-
公开(公告)号：US5439656A
公开(公告)日：1995-08-08
申请号：US227323
申请日：1994-04-14
申请人： Yuji Kimura , Shigeru Sakai
发明人： Yuji Kimura , Shigeru Sakai
CPC分类号： C01F17/005 , C01F17/0043
摘要： An improved method is proposed for the preparation of a powder of a rare earth oxide having good dispersibility containing no agglomerates of particles even without undertaking disintegration indispensable heretofore. The improved method comprises precipitation of a rare earth carbonate by the admixture of an aqueous solution of an inorganic rare earth salt with an aqueous solution of ammonium hydrogen carbonate in an excess amount over the stoichiometrically equivalent amount to give a slurry of the rare earth carbonate which is subjected to heating treatment in two steps each under specified conditions to effect aging of the carbonate precipitates. Characteristically, the aqueous slurry after the first aging treatment is subjected to an adjustment in three differently specified ways prior to the second aging treatment including, first, admixture of an additional amount of ammonium hydrogen carbonate, second, addition of water to decrease the solid content in the slurry and, third, addition of an inorganic acid to decrease the pH of the slurry.
摘要翻译： 提出了一种改进的方法，用于制备即使不进行迄今不可或缺的分解的具有不含颗粒附聚物的良好分散性的稀土氧化物粉末。 改进的方法包括通过将无机稀土盐的水溶液与过量的碳酸氢铵水溶液以化学计量当量的量混合来沉淀稀土碳酸盐，得到稀土碳酸盐的浆料， 在规定条件下分两步进行加热处理，以使碳酸盐析出物老化。 特征地，第一时效处理后的含水浆料在第二时效处理之前以三种不同的方式进行调节，包括：首先混合附加量的碳酸氢铵，其次，加入水以降低固含量 在浆料中，第三，加入无机酸以降低浆料的pH。
-
公开(公告)号：US5567403A
公开(公告)日：1996-10-22
申请号：US453400
申请日：1995-05-30
申请人： Yuji Kimura , Shigeru Sakai
发明人： Yuji Kimura , Shigeru Sakai
CPC分类号： C01B25/37 , C09K11/7777
摘要： Proposed is a method for the preparation of a rare earth phosphate powder or, in particular, a composite rare earth phosphate powder of lanthanum, cerium and terbium having properties suitable for use as a base material of phosphors in fluorescent lamps in respect of particle size distribution of 1-10 .mu.m and globular particle configuration. The method is basically a precipitation method by mixing aqueous solutions of a water-soluble salt of the rare earth element or elements and phosphoric acid but the inventive method is characterized by completing introduction of the rare earth salt solution into the phosphoric acid solution within a limited length of time of 3 seconds to 5 minutes at a specified temperature, each of the solutions having a specified concentration.
摘要翻译： 提出了一种制备稀土磷酸盐粉末或特别是具有适合用作荧光灯中的荧光体的基础材料的特性的镧，铈和铽的复合稀土磷酸盐粉末的方法，用于粒度分布 1-10μm，球状颗粒构型。 该方法基本上是通过混合稀土元素或磷酸的水溶性盐的水溶液和磷酸的沉淀方法，但是本发明的方法的特征在于在有限的范围内完成将稀土盐溶液引入磷酸溶液 在指定温度下3秒至5分钟的时间长短，每个溶液具有指定的浓度。
-
3.发明授权
公开(公告)号：US5415851A
公开(公告)日：1995-05-16
申请号：US199729
申请日：1994-02-22
申请人： Yuji Kimura , Shigeru Sakai , Norifumi Yoshida
发明人： Yuji Kimura , Shigeru Sakai , Norifumi Yoshida
CPC分类号： C09K11/7777 , C01B25/37 , C01B25/45
摘要： A precipitation method is proposed for the preparation of a rare earth phosphate powder by the reaction of a water-soluble salt of the rare earth element in an aqueous solution with an ammonium phosphate, which gives a rare earth phosphate powder consisting of non-agglomerate discrete particles having a spherical particle configuration suitable as a base material of rare earth-based phosphors. The method is characterized by the addition of the ammonium phosphate in the form of a powder to an acidic aqueous solution of the rare earth salt under specified conditions in contrast to the conventional method in which the ammonium phosphate is admixed in the form of an aqueous solution.
