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    Light wavelength conversion member and light emitting device
    2.
    发明授权
    Light wavelength conversion member and light emitting device 有权

    公开(公告)号：US10910524B2

    公开(公告)日：2021-02-02

    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 ,  H01L33/48 ,  C04B35/50 ,  C04B35/44 ,  C04B35/64 ,  C09K11/77 ,  C09K11/08 ,  G02B5/20

    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.

    Light wavelength conversion member and light emission device
    3.
    发明授权
    Light wavelength conversion member and light emission device 有权

    公开(公告)号：US10665761B2

    公开(公告)日：2020-05-26

    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 ,  C09K11/77 ,  C04B35/115 ,  C04B35/117 ,  C04B35/44 ,  G02B5/20

    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.

    Ceramic sintered body
    4.
    发明授权
    Ceramic sintered body 有权

    公开(公告)号：US10766820B2

    公开(公告)日：2020-09-08

    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 ,  C04B35/44 ,  C04B35/626 ,  C04B35/64 ,  C09K11/77 ,  C04B35/10

    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.

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