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    Method of making electroluminescent phosphors with small particle sizes and powder with D50 value of no more than 10 micrometers
    3.
    发明授权
    Method of making electroluminescent phosphors with small particle sizes and powder with D50 value of no more than 10 micrometers 有权
    制造具有小粒径的电致发光荧光体和D50值不大于10微米的粉末的方法

    公开(公告)号：US07288216B2

    公开(公告)日：2007-10-30

    申请号：US10907358

    申请日：2005-03-30

    Applicant: Xianzhong Chen ,  Shellie K. Northrop

    Inventor： Xianzhong Chen ,  Shellie K. Northrop

    IPC: C09K11/56 ,  C09K11/54

    CPC classification number: H05B33/14 ,  C09K11/584

    Abstract: An electroluminescent phosphor powder includes copper-activated zinc sulfide particles that have a size distribution with a D50 value of no more than 10 μm, where no more than 25% of the particles have a size greater than about 15 μm and/or a 24-hr brightness of at least 15 footlamberts. These particles are made by a method that includes first firing copper-doped zinc sulfide mixed with zinc oxide, sulfur and a chloride-containing flux, rapidly cooling the mixture to below 100° C., and then mulling and second firing the mixture to provide a powder. The powder can then be elutriated to provide the electroluminescent powder with a narrow particle size distribution (more than 90% between about 5 and 15 μm). The elutriating step can be avoided (albeit with a slightly wider size distribution) by more tightly controlling the first firing temperature.

    Abstract translation: 电致发光荧光体粉末包括具有D50值不超过10μm的尺寸分布的铜活化的硫化锌颗粒，其中不超过25％的颗粒具有大于约15μm的尺寸和/或24- 小时至少15英尺的亮度。 这些颗粒通过以下方法制造：首先将与氧化锌，硫和含氯化物的助熔剂混合的掺铜的硫化锌，快速冷却到低于100℃，然后研磨和二次烧制该混合物， 一粉 然后可以将粉末淘洗以提供具有窄的粒度分布的电致发光粉末（在约5和15μm之间大于90％）。 通过更紧密地控制第一烧制温度，可以避免淘洗步骤（尽管具有略宽的分布）。

    Process for producing electroluminescent phosphor with increased efficiency
    4.
    发明授权
    Process for producing electroluminescent phosphor with increased efficiency 失效
    具有提高效率的电致发光荧光体的制造方法

    公开(公告)号：US06387299B1

    公开(公告)日：2002-05-14

    申请号：US09630400

    申请日：2000-08-02

    Applicant: Butchi Reddy Vaddi ,  Shellie K. Northrop

    Inventor： Butchi Reddy Vaddi ,  Shellie K. Northrop

    IPC: C09K1156

    CPC classification number: C09K11/612

    Abstract: An electroluminescent phosphor with an increased efficiency is created by blending a chloride flux, a copper source and a zinc sulfide to form a mixture and then heating the mixture for a period of time, cooling the mixture, and washing it with de-ionized water. The mixture is dried and milled to form cubic ZnS from hexagonal ZnS, forming a beginning uncoated ZnS:Cu,Cl electroluminescent phosphor. This beginning phosphor is added to other materials, including Ga2O3, forming a second step material (SSM). The SSM is placed into a first vessel, such as a plastic bottle, blended, sifted and then placed in a second inert reaction vessel that is then heated for a period of time. After cooling, the fired SSM is washed with de-ionized water, washed with acetic acid, again washed with de-ionized water to remove residual acid, washed with KCN and again with de-ionized water to remove residual KCN. The fired and washed SSM is then dried, filtered and sifted, producing a new phosphor with an increased efficiency.

    Abstract translation: 通过混合氯化物助熔剂，铜源和硫化锌以形成混合物，然后将混合物加热一段时间，冷却混合物，并用去离子水洗涤，产生效率提高的电致发光磷光体。 将混合物干燥并研磨以从六方ZnS形成立方ZnS，形成最初的未涂覆的ZnS：Cu，Cl电致发光磷光体。 将这种起始的磷光体添加到其它材料中，包括形成第二步骤材料（SSM）的Ga 2 O 3。 将SSM放入第一容器中，例如塑料瓶，混合，筛分，然后置于第二惰性反应容器中，然后将其加热一段时间。 冷却后，用去离子水洗涤烧制的SSM，用乙酸洗涤，再次用去离子水洗涤以除去残留的酸，用KCN再次用去离子水洗涤以除去残留的KCN。 然后将烧制和洗涤的SSM干燥，过滤并筛分，产生效率提高的新型磷光体。

    Lithium doped terbium activated gadolinium oxysulfide phosphor
    8.
    发明授权
    Lithium doped terbium activated gadolinium oxysulfide phosphor 失效
    掺锂铽活化钆氧硫化物荧光粉

    公开(公告)号：US5783106A

    公开(公告)日：1998-07-21

    申请号：US935645

    申请日：1997-09-23

    Applicant: Vaddi Butchi Reddy ,  Shellie K. Northrop

    Inventor： Vaddi Butchi Reddy ,  Shellie K. Northrop

    IPC: C09K11/77 ,  C09K11/84

    CPC classification number: C09K11/7771

    Abstract: The brightness of small size terbium activated gadolinium oxysulfide (Gd.sub.2-x Tb.sub.x O.sub.2 S) phosphor is increased by the incorporation of a lithium dopant. The lithium dopant is added to the phosphor by mixing lithium phosphate with the raw materials formulated to make the phosphor.

    Abstract translation: 通过引入锂掺杂剂，增加了小尺寸铽激活的硫代氧化钆（Gd2-xTbxO2S）荧光粉的亮度。 通过混合磷酸锂和配制成制造荧光体的原料将锂掺杂剂加入到磷光体中。

    Method for reducing impurities in hexammine cobalt halide compounds
    10.
    发明授权
    Method for reducing impurities in hexammine cobalt halide compounds 失效
    减少六卤化钴化合物杂质的方法

    公开(公告)号：US5102633A

    公开(公告)日：1992-04-07

    申请号：US703211

    申请日：1991-05-20

    Applicant: Eric F. Husted ,  Michael J. Miller ,  Shellie K. Northrop ,  David T. Smith

    Inventor： Eric F. Husted ,  Michael J. Miller ,  Shellie K. Northrop ,  David T. Smith

    IPC: C01G51/12

    CPC classification number: C01G51/12

    Abstract: A method for reducing impurity levels of calcium, magnesium and/or silicon in hexammine cobalt halide compounds involves the addition of ferric ions and, optionally, soluble fluorides to an aqueous hexammine cobalt (III) chloride solution having a pH of at least 9. Insoluble compounds of magnesium fluoride, calcium fluoride, and/or ferric hydroxide and silicon coprecipitates are removed from the solution by filtration.

    Abstract translation: 一种减少六卤化钴化合物中钙，镁和/或硅杂质含量的方法包括将铁离子和任选的可溶性氟化物加入到具有至少9的pH的六水氯化氨水溶液中。不溶性 通过过滤从溶液中除去氟化镁，氟化钙和/或氢氧化铁和硅共沉淀物的化合物。

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