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    OPTICAL WAVELENGTH CONVERSION MEMBER AND LIGHT-EMITTING DEVICE
    1.
    发明申请
    OPTICAL WAVELENGTH CONVERSION MEMBER AND LIGHT-EMITTING DEVICE 审中-公开

    公开(公告)号：US20190259918A1

    公开(公告)日：2019-08-22

    申请号：US16342390

    申请日：2017-10-20

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Shohei TAKAKU ,  Yusuke KATSU ,  Tsuneyuki ITO ,  Yuki SHIMURA ,  Takeshi MITSUOKA ,  Jun MOTEKI

    IPC: H01L33/50 ,  C04B35/50

    Abstract: An optical wavelength conversion member and a light-emitting device including the optical wavelength conversion member. The optical wavelength conversion member (9) is formed of a ceramic sintered body having a fluorescent phase containing fluorescent crystal grains as a main component and a translucent phase containing translucent crystal grains as a main component. Crystal grains of the fluorescent phase have a composition represented by formula A3B5O12:Ce, where the element A is selected from Sc, Y, and lanthanoids (except for Ce), and the element B is selected from Al and Ga. In the optical wavelength conversion member (9), 0.3

    CERAMIC SINTERED BODY
    3.
    发明申请
    CERAMIC SINTERED BODY 审中-公开

    公开(公告)号：US20190233333A1

    公开(公告)日：2019-08-01

    申请号：US16312362

    申请日：2017-06-19

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Jun MOTEKI ,  Yusuke KATSU ,  Takeshi MITSUOKA

    IPC: C04B35/117

    Abstract: The durability of a ceramic sintered body is improved, and a reduction in its light emission intensity and the occurrence of a chromaticity variation are suppressed. The ceramic sintered body contains alumina and a compound represented by M13-XM2XM35O12. The volume percent of the compound in the ceramic sintered body is from 3% to 70% inclusive. The ratio of the intensity of XRD from a complex oxide of aluminum and M2 to the intensity of XRD from the compound in the ceramic sintered body is less than 0.05. The average grain diameter of the alumina contained in the ceramic sintered body is from 0.30 (μm) to 3.00 (μm) inclusive. M1 is at least one selected from Sc, Y, and lanthanoid elements, and M2 is at least one selected from lanthanoid elements except any lanthanoid element selected for M1. M3 is at least one of Al and Ga, and X is from 0.003 to 0.500 inclusive.

    LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMISSION DEVICE
    4.
    发明申请
    LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMISSION DEVICE 审中-公开

    公开(公告)号：US20190198726A1

    公开(公告)日：2019-06-27

    申请号：US16328161

    申请日：2017-10-18

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Jun MOTEKI ,  Shohei TAKAKU ,  Yusuke KATSU ,  Takeshi MITSUOKA ,  Tsuneyuki ITO

    IPC: H01L33/50 ,  H01L33/16 ,  C04B35/44 ,  C04B35/115 ,  C04B35/117 ,  C09K11/77

    Abstract: An optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains of a component represented by formula A3B5O12:Ce, wherein A is at least one element selected from Sc, Y and lanthanoids (except for Ce), and B is at least one element selected from Al and Ga. Further, the following relations are satisfied: 0%≤X≤25%, 9%≤Y≤45%, and 48%≤Z≤90%, wherein X represents a proportion corresponding to the ratio a/N, Y represents a proportion corresponding to the ratio b/N, and Z represents a proportion corresponding to the ratio c/N and a, b, c and N are as defined herein. Also disclosed is a light-emitting device including the optical wavelength conversion member.

    LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMITTING DEVICE
    5.
    发明申请
    LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMITTING DEVICE 审中-公开

    公开(公告)号：US20190245118A1

    公开(公告)日：2019-08-08

    申请号：US16342621

    申请日：2017-10-20

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Jun MOTEKI ,  Shohei TAKAKU ,  Yusuke KATSU ,  Takeshi MITSUOKA ,  Tsuneyuki ITO

    IPC: H01L33/50 ,  C09K11/08 ,  G02B5/20

    CPC classification number: H01L33/502 ,  C04B35/50 ,  C04B2235/3222 ,  C09K11/08 ,  G02B5/20 ,  H01L33/50

    Abstract: An optical wavelength conversion member and a light-emitting device including the optical wavelength conversion member. The light-emitting device (1) includes a container (3), a light-emitting element (5), and an optical wavelength conversion member (9). The optical wavelength conversion member (9) is composed of a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains of a component represented by formula A3B5O12:Ce. Specifically, A and B of the A3B5O12 individually represent at least one element selected from the following element groups: A: Sc, Y, and lanthanoids (except for Ce), and B: Al and Ga; the at least one element selected from the element groups is present in each crystal grain and the crystal grain boundary of the ceramic sintered body; and the element concentration of the crystal grain boundary is higher than the element concentration of the crystal grain.

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