摘要翻译： 提出了通过稀土元素的水溶性盐与磷酸铵反应制备稀土磷酸盐粉末的沉淀法，得到由非聚集体离散的稀土磷酸盐粉末 具有适合作为稀土类荧光体的基材的球状粒子构造的粒子。 该方法的特征在于在特定条件下向稀土盐的酸性水溶液中加入粉末形式的磷酸铵，与常规方法相比，其中将磷酸铵以水溶液的形式 。
-
4.发明授权
公开(公告)号：US5352426A
公开(公告)日：1994-10-04
申请号：US164453
申请日：1993-12-09
申请人： Yuji Kimura , Shigeru Sakai , Norifumi Yoshida
发明人： Yuji Kimura , Shigeru Sakai , Norifumi Yoshida
CPC分类号： C09K11/7777 , C01F17/005 , C01P2004/32 , C01P2004/51 , C01P2004/61
摘要： An improved method is proposed for the preparation of a composite carbonate powder of lanthanum, cerium and terbium as a base material of a green-emitting phosphor for which the carbonate powder is desired to have a uniform particle size distribution and a particle configuration as close to spherical as possible. The improved method is characterized by two-step heat treatment of the carbonate slurry formed by the addition of, for example, ammonium hydrogen carbonate to a mixed aqueous solution of lanthanum, cerium and terbium nitrates each under specified conditions while the pH of the aqueous slurry is adjusted to 5.0 to 7.5 after the first step heat treatment but before the second step heat treatment.
摘要翻译： 提出了一种改进的方法，用于制备镧，铈和铽的复合碳酸盐粉末作为绿色发光磷光体的基材，其中期望碳酸盐粉末具有均匀的粒度分布和颗粒构型接近于 球形尽可能。 改进的方法的特征在于通过在特定条件下将氮碳酸盐添加到镧，铈和铽硝酸盐的混合水溶液中形成的碳酸盐浆料进行两步热处理，同时水性浆料的pH 在第一步热处理之后但在第二步热处理之前调节为5.0至7.5。
-
公开(公告)号：US06673143B2
公开(公告)日：2004-01-06
申请号：US09809266
申请日：2001-03-16
申请人： Shigeru Sakai , Yuji Kimura
发明人： Shigeru Sakai , Yuji Kimura
IPC分类号： C04B1400
CPC分类号： C04B35/584
摘要： An aqueous slurry of rare earth hydroxide particles which is particularly suitable for use as a sintering aid of a ceramic powder such as silicon nitride. The aqueous slurry, which is characterized by the very small average diameter of the primary particles and a low electric conductivity as well as outstandingly high stability against settling of the particles, can be prepared by a process comprising the steps of: (a) precipitating rare earth hydroxide particles by mixing aqueous solutions of a rare earth compound, e.g., nitrate, and a basic compound, e.g., ammonia, preferably, in the presence of a surface active agent; (b) collecting the precipitates to give a cake; (c) washing the cake with deionized water until the electric conductivity of the washing has decreased to 3 mS/cm or lower; and (d) re-dispersing the thus washed cake in deionized water.
