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    Stability of gas atomized reactive powders through multiple step in-situ passivation
    4.
    发明申请
    Stability of gas atomized reactive powders through multiple step in-situ passivation 有权
    气体雾化反应性粉末通过多步原位钝化的稳定性

    公开(公告)号：US20130306205A1

    公开(公告)日：2013-11-21

    申请号：US13986193

    申请日：2013-04-10

    Applicant: Iowa State University Research Foundation, Inc.

    Inventor： Iver E. Anderson ,  Andrew D. Steinmetz ,  David J. Byrd

    IPC: C06B45/30 ,  B22F9/16

    CPC classification number: C06B45/30 ,  B22F1/0088 ,  B22F9/082 ,  B22F9/16 ,  B22F2009/0844 ,  B22F2999/00 ,  B22F2201/03 ,  B22F2201/00 ,  B22F2201/10

    Abstract: A method for gas atomization of oxygen-reactive reactive metals and alloys wherein the atomized particles are exposed as they solidify and cool in a very short time to multiple gaseous reactive agents for the in-situ formation of a protective reaction film on the atomized particles. The present invention is especially useful for making highly pyrophoric reactive metal or alloy atomized powders, such as atomized magnesium and magnesium alloy powders. The gaseous reactive species (agents) are introduced into the atomization spray chamber at locations downstream of a gas atomizing nozzle as determined by the desired powder or particle temperature for the reactions and the desired thickness of the reaction film.

    Abstract translation: 一种用于气体雾化氧反应性活性金属和合金的方法，其中当雾化颗粒在非常短的时间内固化并冷却到多个气态反应剂以暴露在雾化颗粒上的保护性反应膜的原位形成时，其被暴露。 本发明特别适用于制造高度自发性反应性金属或合金雾化粉末，如雾化镁和镁合金粉末。 气体反应性物质（试剂）被引入雾化喷雾室中，在气体雾化喷嘴下游的位置，由反应所需的粉末或颗粒温度和所需的反应膜厚度确定。

    Centrifugally atomized zinc alloy powder for alkaline batteries
    6.
    发明授权
    Centrifugally atomized zinc alloy powder for alkaline batteries 有权
    用于碱性电池的离心雾化锌合金粉末

    公开(公告)号：US07374840B1

    公开(公告)日：2008-05-20

    申请号：US09936531

    申请日：2000-02-03

    Applicant: Yvan Strauven ,  Bruno Gay

    Inventor： Yvan Strauven ,  Bruno Gay

    IPC: H01M4/42 ,  B22F9/10 ,  C22C18/00

    CPC classification number: H01M4/42 ,  B22F9/10 ,  B22F2009/0844 ,  C22C1/04

    Abstract: This invention relates to centrifugal atomized zinc alloy powders for alkaline batteries consisting of (a) 0.005-2% by weight of indium, and 0.005-0.2% by weight of either one of Al and Bi, or (b) 0.005-2% by weight of indium, and 0.005-0.2% by weight of Bi, and 0.001-0.5% of either one or both of Al and Ca, or (c) 0.005-2% by weight of either one or both of Bi and Al, and 0-0.5% by weight of Pb, the remainder being zinc. The powder is obtained by centrifugal atomisation in a protective atmosphere, where the oxygen content is less than 4% by volume. The resistance to corrosion in the electrolyte of the battery, especially after partial discharge, is markedly better than when the same alloys are prepared by the traditional production process. The capacity of batteries containing these powders is very good.

    Abstract translation: 本发明涉及由（a）0.005-2重量％的铟和0.005-0.2重量％的Al和Bi中的任一种组成的碱性电池的离心雾化锌合金粉末，或（b）0.005-2％ 铟的重量和0.005-0.2重量％的Bi和0.001-0.5％的Al和Ca中的任一个或两者，或（c）0.005-2重量％的Bi和Al中的任一个或两个，以及 0-0.5重量％的Pb，其余为锌。 粉末通过在保护气氛中的离心雾化获得，其中氧含量小于4体积％。 电池电解液中的耐腐蚀性，特别是局部放电后的耐腐蚀性明显优于传统生产工艺制备相同合金时的耐腐蚀性。 含有这些粉末的电池的容量非常好。

    Method and apparatus for producing metallic ultrafine particles
    7.
    发明申请
    Method and apparatus for producing metallic ultrafine particles 审中-公开
    金属超微粒子的制造方法和装置

    公开(公告)号：US20070062333A1

    公开(公告)日：2007-03-22

    申请号：US11401411

    申请日：2006-04-11

    Applicant: Junichi Saito ,  Kuniaki Ara ,  Hiroaki Ohira ,  Kuniaki Miura ,  Toshihiko Ogasawara

    Inventor： Junichi Saito ,  Kuniaki Ara ,  Hiroaki Ohira ,  Kuniaki Miura ,  Toshihiko Ogasawara

    IPC: B22F9/12

    CPC classification number: B22F1/0018 ,  B22F9/08 ,  B22F2009/0844 ,  B82Y30/00

    Abstract: An object of the present invention is to efficiently produce ultrafine particles having such a small diameter as 50 nm or less, a narrow range of size distribution, and a non-oxidation surface. According to the present invention, the metallic ultrafine particles are produced by dropping a raw metallic powder onto a controllably heated evaporating surface in a decompressed inert gas; instantly evaporating the raw metallic powder to form the ultrafine particle; and condensing and depositing the ultrafine particle on a trapping surface arranged above the evaporating surface. The raw metallic powder is any one of a single metal, an alloy and an intermetallic compound, preferably has an average particle diameter controlled to 500 μm or smaller so that the powder can be instantly evaporated, and is preferably supplied by a minute amount.

    Abstract translation: 本发明的目的是有效地制造具有50nm以下的小直径，窄范围的尺寸分布和非氧化面的超微粒子。 根据本发明，通过在减压惰性气体中将原料金属粉末滴加到可控加热的蒸发表面上来制造金属超微粒子; 立即蒸发原料金属粉末，形成超细颗粒; 并将超细颗粒冷凝并沉积在布置在蒸发表面上方的捕集表面上。 原料金属粉末是单一金属，合金和金属间化合物中的任一种，优选将平均粒径控制在500μm以下，使得粉末能够瞬间蒸发，优选以微量的量供给。

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