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    OPTICAL WAVELENGTH CONVERSION DEVICE
    2.
    发明申请
    OPTICAL WAVELENGTH CONVERSION DEVICE 有权

    公开(公告)号：US20210018160A1

    公开(公告)日：2021-01-21

    申请号：US16968693

    申请日：2018-10-31

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Shohei TAKAKU ,  Yosuke YATSUYA ,  Yusuke KATSU ,  Tomoo TANAKA

    IPC: F21V7/30 ,  F21V29/70

    Abstract: Provided is an optical wavelength conversion device in which heat of an optical wavelength conversion member can be dissipated efficiently while the joint strength between the optical wavelength conversion member and a heat dissipation member is maintained. In the present disclosure, the optical wavelength conversion device includes an optical wavelength conversion member configured to convert the wavelength of incident light; a heat dissipation member which is more excellent in heat dissipation than the optical wavelength conversion member; and a joint portion which joins the optical wavelength conversion member and the heat dissipation member together. The optical wavelength conversion member includes a plate-shaped ceramic fluorescent body and a reflecting film disposed on a heat dissipation member-side surface of the ceramic fluorescent body. The joint portion has a thermal conductivity of 120 W/mK or more. The joint portion has a melting point of 240° C. or higher.

    LIGHT WAVELENGTH CONVERSION MEMBER AND LIGHT EMITTING DEVICE
    3.
    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.

    CERAMIC SINTERED BODY
    5.
    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
    6.
    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.

    OPTICAL WAVELENGTH CONVERSION MEMBER AND LIGHT-EMITTING DEVICE
    8.
    发明申请
    OPTICAL WAVELENGTH CONVERSION MEMBER AND LIGHT-EMITTING DEVICE 有权

    公开(公告)号：US20210246367A1

    公开(公告)日：2021-08-12

    申请号：US16973322

    申请日：2019-07-01

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Shohei TAKAKU ,  Yusuke KATSU ,  Tsuneyuki ITO ,  Toshiaki KURAHASHI ,  Hideto YAMADA

    IPC: C09K11/02 ,  F21V9/30 ,  C09K11/77 ,  C04B35/117

    Abstract: One aspect of the disclosure provides an optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula (Y,A)3B5O12:Ce. In the optical wavelength conversion member, a (Y,A)3B5O12:Ce crystal grain has a region wherein the A concentration of a peripheral portion of the (Y,A)3B5O12:Ce crystal grain is higher than that of an interior portion of the (Y,A)3B5O12:Ce crystal grain. Thus, the optical wavelength conversion member exhibits high fluorescence intensity (i.e., high emission intensity) and high heat resistance (i.e., low likelihood of temperature quenching). The optical wavelength conversion member has a structure wherein the element A concentration of a peripheral portion of a (Y,A)3B5O12:Ce crystal grain differs from that in an interior portion of the crystal grain. This structure can achieve a ceramic fluorescent body exhibiting superior fluorescent characteristics and superior thermal characteristics with varied colors of emitted light.

    CERAMIC SINTERED BODY, INSERT, CUTTING TOOL, AND FRICTION STIR WELDING TOOL
    9.
    发明申请
    CERAMIC SINTERED BODY, INSERT, CUTTING TOOL, AND FRICTION STIR WELDING TOOL 审中-公开

    公开(公告)号：US20200223758A1

    公开(公告)日：2020-07-16

    申请号：US16639056

    申请日：2018-09-18

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Yoshito KOJIMA ,  Hiroshi YONEKURA ,  Yusuke KATSU ,  Takeshi MITSUOKA

    IPC: C04B35/56 ,  B23B27/14 ,  C04B41/50

    Abstract: Provided is a ceramic sintered body having high wear resistance and chipping resistance. Also provided are an insert, a cutting tool and a friction stir welding tool, each of which uses such a high-performance ceramic sintered body. The ceramic sintered body includes Al2O3 (alumina), WC (tungsten carbide) and ZrO2 (zirconia), wherein Zr (zirconium) element is present at either one or both of: (1) a grain boundary between crystal grains of the Al2O3; and (2) a grain boundary of crystal grains of the Al2O and crystal grains of the WC, wherein the ceramic sintered body contains 55.0 to 97.5 vol % of the WC, 0.1 to 18.0 vol % of the ZrO2, and the balance being the Al2O3, and wherein the ZrO2 is in a phase of tetragonal structure (T) or a mixed phase of tetragonal structure (T) and monoclinic structure (M).

    WAVELENGTH CONVERSION MEMBER FOR SOLDERING, WAVELENGTH CONVERSION DEVICE, AND LIGHT SOURCE DEVICE
    10.
    发明申请
    WAVELENGTH CONVERSION MEMBER FOR SOLDERING, WAVELENGTH CONVERSION DEVICE, AND LIGHT SOURCE DEVICE 有权

    公开(公告)号：US20220347781A1

    公开(公告)日：2022-11-03

    申请号：US17624001

    申请日：2020-07-09

    Applicant: NGK SPARK PLUG CO., LTD.

    Inventor： Yosuke YATSUYA ,  Ryuichi ARAKAWA ,  Toshiyuki SAKURAI ,  Tsuneyuki ITO ,  Hiroki TAKEUCHI ,  Tomoo TANAKA ,  Yusuke KATSU

    IPC: B23K3/08

    Abstract: A wavelength conversion member for soldering includes a ceramic fluorescent body for converting a wavelength of light entering from an incident surface of the ceramic fluorescent body, a reflection layer disposed on a back surface of the ceramic fluorescent body on a side opposite the incident surface and partially or entirely covering the back surface, and a junction layer composed of one or more films and covering at least the reflection layer selected from the back surface of the ceramic fluorescent body and the reflection layer. The junction layer has a projecting portion which projects, in relation to an outer circumferential portion of the junction layer, in a center portion of a surface on a side opposite a surface on a side where the junction layer covers at least the reflection layer selected from the back surface and the reflection layer.

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