公开(公告)号：US20200181487A1

公开(公告)日：2020-06-11

申请号：US16704477

申请日：2019-12-05

Applicant: NICHIA CORPORATION

Inventor： Masaki KONDO ,  Shozo TAKETOMI ,  Takafumi SUMIE ,  Seigo SUNAGAWA ,  Hirofumi Ooguri

IPC: C09K11/77 ,  C01F17/34 ,  G03B21/20

Abstract: A ceramic complex that has improved optical characteristics including luminous efficiency is provided. A method for producing a ceramic complex, including: preparing a molded body containing rare earth aluminum garnet fluorescent material, aluminum oxide, and lutetium oxide, and having a content of the rare earth aluminum garnet fluorescent material in a range of 15% by mass or more and 50% by mass or less, and a content of the lutetium oxide in a range of 0.2% by mass or more and 4.5% by mass or less, based on the total amount of the rare earth aluminum garnet fluorescent material, the aluminum oxide, and the lutetium oxide; and calcining the molded body in an air atmosphere to provide a ceramic complex having a relative density in a range of 90% or more and less than 100%.

公开(公告)号：US20190309223A1

公开(公告)日：2019-10-10

申请号：US16374244

申请日：2019-04-03

Applicant: NICHIA CORPORATION

Inventor： Seigo SUNAGAWA ,  Shozo TAKETOMI ,  Yasuaki MASHIMA ,  Takafumi SUMIE

IPC: C09K11/77 ,  C09K11/02 ,  C04B35/117 ,  C04B35/64 ,  G03B21/20

Abstract: Provided are a ceramic complex capable of improving the luminous efficiency, a projector comprising a ceramic complex, and a method for producing a ceramic complex. Proposed is a ceramic complex including a rare earth aluminate fluorescent material having an average particle diameter in a range of 15 m or more and 40 μm or less, aluminum oxide having a purity of aluminum oxide of 99.0% by mass or more, and voids, wherein the content of the rare earth aluminate fluorescent material is in a range of 15% by mass or more and 50% by mass or less relative to a total amount of the rare earth aluminate fluorescent material and the aluminum oxide, and a void fraction is in a range of 1% or more and 10% or less.

公开(公告)号：US20240132408A1

公开(公告)日：2024-04-25

申请号：US18401228

申请日：2023-12-29

Applicant: NICHIA CORPORATION

Inventor： Shozo TAKETOMI ,  Ryo YAMAMOTO ,  Tomomi FUJII ,  Toshiyuki HIRAI

IPC: C04B35/44 ,  C04B38/00 ,  C09K11/77

CPC classification number: C04B35/44 ,  C04B38/0054 ,  C09K11/7706 ,  C04B2235/5463 ,  C04B2235/74 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/80

Abstract: A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 μm to 1.3 μm, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 μm to 1.2 μm.

公开(公告)号：US20190330526A1

公开(公告)日：2019-10-31

申请号：US16508974

申请日：2019-07-11

Applicant: NICHIA CORPORATION

Inventor： Shozo TAKETOMI ,  Shoji HOSOKAWA ,  Tomokazu YOSHIDA ,  Kazuya NISHIMATA

IPC: C09K11/64 ,  H01L33/50

Abstract: Provided are a method of producing an aluminate fluorescent material, an aluminate fluorescent material and a light emitting device. The production method includes heat-treating a mixture prepared by mixing a compound containing at least one alkaline earth metal element selected from the group consisting of Ba, Sr and Ca, a Mg-containing compound not acting as a flux, a Mn-containing compound, an Al-containing compound, a first flux containing at least one alkali metal element selected from the group consisting of Na, K, Rb and Cs, and a Mg-containing second flux to give an aluminate fluorescent material.

公开(公告)号：US20240228382A9

公开(公告)日：2024-07-11

申请号：US18401228

申请日：2023-12-29

Applicant: NICHIA CORPORATION

Inventor： Shozo TAKETOMI ,  Ryo YAMAMOTO ,  Tomomi FUJII ,  Toshiyuki HIRAI

IPC: C04B35/44 ,  C04B38/00 ,  C09K11/77

CPC classification number: C04B35/44 ,  C04B38/0054 ,  C09K11/7706 ,  C04B2235/5463 ,  C04B2235/74 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/80

Abstract: A rare earth aluminate sintered compact including rare earth aluminate phosphor crystalline phases and voids, wherein an absolute maximum length of 90% or more by number of rare earth aluminate phosphor crystalline phases is in a range from 0.4 μm to 1.3 μm, and an absolute maximum length of 90% or more by number of voids is in a range from 0.1 μm to 1.2 μm.