摘要翻译： 稀土氢氧化物颗粒的水性浆料，其特别适合用作陶瓷粉末如氮化硅的烧结助剂。 其特征在于初级颗粒的平均直径非常小，导电性低以及对颗粒沉降的极高稳定性的含水浆料可以通过包括以下步骤的方法制备：（a）将稀有的沉淀物 通过混合稀土化合物（例如硝酸盐）和碱性化合物（例如氨）的水溶液，优选在表面活性剂的存在下混合地球氢氧化物颗粒; （b）收集沉淀物以得到蛋糕; （c）用去离子水洗涤滤饼直到洗涤液的电导率降至3mS / cm以下; 和（d）将如此洗涤的滤饼重新分散在去离子水中。
-
6.发明授权
公开(公告)号：US5911921A
公开(公告)日：1999-06-15
申请号：US915083
申请日：1997-08-20
申请人： Yasushi Takai , Yuji Kimura , Shigeru Sakai
发明人： Yasushi Takai , Yuji Kimura , Shigeru Sakai
IPC分类号： C09K3/00 , B82Y30/00 , C01B25/37 , C01B25/45 , C09D11/00 , C09D11/02 , C09D11/03 , C09D11/50 , C09K11/81 , G02B5/20 , C01F17/00
摘要： Proposed is a powder of ytterbium phosphate having a non-stoichiometric phosphorus to ytterbium molar ratio of 1.08 to 2.0 and having a specified average particle diameter and specified diameter of the crystallites forming the particles. The powder is useful as an infrared-absorbing pigment in a printing ink invisible to naked eyes but detectable by an infrared detecting means for printing of stealth bar code patterns. The ytterbium phosphate powder can be prepared in a convenient and inexpensive method utilizing the precipitation reaction by mixing an aqueous phosphoric acid solution and ytterbium salt solution under specified conditions followed by calcination of the precipitates at a specified temperature and pulverization of the calcined precipitates to give the specified average particle diameter.
摘要翻译： 提出具有非化学计量的磷与镱的摩尔比为1.08〜2.0的磷酸镱的粉末，具有指定的平均粒径和形成微粒的微晶的规定直径。 该粉末可用作裸眼不可见的印刷油墨中的红外线吸收颜料，但可通过用于印刷隐形条形码图案的红外检测装置检测。 磷酸镱粉末可以通过在特定条件下混合磷酸水溶液和镱盐溶液，然后在规定温度下煅烧沉淀物并使煅烧沉淀物粉碎而使用沉淀反应方便且廉价的方法制备，得到 指定平均粒径。
-
公开(公告)号：US5914287A
公开(公告)日：1999-06-22
申请号：US984187
申请日：1997-12-03
申请人： Fumihiko Saito , Shigeru Sakai
发明人： Fumihiko Saito , Shigeru Sakai
IPC分类号： C01F17/00 , C04B35/50 , C04B35/626 , C04B35/628 , C04B41/45 , C04B41/81
CPC分类号： C04B35/62815 , C01F17/0043 , C04B35/111 , C04B35/468 , C04B35/486 , C04B35/50 , C04B35/581 , C04B35/584 , C04B35/597 , C04B35/6263 , C04B35/628 , C04B35/62897 , C04B35/63424 , C04B41/009 , C04B41/4584 , C04B41/81 , C01P2004/80 , C04B2235/3224 , C04B2235/3225 , C04B2235/5436 , Y10T428/2991
摘要： Proposed is a powder consisting of rare earth oxide-based composite particles having an average particle diameter in the range from 0.1 to 100 .mu.m, each of which has a composite structure consisting of a core of a rare earth oxide and a coating layer of a rare earth hydroxide, the coating layer of the rare earth hydroxide having an average thickness of at least 5 nm but not exceeding 10% of the average particle diameter of the composite particles. While a rare earth oxide powder is useful as a sintering aid of a ceramic powder which is used in molding usually in the form of an aqueous slurry, the composite particles when added to an aqueous slurry of a ceramic powder exhibit a remarkable effect as a viscosity stabilizer or gelation inhibitor of the aqueous slurry so that improvements can be obtained in the productivity of the manufacturing process and quality of ceramic products.
摘要翻译： 提出了由平均粒径为0.1〜100μm的稀土氧化物系复合粒子构成的粉末，其中，所述复合粒子的复合结构由稀土类氧化物的核心和 稀土氢氧化物，稀土氢氧化物的涂层的平均厚度为复合颗粒的平均粒径至少5nm但不超过10％。 虽然稀土氧化物粉末可用作陶瓷粉末的烧结助剂，其通常以水性浆液的形式用于模塑中，但当加入到陶瓷粉末的水性浆料中时，复合颗粒显示出显着的效果，作为粘度 稳定剂或凝胶抑制剂，从而可以在制造过程的生产率和陶瓷产品的质量方面获得改进。
-
8.发明授权
公开(公告)号：US5644037A
公开(公告)日：1997-07-01
申请号：US433925
申请日：1995-05-02
申请人： Masami Kaneyoshi , Isamu Fujioka , Shigeru Sakai
发明人： Masami Kaneyoshi , Isamu Fujioka , Shigeru Sakai
CPC分类号： C07C51/412
摘要： Disclosed is a method for the preparation of particles of a rare earth ammonium double oxalate by mixing a first aqueous solution of ammonium oxalate and a second aqueous solution of a water-soluble rare earth salt. The double oxalate particles have a polyhedral particle configuration with a uniform particle size distribution, from which a rare earth oxide powder of a polyhedral particle configuration with good flowability can be obtained by calcination, when the first and second aqueous solutions are prepared under exact control of the concentrations of the respective ionic species and the aqueous slurry containing the precipitates of the double oxalate is subjected to an aging treatment during which changes take place in the particle morphology and in the crystallographic structure of the double oxalate particles.
