making electrodes for electronic parts 失效
标题翻译：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
申请人： Yoshiharu Toshima , Takao Hayashi , Yasuhide Yamaguchi , Hiroyuki Shimamura
发明人： Yoshiharu Toshima , Takao Hayashi , Yasuhide Yamaguchi , Hiroyuki Shimamura
IPC分类号： B22F9/24 , B22F1/00 , B22F1/02 , H01B1/00 , H01B1/02 , H01B1/22 , H01G4/008
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。

3. 发明授权

US06632524B1 Nickel powder, method for preparing the same and paste for use in making electrodes for electronic parts 有权
标题翻译：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
申请人： Yoshiharu Toshima , Takao Hayashi , Yasuhide Yamaguchi , Hiroyuki Shimamura
发明人： Yoshiharu Toshima , Takao Hayashi , Yasuhide Yamaguchi , Hiroyuki Shimamura
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。

4. 发明授权

US06228141B1 Nickel fine powder and method for preparing the same 失效
标题翻译：镍粉及其制备方法
公开(公告)号：US06228141B1
公开(公告)日：2001-05-08
申请号：US09559488
申请日：2000-04-27
申请人： Takayuki Araki , Yoshiharu Toshima , Yasuhide Yamaguchi , Takao Hayashi
发明人： Takayuki Araki , Yoshiharu Toshima , Yasuhide Yamaguchi , Takao Hayashi
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。

5. 发明授权

US06162277A Nickel fine powder and method for preparing the same 有权
标题翻译：镍粉及其制备方法
公开(公告)号：US06162277A
公开(公告)日：2000-12-19
申请号：US240629
申请日：1999-02-01
申请人： Yoshiharu Toshima , Takayuki Araki , Takao Hayashi , Hiroyuki Shimamura
发明人： Yoshiharu Toshima , Takayuki Araki , Takao Hayashi , Hiroyuki Shimamura
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。

6. 发明授权

US6120576A Method for preparing nickel fine powder 失效
标题翻译：镍微粉制备方法
公开(公告)号：US6120576A
公开(公告)日：2000-09-19
申请号：US112361
申请日：1998-07-09
申请人： Yoshiharu Toshima , Takayuki Araki , Takao Hayashi , Hiroyuki Shimamura
发明人： Yoshiharu Toshima , Takayuki Araki , Takao Hayashi , Hiroyuki Shimamura
IPC分类号： B22F1/00 , B22F9/24
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。

7. 发明授权

US06312622B1 Composite nickel fine powder 有权
标题翻译：复合镍细粉
公开(公告)号：US06312622B1
公开(公告)日：2001-11-06
申请号：US09699449
申请日：2000-10-31
申请人： Yoshiharu Toshima , Takayuki Araki , Yasuhide Yamaguchi
发明人： Yoshiharu Toshima , Takayuki Araki , Yasuhide Yamaguchi
IPC分类号： H01B102
CPC分类号： H01G4/0085 , B22F1/02 , H01B1/02 , Y10T428/2991
摘要： Composite nickel fine powder comprises metal nickel fine particles, at least one member attached to the surface of the fine particles and selected from the group consisting of oxides and double oxides containing at least one metal element selected from the group consisting of the Groups 2 to 14 of the Periodic Table and whose atomic number falls within the range of from 12 to 82, and a saturated or unsaturated fatty acid supported on the surface of the nickel fine particles provided thereon with the oxide and/or double oxide attached thereto. The composite nickel fine powder is excellent in resistance to heat shrinkage, has a high tap density, and has characteristic properties suitable for use as a material for making a conductive paste.
摘要翻译：复合镍微粉末包含金属镍微粒，至少一个与微粒表面相连并且选自氧化物和二氧化物的组分，所述氧化物和双氧化物含有至少一种选自第2组至第14组的金属元素的元素，其原子序数在12〜82的范围内，饱和或不饱和的脂肪酸负载在其上附着有氧化物和/或双氧化物的镍微粒表面上。复合镍微粉末的耐热收缩性优异，具有高的振实密度，并且具有适用于制造导电浆料的特性。

8. 发明授权

US06632265B1 Nickel powder, method for preparation thereof and conductive paste 有权
标题翻译：镍粉，其制备方法和导电膏
公开(公告)号：US06632265B1
公开(公告)日：2003-10-14
申请号：US09869970
申请日：2001-10-09
申请人： Takashi Mukuno , Takayuki Araki , Yoshiharu Toshima
发明人： Takashi Mukuno , Takayuki Araki , Yoshiharu Toshima
IPC分类号： C22B2300
CPC分类号： H01G4/0085 , B22F1/0014 , B22F9/24
摘要： The nickel powder is characterized in that the rate of the nickel particles whose particle size is not less than 1.2 time the average particle size as determined by the observation with an SEM is not more than 5% of the total number of nickel particles and that the rate of nickel particles whose particle size is not more than 0.8 time the average particle size is not more than 5% of the total number of nickel particles. The nickel powder is produced by bringing a slurry, containing nickel hydroxide, which is prepared by adding an aqueous solution of a nickel salt to an aqueous solution of an alkali metal hydroxide, into contact with a hydrazine reducing agent under the temperature conditions of not less than 55° C. to reduce the nickel hydroxide.
摘要翻译：镍粉的特征在于，通过用SEM观察确定的粒径不小于平均粒径的1.2倍的镍粒子的速度不超过镍粒子总数的5％，并且粒径不超过平均粒径的0.8倍的镍粒子的速率不超过镍粒子总数的5％。通过将含有镍盐的水溶液加入到碱金属氢氧化物的水溶液中而制备的含有氢氧化镍的浆料与肼还原剂接触，在不低于比55℃还原氢氧化镍

9. 发明授权

US06494931B1 Nickel powder and conductive paste 有权
标题翻译：镍粉和导电胶
公开(公告)号：US06494931B1
公开(公告)日：2002-12-17
申请号：US09889149
申请日：2001-10-17
申请人： Takashi Mukuno , Takayuki Araki , Yoshiharu Toshima
发明人： Takashi Mukuno , Takayuki Araki , Yoshiharu Toshima
IPC分类号： B22F100
CPC分类号： H01G4/0085 , B22F1/0014 , B22F1/0044 , B22F9/24
摘要： The present invention relates to nickel powder characterized in that the rate of the nickel particles whose particle size is not less than 1.2 time the average particle size as determined by the observation with an SEM is not more than 5% of the total number of nickel particles, that the rate of nickel particles whose particle size is not more than 0.8 time the average particle size is not more than 5% of the total number of nickel particles and that the tap density of the nickel powder is not less than 2.5 g/cm3, as well as a conductive paste for use in making a multilayer ceramic capacitor. The nickel powder of the present invention has a narrow particle size distribution and an excellent packing ability in a conductive paste and is particularly suitably used for forming a thin and uniform inner electrode for a multilayer ceramic capacitor, without being accompanied by the formation of any crack and/or the generation of any delamination.
摘要翻译：本发明涉及镍粉，其特征在于，通过用SEM观察确定的粒径不小于平均粒径的1.2倍的镍粒子的速率不超过镍粒子总数的5％粒径不大于平均粒径的0.8倍的镍粒子的速率不超过镍粒子总数的5％，并且镍粉的振实密度不小于2.5g / cm 3 ，以及用于制造多层陶瓷电容器的导电浆料。本发明的镍粉末具有窄的粒度分布和在导电浆料中的优异的填充能力，特别适用于形成薄且均匀的多层陶瓷电容器的内部电极，而不伴随任何裂纹的形成和/或产生任何分层。

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