公开(公告)号：US20240158694A1

公开(公告)日：2024-05-16

申请号：US18420283

申请日：2024-01-23

Applicant: NICHIA CORPORATION

Inventor： Masaki KONDO ,  Shozo TAKETOMI ,  Hirofumi OGURI

IPC: C09K11/77 ,  B22F1/142 ,  B22F7/00 ,  C01F17/34 ,  C04B35/117 ,  C04B35/44 ,  C04B35/64 ,  C09K11/02 ,  G03B21/20 ,  H01L33/50

CPC classification number: C09K11/7774 ,  B22F1/142 ,  B22F7/008 ,  C01F17/34 ,  C04B35/117 ,  C04B35/44 ,  C04B35/64 ,  C09K11/02 ,  G03B21/204 ,  H01L33/502 ,  B22F2302/25 ,  C09K11/0838

Abstract: A method for producing a rare earth aluminate sintered body includes: preparing a molded body by mixing a fluorescent material having a composition of a rare earth aluminate and a raw material mixture comprising an oxide containing at least one rare earth element Ln selected from the group consisting of Y, La, Lu, Gd, and Tb, an oxide containing Ce, an oxide containing Al, and optionally an oxide containing at least one element M′ selected from the group consisting of Ga and Sc; and calcining the molded body to obtain a sintered body.

公开(公告)号：US20230348331A1

公开(公告)日：2023-11-02

申请号：US18310949

申请日：2023-05-02

Applicant: NICHIA CORPORATION

Inventor： Ryo YAMAMOTO ,  Shozo TAKETOMI

IPC: C04B35/44

CPC classification number: C04B35/44 ,  C04B2235/3224 ,  C04B2235/3217

Abstract: A rare earth aluminate sintered body includes crystal agglomerated particles containing a rare earth aluminate fluorescent material crystal phase, and a rare earth aluminate crystal phase having a refractive index different from that of the rare earth aluminate fluorescent material crystal phase, wherein the rare earth aluminate crystal phase is arranged around the crystal agglomerated particles.

公开(公告)号：US20240286189A1

公开(公告)日：2024-08-29

申请号：US18590845

申请日：2024-02-28

Applicant: NICHIA CORPORATION

Inventor： Ryo YAMAMOTO ,  Shozo TAKETOMI

IPC: B22F1/12 ,  B22F3/10

CPC classification number: B22F1/12 ,  B22F3/10 ,  B22F2301/052 ,  B22F2301/30 ,  B22F2301/45

Abstract: A method for producing a sintered body includes: providing a raw material mixture containing oxide particles containing Ce, Al, Ga, optionally Sc, and a rare earth element R1 being at least one selected from the group consisting of Y, La, Gd, and Tb to obtain a target composition, wherein a total molar ratio of R1 and Ce is 3, and a molar ratio of Ce, a total molar ratio of Al, Ga, and Sc, a molar ratio of Al and a molar ratio of the Ga are as described in the disclosure; molding the raw material mixture to obtain a molded body; and calcining the molded body to obtain a sintered body containing a rare earth aluminate crystal phase and 2.7% by volume or more to 57.0% by volume or less of an aluminum oxide phase.

公开(公告)号：US20240076542A1

公开(公告)日：2024-03-07

申请号：US18454933

申请日：2023-08-24

Applicant: NICHIA CORPORATION

Inventor： Ryo YAMAMOTO ,  Shozo TAKETOMI

IPC: C09K11/02 ,  C04B35/117 ,  C04B35/626 ,  C04B35/64 ,  C09K11/77

CPC classification number: C09K11/02 ,  C04B35/117 ,  C04B35/62655 ,  C04B35/64 ,  C09K11/7774 ,  C04B2235/3222 ,  C04B2235/5409 ,  C04B2235/5436 ,  C04B2235/656 ,  C04B2235/85 ,  C04B2235/9646

Abstract: A sintered body includes an aluminum oxide phase and crystal agglomerated particles containing a rare earth aluminate fluorescent material crystal phase, wherein the aluminum oxide phase is disposed around the crystal agglomerated particles. A method for producing a sintered body includes: providing a first mixture obtained by wet mixing raw materials and then drying; dry mixing the first mixture and aluminum oxide particles; molding a mixture obtained by dry mixing the first raw material mixture and the aluminum oxide particles; and calcining a molded body obtained by molding the mixture.

公开(公告)号：US20200324342A1

公开(公告)日：2020-10-15

申请号：US16845807

申请日：2020-04-10

Applicant: NICHIA CORPORATION

Inventor： Masaki KONDO ,  Shozo TAKETOMI ,  Hirofumi OGURI

IPC: B22F7/00 ,  B22F1/00

Abstract: A method for producing a rare earth aluminate sintered body includes: preparing a molded body by mixing a fluorescent material having a composition of a rare earth aluminate and a raw material mixture comprising an oxide containing at least one rare earth element Ln selected from the group consisting of Y, La, Lu, Gd, and Tb, an oxide containing Ce, an oxide containing Al, and optionally an oxide containing at least one element M1 selected from the group consisting of Ga and Sc; and calcining the molded body to obtain a sintered body.