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    Method for manufacturing wavelength conversion member
    1.
    发明授权
    Method for manufacturing wavelength conversion member 有权

    公开(公告)号：US10947448B2

    公开(公告)日：2021-03-16

    申请号：US15906612

    申请日：2018-02-27

    Applicant: NICHIA CORPORATION

    Inventor： Tadayoshi Yanagihara ,  Naoto Fujioka ,  Keisuke Suzuki

    IPC: C09K11/02 ,  C04B35/117 ,  C04B35/645 ,  F21V9/30 ,  C09K11/77 ,  C04B35/44 ,  C04B35/626

    Abstract: A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body. (Y1-a-bGdaCeb)3Al5O12  (I) wherein a and b satisfy 0≤a≤0.3 and 0

    Method for manufacturing wavelength conversion member
    2.
    发明授权
    Method for manufacturing wavelength conversion member 有权

    公开(公告)号：US11447694B2

    公开(公告)日：2022-09-20

    申请号：US17167763

    申请日：2021-02-04

    Applicant: NICHIA CORPORATION

    Inventor： Tadayoshi Yanagihara ,  Naoto Fujioka ,  Keisuke Suzuki

    IPC: C09K11/02 ,  C04B35/117 ,  C04B35/645 ,  F21V9/30 ,  C09K11/77 ,  C04B35/44 ,  C04B35/626

    Abstract: A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body. (Y1-a-bGdaCeb)3Al5O12  (I) wherein a and b satisfy 0≤a≤0.3 and 0≤b≤0.022.

    Ceramic complex and method for producing the same
    3.
    发明授权
    Ceramic complex and method for producing the same 有权

    公开(公告)号：US11084977B2

    公开(公告)日：2021-08-10

    申请号：US16553263

    申请日：2019-08-28

    Applicant: NICHIA CORPORATION

    Inventor： Naoto Fujioka ,  Tadayoshi Yanagihara ,  Keisuke Suzuki ,  Hiroshi Ogasa

    IPC: C09K11/02 ,  C09K11/77 ,  C04B41/00 ,  C04B35/645 ,  C04B35/117

    Abstract: Provided are a ceramic complex having high light emission intensity and a method for producing the same. Proposed is a ceramic complex, including a rare earth aluminate fluorescent material having a composition represented by the following formula (I) and an aluminum oxide, wherein the content of the aluminum oxide is 70% by mass or more, the content of Na is 7 ppm by mass or less, the content of Si is 5 ppm by mass or less, the content of Fe is 3 ppm by mass or less, and the content of Ga is 5 pm by mass or less, relative to the total amount of the rare earth aluminate fluorescent material having a composition represented by the following formula (I) and the aluminum oxide. (Ln1-aCea)3Al5O12   (I) wherein Ln represents at least one element selected from the group consisting of Y, Gd, Lu, and Tb; and a satisfies 0

    Method for producing wavelength conversion sintered body
    5.
    发明授权
    Method for producing wavelength conversion sintered body 有权

    公开(公告)号：US11486550B2

    公开(公告)日：2022-11-01

    申请号：US16881174

    申请日：2020-05-22

    Applicant: NICHIA CORPORATION

    Inventor： Tomoya Fukui ,  Tadayoshi Yanagihara

    IPC: H01S5/06 ,  F21K9/90 ,  F21K9/64 ,  H01L33/00

    Abstract: Provided is a method for producing a wavelength conversion sintered body that emits light under irradiation of excitation light. The method for producing a wavelength conversion sintered body includes: preparing a molded body obtained by molding a mixture containing an α-SiAlON fluorescent material and aluminum oxide particles and having a content of Ga of 15 ppm by mass or less; and primary calcining the molded body at a temperature in a range of 1,370° C. or more and 1,600° C. or less to obtain a first sintered body.

    Method for producing ceramic composite material, ceramic composite material, and light emitting device
    6.
    发明授权
    Method for producing ceramic composite material, ceramic composite material, and light emitting device 有权

    公开(公告)号：US11149193B2

    公开(公告)日：2021-10-19

    申请号：US16375476

    申请日：2019-04-04

    Applicant: NICHIA CORPORATION

    Inventor： Hirofumi Ooguri ,  Tomoya Fukui ,  Tadayoshi Yanagihara ,  Shigeki Yoshida

    IPC: C09K11/02 ,  C09K11/77 ,  C09K11/08 ,  C04B35/117 ,  C04B35/593 ,  C04B35/645 ,  H01L33/50

    Abstract: Provided are a method for producing a ceramic composite material that has a high light emission intensity, a ceramic composite material, and a light emitting device. The method for producing a ceramic composite material, includes: preparing a green body containing a nitride fluorescent material having a composition represented by the following chemical formula (I) and aluminum oxide particles mixed with each other; and performing primary sintering the green body at a temperature in a range of 1,250° C. or more and 1,600° C. or less to provide a first sintered body: MwLn1xAyNz  (I) wherein in the chemical formula (I), M represents at least one element selected from the group consisting of Ce and Pr; Ln1 represents at least one element selected from the group consisting of Sc, Y, La, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu; A represents at least one element selected from the group consisting of Si and B; and w, x, y, and z each satisfy 0

    Method for producing fluorescent material, fluorescent material, and light emitting device using the same
    7.
    发明授权
    Method for producing fluorescent material, fluorescent material, and light emitting device using the same 有权

    公开(公告)号：US10414976B2

    公开(公告)日：2019-09-17

    申请号：US15459572

    申请日：2017-03-15

    Applicant: NICHIA CORPORATION

    Inventor： Tadayoshi Yanagihara ,  Kazuya Nishimata ,  Shoji Hosokawa

    IPC: C09K11/77 ,  H01L33/50 ,  H01L33/48

    Abstract: A method of producing a fluorescent material that is capable of providing a light emitting device having excellent durability, a fluorescent material, and a light emitting device are provided. The method of producing the fluorescent material includes: preparing a calcined product having a chlorosilicate composition containing at least one element selected from the group consisting of Ca, Sr, and Ba, at least one element selected from the group consisting of Mg and Zn, at least one element selected from the group consisting of Eu, Ce, Tb, and Mn, Si, O, and Cl; and bringing the calcined product in contact with a fluorine-containing substance and heat-treating the calcined product in an inert gas atmosphere at a temperature in a range of 200° C. or more and 450° C. or less.

    Method of producing nitride fluorescent material, nitride fluorescent material, and light emitting device using the same
    9.
    发明授权
    Method of producing nitride fluorescent material, nitride fluorescent material, and light emitting device using the same 有权

    公开(公告)号：US10217907B2

    公开(公告)日：2019-02-26

    申请号：US15440479

    申请日：2017-02-23

    Applicant: NICHIA CORPORATION

    Inventor： Sadakazu Wakui ,  Tadayoshi Yanagihara ,  Shoji Hosokawa

    IPC: H01L33/50 ,  C09K11/08 ,  C09K11/77

    Abstract: A method of producing a nitride fluorescent material is provided. The nitride fluorescent material undergoes less change in chromaticity under a high-temperature and high-humidity condition and are excellent in durability. The nitride fluorescent material has a composition containing: at least one element selected from the group consisting of Ca, Sr, Ba, and Mg; at least one element selected from the group consisting of Li, Na, and K; at least one element selected from the group consisting of Eu, Ce, Tb, and Mn; Al; and N. The method includes: preparing a calcined product having the composition, bringing the calcined product in contact with a fluorine-containing substance, and heat-treating the calcined product at a temperature of 200° C. or more and 500° C. or less. A light emitting device using the nitride fluorescent material is also provided.

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