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    COATED MANGANESE DOPED PHOSPHORS
    16.
    发明申请
    COATED MANGANESE DOPED PHOSPHORS 审中-公开

    公开(公告)号：US20190048258A1

    公开(公告)日：2019-02-14

    申请号：US15674495

    申请日：2017-08-10

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： Fangming Du ,  Clark David Nelson ,  Sara Anne Krosschell

    IPC: C09K11/66 ,  C09K11/59 ,  C09K11/67

    Abstract: A process for preparing a population of coated phosphor particles is presented. The process includes combining particles of a phosphor of formula I: Ax[MFy]:Mn4+ with a first solution including a compound of formula II: Ax[MFy] to form a suspension, where A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is an absolute value of a charge of the [MFy] ion; and y is 5, 6 or 7. The process further includes combining a second solution including a source A+ ions with the suspension.

    PROCESSES FOR PREPARING COLOR STABLE RED-EMITTING PHOSPHORS
    18.
    发明申请
    PROCESSES FOR PREPARING COLOR STABLE RED-EMITTING PHOSPHORS 审中-公开

    公开(公告)号：US20180002598A1

    公开(公告)日：2018-01-04

    申请号：US15197891

    申请日：2016-06-30

    Applicant: GENERAL ELECTRIC COMPANY

    Inventor： James Edward Murphy ,  Fangming Du ,  Anant Achyut Setlur

    IPC: C09K11/61

    CPC classification number: C09K11/616

    Abstract: Processes for preparing color stable red-emitting phosphors include contacting a complex fluoride phosphor of formula I, AxMFy:Mn4+   I with a first fluorine-containing oxidizing agent in gaseous form at a first temperature ranging from about 200° C. to about 700° C., to form a first product phosphor; contacting the first product phosphor in particulate form with a solution of a compound of formula II in aqueous hydrofluoric acid, AxMFy   II to form a treated phosphor; and contacting the treated phosphor with a second fluorine-containing oxidizing agent in gaseous form at a second temperature of less than 225° C.; wherein A is independently at each occurrence Li, Na, K, Rb, Cs, or a combination thereof; M is independently at each occurrence Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is the absolute value of the charge of the MFy ion; and y is 5, 6 or 7.

    PHOSPHOR MATERIALS FOR LIGHT SOURCES AND METHOD FOR MANUFACTURING THE SAME
    19.
    发明申请
    PHOSPHOR MATERIALS FOR LIGHT SOURCES AND METHOD FOR MANUFACTURING THE SAME 审中-公开

    公开(公告)号：US20170298273A1

    公开(公告)日：2017-10-19

    申请号：US15411250

    申请日：2017-01-20

    Applicant: General Electric Company

    Inventor： Fangming Du ,  William Winder Beers ,  William Erwin Cohen ,  Clark David Nelson

    IPC: C09K11/08

    CPC classification number: C09K11/08 ,  C09K11/617

    Abstract: A method includes mixing a first fluoride phosphor powder that is doped with tetravalent manganese with a treatment solution for a designated period of time, stopping the mixing to allow the fluoride phosphor powder to settle, removing at least some liquid that has separated from the first fluoride phosphor powder, repeating (a) the mixing, (b) the stopping of the mixing, and (c) removing at least some of the liquid during one or more additional cycles, and obtaining a second fluoride phosphor powder following the repeating of the mixing, the stopping of the mixing, and the removing of at least some of the liquid. The second fluoride phosphor powder includes a reduced amount of the manganese relative to the first fluoride phosphor powder.

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