公开(公告)号：US11319486B2

公开(公告)日：2022-05-03

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 ,  C04B35/117 ,  C04B35/44 ,  C04B35/64 ,  C04B35/50

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：US11220632B2

公开(公告)日：2022-01-11

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 ,  C04B35/117 ,  C04B35/64 ,  C09K11/02 ,  G03B21/20 ,  C04B35/44 ,  C04B35/115 ,  H05B33/14 ,  C04B38/00 ,  C04B111/80 ,  H01S5/00

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 μm 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.