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：US20240083820A1

公开(公告)日：2024-03-14

申请号：US18507047

申请日：2023-11-11

Applicant: NICHIA CORPORATION

Inventor： Toshiyuki HIRAI ,  Keisuke SUZUKI ,  Hirofumi OGURI

IPC: C04B35/10 ,  C04B35/117 ,  C04B35/44 ,  C04B35/64 ,  C04B35/645 ,  C09K11/77

CPC classification number: C04B35/10 ,  C04B35/117 ,  C04B35/44 ,  C04B35/64 ,  C04B35/6455 ,  C09K11/7774 ,  C04B2111/807 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/662 ,  C04B2235/77 ,  C04B2235/963

Abstract: A method for producing a ceramic complex includes: preparing a raw material mixture that contains 5% by mass or more and 40% by mass or less of first rare earth aluminate fluorescent material particles containing an activating element and a first rare earth element different from the activating element, 0.1% by mass or more and 32% by mass or less of oxide particles containing a second rare earth element, and the balance of aluminum oxide particles, relative to 100% by mass of the total amount of the first rare earth aluminate fluorescent material particles, the oxide particles, and the aluminum oxide particles; preparing a molded body of the raw material mixture; and obtaining a sintered body by calcining the molded body in a temperature range of 1,550° C. or higher and 1,800° C. or lower.

公开(公告)号：US20210403382A1

公开(公告)日：2021-12-30

申请号：US17304956

申请日：2021-06-29

Applicant: NICHIA CORPORATION

Inventor： Toshiyuki HIRAI ,  Keisuke SUZUKI ,  Hirofumi OGURI

IPC: C04B35/10 ,  C04B35/64 ,  C04B35/44 ,  C09K11/77

Abstract: A method for producing a ceramic complex includes: preparing a raw material mixture that contains 5% by mass or more and 40% by mass or less of first rare earth aluminate fluorescent material particles containing an activating element and a first rare earth element different from the activating element, 0.1% by mass or more and 32% by mass or less of oxide particles containing a second rare earth element, and the balance of aluminum oxide particles, relative to 100% by mass of the total amount of the first rare earth aluminate fluorescent material particles, the oxide particles, and the aluminum oxide particles; preparing a molded body of the raw material mixture; and obtaining a sintered body by calcining the molded body in a temperature range of 1,550° C. or higher and 1,800° C. or lower.