摘要翻译： 公开了通过混合草酸铵的第一水溶液和水溶性稀土盐的第二水溶液来制备双草酸稀土铵的颗粒的方法。 双草酸盐颗粒具有均匀粒度分布的多面体颗粒构型，当第一和第二水溶液在精确控制下制备第一和第二水溶液时，可以通过煅烧获得具有良好流动性的多面体颗粒构型的稀土氧化物粉末 对含有双草酸盐的析出物的各离子种类和含水浆料的浓度进行时效处理，在该处理期间，在双重草酸盐颗粒的颗粒形态和晶体结构中发生变化。
-
9.发明授权Electrode for rechargeable battery with nonaqueous electrolyte and process for producing the same 失效具有非水电解质的可充电电池用电极及其制造方法
公开(公告)号：US5846674A
公开(公告)日：1998-12-08
申请号：US879602
申请日：1997-06-20
申请人： Shigeru Sakai , Toru Mangahara , Kazuo Umeda , Kiyoshi Oguchi , Mitsuru Tsuchiya
发明人： Shigeru Sakai , Toru Mangahara , Kazuo Umeda , Kiyoshi Oguchi , Mitsuru Tsuchiya
CPC分类号： H01M4/621 , H01M4/02 , H01M2300/0025 , Y10T29/49115
摘要： An electrode for a rechargeable battery with a nonaqueous electrolyte is provided wherein the active material layer has a sufficient flexibility, the adhesion between the active material coating and the metal foil collector is good, none of peeling, falling, cracking and other unfavorable phenomena occur in the active material coating in the step of assembling a battery and excellent discharge characteristics can be developed. The electrode for a rechargeable battery with a nonaqueous electrolyte comprises a metal foil collector and, formed on at least a part of the metal foil collector, an active material layer comprising an active material and a cured reaction-curing binder as essential components.
摘要翻译： 提供一种具有非水电解质的可再充电电池用电极，其中活性物质层具有足够的柔软性，活性物质涂层与金属箔收集体之间的粘附性良好，不会发生剥离，脱落，开裂等不利现象 可以开发组装电池的步骤中的活性材料涂层和优异的放电特性。 用于具有非水电解质的可再充电电池的电极包括金属箔收集器，并且在金属箔收集器的至少一部分上形成包含活性材料的活性材料层和固化的反应固化粘合剂作为必要组分。
-
公开(公告)号：US5225449A
公开(公告)日：1993-07-06
申请号：US943576
申请日：1992-09-11
CPC分类号： C08J9/02 , C08J2333/00
摘要： The present invention provides expandable plastics having a molecular weight of 50,000 to 500,000 which comprises the following structural units (I), (II) and (III) giving a foam having heat resistance and fine structure by heating, the molar ratio of (I+II) to (III) being 1 to 0.6-1.5 and the proportion of (I) being 5 to 50 wt. % of the total components: ##STR1## wherein R represents a hydrogen atom or a methyl group. When the copolymer, the expandable plastics, of the present invention is used, white foams having a very fine texture are obtained without using special foaming agents, and besides the heat resistance of the foams is high and the amount of water absorbed thereby is little. The foams of the present invention, therefore, can be used in a wide range as soundproofing materials and heat insulators for which the conventional foams cannot be used because of their low heat resistance, and substitutes for honeycomb structures used in airplanes.
-
-
-
-
-
-
-
-
-
搜索结果
34 条记录 (耗时 0.016 秒)
