公开(公告)号：US20200071606A1

公开(公告)日：2020-03-05

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

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. (Lni-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

公开(公告)号：US20210179932A1

公开(公告)日：2021-06-17

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

公开(公告)号：US20170037311A1

公开(公告)日：2017-02-09

申请号：US15228109

申请日：2016-08-04

Applicant: NICHIA CORPORATION

Inventor： Shoji HOSOKAWA ,  Motoharu MORIKAWA ,  Tadayoshi YANAGIHARA ,  Kenichi AOYAGI ,  Takashi KAIDE

IPC: C09K11/77 ,  C09K11/08

CPC classification number: C09K11/7734 ,  C09K11/0883

Abstract: A method for producing a β-sialon fluorescent material can be provided. The method includes preparing a composition containing silicon nitride that contains aluminium, an oxygen atom, and europium, heat-treating the composition in a rare gas atmosphere or in a vacuum, and contacting the heat-treated composition with a gas containing elemental fluorine.

Abstract translation: 可以提供β-赛隆荧光体的制造方法。 该方法包括制备含有铝，氧原子和铕的氮化硅的组合物，在稀有气体气氛或真空中对组合物进行热处理，并使热处理组合物与含有元素氟的气体接触。

公开(公告)号：US20190165220A1

公开(公告)日：2019-05-30

申请号：US16199922

申请日：2018-11-26

Applicant: NICHIA CORPORATION

Inventor： Tomoya FUKUI ,  Tadayoshi YANAGIHARA

IPC: H01L33/50 ,  H01S5/06 ,  C04B35/622 ,  C04B35/505

Abstract: A method for producing a wavelength converting member that emits light under irradiation of excitation light, and a wavelength converting member. The method for producing a wavelength converting member, including: providing a green body prepared by a process comprising molding a mixed powder containing a Ca-α-SiAlON fluorescent material and alumina, and depending on necessity an YAG fluorescent material; and primarily sintering the green body at a temperature in a range of 1,000° C. or more and 1,600° C. or less to obtain a first sintered body.

公开(公告)号：US20170250320A1

公开(公告)日：2017-08-31

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

CPC classification number: H01L33/502 ,  C09K11/0883 ,  C09K11/7734 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H01L2924/181 ,  H01L2924/00014 ,  H01L2924/00012

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.

公开(公告)号：US20200370715A1

公开(公告)日：2020-11-26

申请号：US16881174

申请日：2020-05-22

Applicant: NICHIA CORPORATION

Inventor： Tomoya FUKUI ,  Tadayoshi YANAGIHARA

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

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.

公开(公告)号：US20190309221A1

公开(公告)日：2019-10-10

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

公开(公告)号：US20170275531A1

公开(公告)日：2017-09-28

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

CPC classification number: C09K11/7734 ,  H01L33/486 ,  H01L33/504 ,  H01L2224/48091 ,  H01L2224/48247 ,  H01L2224/48257 ,  H01L2224/73265 ,  H01L2924/181 ,  H01L2924/00014 ,  H01L2924/00012

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.