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公开(公告)号：US4028095A
公开(公告)日：1977-06-07
申请号：US672502
申请日：1976-03-31
CPC分类号： C23C4/08 , B22F1/0096
摘要： Free flowing powders, such as for flame spray applications, are produced by spray drying a slurry of finely divided particles of the metal in a solvent-binder system to produce agglomerates, wherein the binder is a soluble compound of the metal. These agglomerates possess sufficient green strength to be screened and exhibit higher apparent densities than comparable powders agglomerated with conventional organic binders. When these powders are heated in a reducing atmosphere above the decomposition temperature of the binder, the binder converts to base metal and harmless by-products, such as nitrogen and water thus avoiding contamination of the product, equipment and work area usually associated with conventional organic binders.
摘要翻译： 通过在溶剂 - 粘合剂体系中喷雾干燥细分散的金属颗粒的浆料来产生自由流动的粉末，例如用于火焰喷涂的粉末，以产生附聚物，其中粘合剂是金属的可溶性化合物。 这些附聚物具有足够的生坯强度以进行筛选并且表现出比用常规有机粘合剂附聚的可比粉末更高的表观密度。 当这些粉末在高于粘合剂分解温度的还原气氛中加热时，粘合剂转化为贱金属和无害的副产物，如氮气和水，从而避免了通常与常规有机物相关的产品，设备和工作区域的污染 粘合剂
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公开(公告)号：US3947616A
公开(公告)日：1976-03-30
申请号：US401428
申请日：1973-09-27
CPC分类号： C04B41/009 , C04B41/5144 , C04B41/5188 , C04B41/88 , C23C18/34 , C23C30/005 , Y10T428/12139
摘要： Cemented refractory metal carbides are coated with cobalt to a predetermined thickness by immersing a cemented refractory metal carbide in an aqueous slurry consisting essentially of a cobalt source, a hydrazine compound and a buffering agent to provide a pH greater than 7 and maintaining the temperature of the slurry at from about 65.degree. to 90.degree.C for a sufficient time to achieve the desired thickness of cobalt coating on the external surfaces of the cemented refractory metal carbide.
摘要翻译： 通过将粘结的难熔金属碳化物浸入基本上由钴源，肼化合物和缓冲剂组成的含水浆料中以使pH大于7并保持其温度，从而将硬质合金难熔金属碳化物以钴涂覆至预定厚度 浆料在约65℃至90℃下持续足够的时间以在胶结的难熔金属碳化物的外表面上实现所需厚度的钴涂层。
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33.发明授权Hydrometallurgical process for producing irregular shaped powders with readily oxidizable alloying elements 失效用于生产具有易氧化合金元素的不规则形状粉末的湿法冶金工艺
公开(公告)号：US5102454A
公开(公告)日：1992-04-07
申请号：US303076
申请日：1989-01-30
CPC分类号： B22F9/22 , C22C33/0285
摘要： Composite powders containing a first group of metals of iron, cobalt, nickel and molybdenum in specific ratios and one or more oxidizable metals can be formed by forming an aqueous solution containing first group of metals, forming solid material of the metals from the solution, reducing the solid material to a metallic powder, combining that powder with one or more easily oxidizable metals in an non-oxidizing atmosphere.
摘要翻译： 可以通过形成含有第一组金属的水溶液，从溶液中形成金属的固体材料，形成含有特定比例的铁，钴，镍和钼的第一组金属和一种或多种可氧化金属的复合粉末， 将固体材料与金属粉末组合，将该粉末与一种或多种容易氧化的金属在非氧化性气氛中组合。
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公开(公告)号：US4948527A
公开(公告)日：1990-08-14
申请号：US419235
申请日：1989-10-10
CPC分类号： C09K11/7787
摘要： A europium activated yttrium oxide phosphor is prepared as follows. Europium oxide is dissolved in nitric acid. Ammonium hydroxide is added to precipitate europium hydroxide, which is then dissolved in citric acid monohydrate to form europium citrate solution. Yttrium oxide powder is added to the solution to form a slurry, which is then spray dried. The spray dried powder is fired at a high temperature to form the phosphor.
摘要翻译： 铕活化钇氧化物荧光体如下制备。 将氧化铕溶解在硝酸中。 加入氢氧化铵以沉淀氢氧化铕，然后将其溶于柠檬酸一水合物中以形成柠檬酸铕溶液。 将氧化钇粉末加入到溶液中以形成浆料，然后喷雾干燥。 将喷雾干燥的粉末在高温下烧成以形成荧光体。
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35.发明授权
公开(公告)号：US4927456A
公开(公告)日：1990-05-22
申请号：US54479
申请日：1987-05-27
CPC分类号： B22F1/0048
摘要： A process for producing finely divided spherical iron group based metallic powders comprises forming an aqueous solution containing a source of the appropriate metal sources in a mineral acid, forming a reducible iron group based material from the solution, reducing the material to iron group based metal powder particles, subjecting the metal particles to a high temperature zone to melt a portion of the particles and to form droplets and cooling the droplets to form an essential spherical iron group based metallic powders.
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公开(公告)号：US4898749A
公开(公告)日：1990-02-06
申请号：US292715
申请日：1989-01-03
CPC分类号： C23C24/00 , B22F1/02 , C23C18/1216 , C23C18/1241 , C23C18/1275
摘要： A method is disclosed for producing aluminum oxide coated cobalt powder which comprises contacting cobalt powder of fine particle size with a liquid aluminum compound wherein the aluminum is hydrolyzable and adding water to the compound and the cobalt powder to form a slurry, removing essentially all of the liquid from the slurry to produce cobalt powder with a coating of hydrolyzed aluminum oxide, and firing the cobalt powder with the hydrolyzed aluminum oxide coating in a non-oxidizing atmosphere to produce cobalt powder with a coating of aluminum oxide.
