公开(公告)号：US06168752A

公开(公告)日：2001-01-02

申请号：US09117509

申请日：1998-07-31

申请人： Wataru Kagohashi ,  Takefumi Irie ,  Hideo Takatori

发明人： Wataru Kagohashi ,  Takefumi Irie ,  Hideo Takatori

IPC分类号： B22F922

CPC分类号： B22F9/28 ,  B22F2998/00 ,  B22F2999/00 ,  Y10S266/905 ,  B22F1/0018 ,  B22F2201/013

摘要： A process for producing metallic powders a chlorination step for continuously producing chloride gas of metal by reacting metal with chlorine gas, and a reduction step for continuously reducing the metallic chloride gas by reacting the metallic chloride gas produced in the chlorination step with reducing gas. Regulating the feed rate of the chlorine gas can control the feed rate of the metallic chloride gas, whereby the particle diameters of produced metal powders can be stably controlled. Thus, the invention can make the particle diameters stable and arbitrarily control the diameters in the range of 0.1 to 1.0 &mgr;m.

摘要翻译： 一种金属粉末的制造方法，其特征在于，使金属与氯气反应生成氯化物气体的氯化气体的氯化工序，以及通过使氯化工序生成的氯化金属气体与还原气体反应而连续还原金属氯化物气体的还原工序。 调节氯气的进料速率可以控制金属氯化物气体的进料速率，从而可以稳定地控制所生产的金属粉末的粒径。 因此，本发明可使粒径稳定且任意地控制直径在0.1〜1.0μm的范围内。

公开(公告)号：US06372015B1

公开(公告)日：2002-04-16

申请号：US09463563

申请日：2000-01-27

申请人： Tsuyoshi Asai ,  Hideo Takatori ,  Wataru Kagohashi

发明人： Tsuyoshi Asai ,  Hideo Takatori ,  Wataru Kagohashi

IPC分类号： B22F912

CPC分类号： B22F9/28

摘要： A process for production of metallic powder comprising contacting a metallic chloride gas with a reductive gas in a temperature range for a reducing reaction to form a metallic powder and subsequently contacting the metallic powder with an inert gas such as nitrogen gas to cool the powder, wherein the rate of cooling is 30° C. or more for temperatures from the temperature range for the reducing reaction to a temperature of 800°C. or less. The metallic powder is rapidly cooled, which results in suppression of agglomeration of particles in the metallic powder and the growth of secondary particles. Growth of particles of a metallic powder formed in a reduction process into secondary particles through agglomeration after the reduction process is suppressed, and a ultrafine metallic powder having a particle diameter of, for example, 1&mgr;m or less, can be reliably produced.

摘要翻译： 一种金属粉末的制造方法，其特征在于，在还原反应的温度范围内使金属氯化物气体与还原性气体接触，形成金属粉末，随后使金属粉末与氮气等惰性气体接触，使粉末冷却， 对于从还原反应的温度范围到800℃的温度的温度，冷却速率为30℃以上。 或更少。 金属粉末被快速冷却，这导致抑制金属粉末中的颗粒附聚和二次颗粒的生长。 在还原处理后，通过还原过程中的附聚将在还原过程中形成的金属粉末的颗粒生长成二次颗粒，并且可以可靠地制造具有例如1μm或更小的粒径的超细金属粉末。

公开(公告)号：US06235077B1

公开(公告)日：2001-05-22

申请号：US09381312

申请日：1999-10-12

申请人： Wataru Kagohashi ,  Tsuyoshi Asai ,  Hideo Takatori

发明人： Wataru Kagohashi ,  Tsuyoshi Asai ,  Hideo Takatori

IPC分类号： B22F928

CPC分类号： B22F9/28 ,  B22F2998/00 ,  B22F2999/00 ,  B22F1/0018 ,  B22F2201/013 ,  B22F2201/00

摘要： Chlorine gas from a supply nozzle is mixed with the vapor of nickel chloride and the mixed gas is supplied from a supply nozzle into a hydrogen gas atmosphere in a reduction reactor at a reduction temperature of 900 to 1100° C. The volume of chlorine gas to be mixed versus the vapor of nickel chloride is adjusted to a ratio of 0.01 to 0.5 moles per mole of the vapor of nickel chloride. The particle size of the nickel powder can be controlled appropriately, and also, uniformity of particle size, smoothability of surfaces of particles, and sphericity can be improved.

