公开(公告)号：US20210324266A1

公开(公告)日：2021-10-21

申请号：US16973367

申请日：2019-07-17

Applicant: NGK SPARK PLUG CO., LTD.

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

IPC: C09K11/77 ,  H01L33/50 ,  C09K11/02 ,  C04B35/10

Abstract: In one aspect of the present disclosure, there is provided an optical wavelength conversion member including a polycrystalline ceramic sintered body containing, as main components, Al2O3 crystal grains and crystal grains represented by formula X3Al5O12:Ce. In the optical wavelength conversion member 9, atoms of element X are present also in an Al2O3 crystal grain adjacent to the interface between the Al2O3 crystal grain and an X3Al5O12:Ce crystal grain.

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

公开(公告)号：US20190241475A1

公开(公告)日：2019-08-08

申请号：US16331655

申请日：2017-09-20

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Yusuke KATSU ,  Toshiaki KURAHASHI ,  Hideto YAMADA ,  Takeshi MITSUOKA

IPC: C04B35/117 ,  B23K20/12 ,  B23B27/14

CPC classification number: C04B35/117 ,  B23B27/14 ,  B23B27/148 ,  B23B2224/00 ,  B23K20/12 ,  B23K20/122 ,  C04B35/645 ,  C04B2235/3217 ,  C04B2235/3847 ,  C04B2235/40 ,  C04B2235/5445

Abstract: An object of the present disclosure is to improve the properties of a ceramic composition. A ceramic composition contains alumina (Al2O3) and tungsten carbide (WC) and is characterized in that an atomic layer formed of at least one element selected from among transition metals belonging to Groups 4 to 6 of the periodic table, yttrium (Y), scandium (Sc), and lanthanoids is present at a crystal grain boundary between an alumina (Al2O3) crystal grain and a tungsten carbide (WC) crystal grain.

公开(公告)号：US20210098657A1

公开(公告)日：2021-04-01

申请号：US17058340

申请日：2019-05-10

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Tsuneyuki ITO ,  Shohei TAKAKU ,  Yuki SHIMURA ,  Shinji BAN ,  Yusuke KATSU

IPC: H01L33/50 ,  C04B35/80 ,  C04B35/115 ,  H01L33/64

Abstract: An optical wavelength conversion member according to one aspect of the present disclosure includes a ceramic sintered body, wherein the ceramic sintered body has a fluorescent phase containing, as a main. component, fluorescent crystal grains that generate fluorescence in response to incident light, and a translucent phase containing translucent crystal grains as a main component. The optical wavelength conversion member includes a metal layer having light reflectivity and provided on a side of the ceramic sintered body opposite the side on which the light is incident, and a dielectric multilayer film including dielectric layers having different optical refractive indices and provided between the ceramic sintered body and the metal layer.

公开(公告)号：US20200303597A1

公开(公告)日：2020-09-24

申请号：US16651434

申请日：2018-09-10

Applicant: NGK SPARK PLUG CO., LTD.

Inventor： Syohei TAKAKU ,  Yusuke KATSU ,  Tsuneyuki ITO ,  Yuki SHIMURA ,  Shinji BAN ,  Takeshi MITSUOKA

IPC: H01L33/50 ,  F21V7/30 ,  F21V29/502 ,  F21V13/08 ,  F21V9/32 ,  C04B35/117

Abstract: An optical wavelength converter (1) is configured such that an optical wavelength conversion member (9) is bonded to a heat dissipation member (13) having superior heat dissipation property. Thus, heat generated by light incident on the optical wavelength conversion member (9) can be efficiently dissipated. Therefore, even when high-energy light is incident on the optical wavelength converter, temperature quenching is less likely to occur, and thus high fluorescence intensity can be maintained. An intermediate film (21) is disposed between a reflective film (19) and a bonding portion (15). The presence of the intermediate film (21) improves the adhesion between the reflective film (19) and the bonding portion (15), thereby enhancing the heat dissipation from the optical wavelength conversion member (9) to the heat dissipation member (13). Thus, the temperature quenching of the optical wavelength conversion member (9) can be prevented, thereby enhancing fluorescence intensity.

公开(公告)号：US20190245119A1

公开(公告)日：2019-08-08

申请号：US16343188

申请日：2017-10-24

Applicant: NGK SPARK PLUG CO., LTD.

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

IPC: H01L33/50 ,  H01L33/48 ,  B32B7/027 ,  B32B15/04 ,  C09K11/77 ,  C09K11/02 ,  C04B35/117 ,  C04B35/44 ,  C04B35/645

CPC classification number: H01L33/502 ,  B32B7/027 ,  B32B15/04 ,  B32B2307/302 ,  C04B35/117 ,  C04B35/44 ,  C04B35/50 ,  C04B35/645 ,  C04B2235/3217 ,  C04B2235/3222 ,  C04B2235/6585 ,  C09K11/02 ,  C09K11/08 ,  C09K11/7774 ,  G02B5/20 ,  H01L33/483 ,  H01L33/50 ,  H01L33/505 ,  H01L2933/0041

Abstract: A method for producing an optical wavelength conversion member (9) composed of a sintered body containing, as main components, Al2O3 and a component represented by formula A3B5O12:Ce; an optical wavelength conversion member; an optical wavelength conversion component including the optical wavelength conversion member; and a light-emitting device including the optical wavelength conversion member or the optical wavelength conversion component. The production method of the sintered body includes firing in a firing atmosphere having a pressure of 104 Pa or more and an oxygen concentration of 0.8 vol. % or more and less than 25 vol. %.