摘要翻译： 公开了一种用于制造氧化铝涂覆的钴粉末的方法，该方法包括将细粒度的钴粉末与液体铝化合物接触，其中铝是可水解的并且向化合物和钴粉末加水以形成浆料，基本上除去所有 液体从浆料中产生钴粉末并涂覆水解氧化铝，并在非氧化性气氛中用水解的氧化铝涂层焙烧钴粉末，制成具有氧化铝涂层的钴粉末。
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37.发明授权Hydrometallurgical process for producing spherical maraging steel powders with readily oxidizable alloying elements 失效用于生产具有易氧化合金元素的球形马氏体时效钢粉末的湿法冶金工艺
公开(公告)号：US4859237A
公开(公告)日：1989-08-22
申请号：US140701
申请日：1988-01-04
CPC分类号： C22C33/0207 , B22F1/0048
摘要： A process for producing a blend of maraging steel alloys and an oxidizable metal comprises forming an aqueous solution or iron, cobalt, nickel and molybdenum in a predetermined ratio. Thereafter, a reducible solid material containing the metals is produced from the solution. The solid material is reduced to metallic powder particles which are entrained in a carrier gas and fed into a high temperature zone to form droplets which are cooled to form essentially spherical shaped metal alloy particles. These particles are combined with a predetermined amount of at least one easily oxidizable metal selected from the group consisting of aluminum, titanium and vanadium to form a relative uniform blend of the spherical shaped particles and the readily oxidizable metal.
摘要翻译： 制造马氏体时效钢合金和可氧化金属的共混物的方法包括以预定比例形成水溶液或铁，钴，镍和钼。 此后，从溶液中制备含有金属的可还原固体材料。 固体材料被还原成金属粉末颗粒，其被夹带在载气中并进料到高温区以形成液滴，冷却形成基本上为球形的金属合金颗粒。 这些颗粒与预定量的至少一种选自铝，钛和钒的易氧化金属组合，以形成球形颗粒和容易氧化的金属的相对均匀的共混物。
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38.发明授权
公开(公告)号：US4792351A
公开(公告)日：1988-12-20
申请号：US140517
申请日：1988-01-04
CPC分类号： B22F9/22 , C22C33/0285
摘要： A process for producing powder particles comprises forming an aqueous solution of the metal values of iron, cobalt, nickel and molybdenum, said metals being present in a predetermined ratio, forming from the solution a reducible solid material selected from the group consisting of salts of said metals, oxides of said metals, hydroxides of said metals and mixtures thereof, and reducing said material to form irregular shaped metallic powder particles.
摘要翻译： 制造粉末颗粒的方法包括形成铁，钴，镍和钼的金属值的水溶液，所述金属以预定比例存在，从溶液中形成可还原固体材料，所述可还原固体材料选自所述 金属，所述金属的氧化物，所述金属的氢氧化物及其混合物，还原所述材料以形成不规则形状的金属粉末颗粒。
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公开(公告)号：US4710368A
公开(公告)日：1987-12-01
申请号：US864614
申请日：1986-05-19
申请人： Joseph E. Ritsko , Howard L. Acla
发明人： Joseph E. Ritsko , Howard L. Acla
IPC分类号： C01B21/068 , C01B33/06
CPC分类号： C01B21/0685 , C01P2006/12 , C01P2006/80
摘要： High purity silicon nitride particles are disclosed which are essentially alpha crystalline and which have a surface area of greater than about 25 m.sup.2 /g.
摘要翻译： 公开了高纯度氮化硅颗粒，其基本上为α晶体，并且其表面积大于约25m 2 / g。
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公开(公告)号：US4695439A
公开(公告)日：1987-09-22
申请号：US911603
申请日：1986-09-25
CPC分类号： C01G25/02 , C01P2004/32 , C01P2004/50 , C01P2004/61
摘要： A process for forming a homogeneous mixture of yttrium oxide and zirconium oxide involves dissolving yttrium oxide and hydrochloric acid in water, precipitating yttrium hydroxide by adding ammonium hydroxide to the solution and dissolving yttrium hydroxide in acetic acid, adding zirconium oxide to the resulting solution which is thereafter spray dried to yield an agglomerate having uniformly distributed yttrium acetate throughout and thereafter converting the yttrium acetate to yttrium oxide to yield an agglomerate having uniform distribution of yttrium oxide and zirconium oxide. The yttrium oxide/zirconium oxide agglomerates have a particle size of from about 20 to about 200 microns. The intermediate agglomerate contains a uniform distribution of yttrium acetate and provides a composition which can be converted to a yttrium oxide/zirconium oxide agglomerate having a homogeneous mixture of the two components.
摘要翻译： 形成氧化钇和氧化锆的均匀混合物的方法包括将氧化钇和盐酸溶于水中，通过向溶液中加入氢氧化铵沉淀氢氧化钇，并将氢氧化钇溶解在乙酸中，向得到的溶液中加入氧化锆 然后喷雾干燥以产生具有均匀分布的乙酸钇的附聚物，然后将乙酸钇转化为氧化钇，得到具有均匀分布的氧化钇和氧化锆的附聚物。 氧化钇/氧化锆附聚物的粒径为约20至约200微米。 中间凝聚体含有均匀分布的乙酸钇，并提供可以转化为具有两种组分均匀混合物的氧化钇/氧化锆附聚物的组合物。
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