摘要翻译： 来自供给喷嘴的氯气与氯化镍的蒸汽混合，混合气体在还原反应器中在900〜1100℃的还原温度下从供给喷嘴供给氢气气氛。氯气体积 与氯化镍的蒸气相混合，调节成每摩尔氯化镍蒸汽为0.01〜0.5摩尔的比例。 可以适当地控制镍粉的粒径，并且可以提高粒径的均匀性，颗粒表面的光滑性和球形度。

公开(公告)号：US20050217428A1

公开(公告)日：2005-10-06

申请号：US10515952

申请日：2003-05-19

申请人： Wataru Kagohashi ,  Takuya Miyagi

发明人： Wataru Kagohashi ,  Takuya Miyagi

IPC分类号： B22F9/28 ,  C22B34/12 ,  H01G4/30 ,  B22F9/22

CPC分类号： C22B34/1286 ,  B22F9/28 ,  B22F2999/00 ,  C22B34/1209 ,  B22F2201/013

摘要： Raw metal is intermittently and continuously charged into a chlorination furnace, the raw metal and chlorine gas are reacted in the chlorination furnace to continuously generate metal chloride vapor, and the metal chloride vapor and hydrogen gas are reacted in a reduction furnace to continuously obtain metallic powder. Furthermore, the chlorination furnace in which the chlorination reaction is proceeding is weighed, and the charged amount of the raw metal to the chlorination furnace is controlled depending on the weighing result.

摘要翻译： 将原料金属间歇连续地装入氯化炉中，使原料金属和氯气在氯化炉中反应，连续生成金属氯化物蒸汽，并在还原炉中使金属氯化物蒸气和氢气反应，从而连续获得金属粉末 。 此外，称量进行氯化反应的氯化炉，根据称量结果控制向氯化炉的原料的加入量。

公开(公告)号：US20120261269A1

公开(公告)日：2012-10-18

申请号：US13518395

申请日：2010-12-22

申请人： Wataru Kagohashi ,  Matsuhide Horikawa ,  Kohsuke Kakiuchi

发明人： Wataru Kagohashi ,  Matsuhide Horikawa ,  Kohsuke Kakiuchi

IPC分类号： C01B33/023 ,  C01B33/08 ,  C25C3/02 ,  C25C3/06 ,  C25C3/34

CPC分类号： C01B33/025 ,  C01B33/033 ,  C01B33/035 ,  C01B33/10721

摘要： A process for production of polysilicon and silicon tetrachloride is provided in which a raw material that is supplied stably and is available at low cost can be used, chlorination reaction can be smoothly promoted, impurities generated after chlorination reaction can be controlled, and production efficiency is superior in a polysilicon producing step. The process includes a step of chlorination in which a granulated body consisting of silicon dioxide and carbon-containing material is chlorinated to generate silicon tetrachloride, a step of reduction in which silicon tetrachloride is reduced by a reducing metal to generate polysilicon, and a step of electrolysis in which chloride of the reducing metal by-produced in the reduction step is molten salt-electrolyzed to generate the reducing metal and chlorine gas. In the process, chlorine gas is supplied to the silicon dioxide and the carbon-containing material in the presence of oxygen gas, and these are reacted in the chlorination step, the reducing metal generated in the electrolysis step is reused in the reduction step as a reducing agent of silicon tetrachloride, and the chlorine gas generated in the electrolysis step is reused in the chlorination step.

摘要翻译： 提供一种生产多晶硅和四氯化硅的方法，其中可以使用稳定供应并且可以低成本获得的原料，可以平稳地促进氯化反应，可以控制氯化反应后产生的杂质，生产效率为 优于多晶硅生产步骤。 该方法包括氯化步骤，其中将由二氧化硅和含碳材料组成的造粒体氯化以产生四氯化硅，还原其中四氯化硅由还原性金属还原以产生多晶硅的步骤，以及步骤 在还原步骤中副产的还原金属的氯化物进行熔融盐电解以产生还原金属和氯气的电解。 在该方法中，在氧气存在下，向二氧化硅和含碳材料供给氯气，并且在氯化工序中使其反应，在还原工序中生成的还原金属在还原工序中再利用 四氯化钛的还原剂，并且在电解步骤中产生的氯气在氯化步骤中重复使用。

公开(公告)号：US06352681B1

公开(公告)日：2002-03-05

申请号：US09446826

申请日：1999-12-29

申请人： Matsuhide Horikawa ,  Hideki Sakai ,  Wataru Kagohashi

发明人： Matsuhide Horikawa ,  Hideki Sakai ,  Wataru Kagohashi

IPC分类号： C01F1100

CPC分类号： C01G23/006 ,  C01P2002/34 ,  C01P2004/32 ,  C01P2004/52 ,  C01P2004/62

摘要： A process for production of a barium titanate powder, the process comprises adding an aqueous solution of a titanium compound and an aqueous solution of a barium compound and an alkali metal hydroxide into an alkaline solution under stirring, thereby contacting the aqueous solutions with each other while controlling the molar ratio of the titanium compound to the barium compound to be within the range of 0.8 to 1.2.

摘要翻译： 一种制造钛酸钡粉末的方法，该方法包括在搅拌下将钛化合物的水溶液和钡化合物和碱金属氢氧化物的水溶液加入到碱性溶液中，由此使水溶液彼此接触，同时 控制钛化合物与钡化合物的摩尔比在0.8〜1.2的范围内。

公开(公告)号：US06284216B1

公开(公告)日：2001-09-04

申请号：US09462659

申请日：2000-01-12

申请人： Hideki Sakai ,  Matsuhide Horikawa ,  Wataru Kagohashi

发明人： Hideki Sakai ,  Matsuhide Horikawa ,  Wataru Kagohashi

IPC分类号： C01G2300

CPC分类号： H01G4/1227 ,  C01G23/006 ,  C01P2004/52 ,  C01P2004/62 ,  C01P2006/10 ,  C01P2006/40

摘要： A barium titanate powder has an average particle size ranging from 0.1-1.0 &mgr;m, a CV value (standard deviation of the particle size/the average particle size) of the particle size distribution being 40% or less, and a zeta-potential ranging from −30 to −60 mV measured by a laser Doppler method using electrophoresis at pH 6.4. The barium titanate powder is presintered at a temperature ranging from 900 to 1200° C. The barium titanate powder has superior dispersion characteristics in slurrying, and is capable of partly inhibiting agglomeration of the barium titanate after sintering. It is therefore suitable as materials for dielectric layers of multilayer ceramic capacitors. In particular, the barium titanate has a sintered density of 95% or more of the theoretical density thereof, and the dielectric constant is 4000 or more.

摘要翻译： 钛酸钡粉末的平均粒径为0.1〜1.0μm，粒径分布的CV值（粒径/平均粒径的标准偏差）为40％以下，ζ电位范围为 通过激光多普勒法在pH6.4下使用电泳测量-30至-60mV。 钛酸钡粉末在900〜1200℃的温度下进行预烧结。钛酸钡粉末在制浆时具有优异的分散特性，能够部分抑制烧结后的钛酸钡的凝集。 因此，它适用于多层陶瓷电容器介质层的材料。 特别是钛酸钡的烧结密度为理论密度的95％以上，介电常数为4000以上。

公开(公告)号：US07261761B2

公开(公告)日：2007-08-28

申请号：US10525963

申请日：2003-07-18

申请人： Wataru Kagohashi ,  Mitsugu Yoshida

发明人： Wataru Kagohashi ,  Mitsugu Yoshida

IPC分类号： B22F1/02

CPC分类号： H01G4/0085 ,  B22F1/0088 ,  B22F1/02

摘要： A metallic nickel powder exhibits superior oxidation behavior and sintering behavior in a process for production of a multilayer ceramic capacitor, and as a result, can prevent delamination, a process for production of the metallic powder is provided. The metallic nickel powder is treated with a carbonic acid water solution. The metallic nickel powder has an average particle diameter of not more than 1.0 μm, oxygen content in a range of from 0.3 to 2.0 wt %, and oxide layer having a thickness in a range of from 2 to 10 nm over the entire surface. In the process for production of the metallic nickel powder, the powder is treated with a carbonic acid water solution and is heated in an oxidizing atmosphere.

摘要翻译： 金属镍粉末在多层陶瓷电容器的制造方法中表现出优异的氧化性能和烧结性能，结果可以防止分层，提供金属粉末的制造方法。 金属镍粉末用碳酸水溶液处理。 金属镍粉末的平均粒径为1.0μm以下，氧含量为0.3〜2.0wt％，氧化物层的整个表面的厚度为2〜10nm。 在制造金属镍粉末的过程中，用碳酸水溶液处理粉末，并在氧化气氛中加热。

公开(公告)号：US20050268992A1

公开(公告)日：2005-12-08

申请号：US10525963

申请日：2003-07-18

申请人： Wataru Kagohashi ,  Mitsugu Yoshida

发明人： Wataru Kagohashi ,  Mitsugu Yoshida

IPC分类号： B22F1/00 ,  B22F1/02 ,  H01G4/008 ,  C23C8/80

CPC分类号： H01G4/0085 ,  B22F1/0088 ,  B22F1/02

摘要： A metallic nickel powder exhibits superior oxidation behavior and sintering behavior in a process for production of a multilayer ceramic capacitor, and as a result, can prevent delamination, a process for production of the metallic powder is provided. The metallic nickel powder is treated with a carbonic acid water solution. The metallic nickel powder has an average particle diameter of not more than 1.0 μm, oxygen content in a range of from 0.3 to 2.0 wt %, and oxide layer having a thickness in a range of from 2 to 10 nm over the entire surface. In the process for production of the metallic nickel powder, the powder is treated with a carbonic acid water solution and is heated in an oxidizing atmosphere.

摘要翻译： 金属镍粉末在多层陶瓷电容器的制造方法中表现出优异的氧化性能和烧结性能，结果可以防止分层，提供金属粉末的制造方法。 金属镍粉末用碳酸水溶液处理。 金属镍粉末的平均粒径为1.0μm以下，氧含量为0.3〜2.0wt％，氧化物层的整个表面的厚度为2〜10nm。 在制造金属镍粉末的过程中，用碳酸水溶液处理粉末，并在氧化气氛中加热。

公开(公告)号：US06863708B2

公开(公告)日：2005-03-08

申请号：US10343936

申请日：2002-06-11

申请人： Wataru Kagohashi ,  Mitsugu Yoshida ,  Tsuyoshi Asai

发明人： Wataru Kagohashi ,  Mitsugu Yoshida ,  Tsuyoshi Asai

IPC分类号： B22F9/28 ,  C22B1/08 ,  C22B5/12 ,  C22B23/06 ,  H01G4/008 ,  B22F9/26

CPC分类号： C22B23/06 ,  B22F9/28 ,  C22B1/08 ,  C22B5/12 ,  H01G4/0085 ,  Y10T29/49165

摘要： Metal chloride vapor and reducing gas are brought into contact to form metallic powder, the metallic powder is washed in carbonic acid aqueous solution, and the metallic powder is classified in a liquid phase. In this way, metallic powder, such as nickel powder, in which the content of chloride components is extremely small and the coarse particle content is small, can be efficiently produced.

摘要翻译： 使金属氯化物蒸气和还原气体接触形成金属粉末，金属粉末在碳酸水溶液中洗涤，金属粉末分级为液相。 以这种方式，可以有效地制备其中氯化物组分含量极小并且粗颗粒含量小的金属粉末，如镍粉。