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公开(公告)号：US20230383183A1
公开(公告)日：2023-11-30
申请号：US18324113
申请日：2023-05-25
Applicant: NICHIA CORPORATION
Inventor： Ryuta MIYAI , Kohei KUNIMOTO , Masato YOSHIDA , Kazuya NISHIMATA
CPC classification number: C09K11/7739 , C01B25/10 , H01L33/502 , C01P2006/60 , C01P2002/72 , C01P2002/50
Abstract: The halophosphate phosphor includes a halophosphate including an alkaline earth metal including at least calcium; europium; and a halogen including at least chlorine. An elution amount of chlorine ions after the halophosphate phosphor is brought into contact with 10 times by mass of pure water at 85° C. for five hours is 7 ppm or less.
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公开(公告)号：US20210371975A1
公开(公告)日：2021-12-02
申请号：US17303476
申请日：2021-05-28
Applicant: NICHIA CORPORATION
Inventor： Ryuta MIYAI , Kazuya NISHIMATA , Shoji HOSOKAWA
IPC: C23C16/442 , C23C16/40 , C09K11/02 , C09K11/08 , C23C16/56
Abstract: A method of producing a silicate fluorescent material, the method includes: providing a raw material mixture that contains an M source containing M, an Mg source, an Eu source, and an Si source, and optionally an Mn source, obtaining at least one core particle comprising a silicate fluorescent composition having a formula: (M1-cEuc)3a(Mg1-dMnd)bSi2O8, in which M is at least one element selected from the group consisting of Ca, Sr, and Ba, and a, b, c, and d are numbers respectively satisfying 0.93≤a≤1.07, 0.90≤b≤1.10, 0.016≤c≤0.090, and 0≤d≤0.22; using a chemical vapor deposition method, depositing aluminum oxide on surfaces of the at least one core particle; and heat treating at a temperature in a range of 210° C. to 490° C. in an oxygen-containing atmosphere.
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3.发明公开公开(公告)号：US20230332043A1
公开(公告)日：2023-10-19
申请号：US18341365
申请日：2023-06-26
Applicant: NICHIA CORPORATION
Inventor： Ryuta MIYAI , Kazuya NISHIMATA , Shoji HOSOKAWA
CPC classification number: C09K11/617 , H01L33/26
Abstract: Provided are a chlorosilicate fluorescent material having high light emission efficiency, a method for producing the same, and a light emitting device. In certain embodiments, the chlorosilicate fluorescent material has a chemical composition comprising Ca, Eu, Mg, Si, O, and Cl, wherein when a molar ratio of Si in 1 mol of the chemical composition is set as 4, the chlorosilicate fluorescent material comprises Ca in a molar ratio range of 7.0 or more and 7.94 or less, Eu in a molar ratio range of 0.01 or more and 1.0 or less, Ca and Eu in a total molar ratio range of 7.70 or more and 7.95 or less, Mg in a molar ratio range of 0.9 or more and 1.1 or less, and Cl in a molar ratio range of more than 1.90 and 2.00 or less.
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公开(公告)号：US20190300785A1
公开(公告)日：2019-10-03
申请号：US16368984
申请日：2019-03-29
Applicant: NICHIA CORPORATION
Inventor： Ryuta MIYAI , Kazuya NISHIMATA , Shoji HOSOKAWA
Abstract: A method for producing a γ-AlON fluorescent material, comprising: preparing a first mixture containing a compound containing Mn, a compound containing Li, a compound containing Mg, an aluminum oxide, and an aluminum nitride, in which the amount of fluorine is 150 ppm by mass or less relative to the total amount of the first mixture excluding fluorine, and subjecting the first mixture to a first heat treatment to obtain a first calcined product having an average particle diameter D1, as measured according to a Fisher Sub-Sieve Sizer method, of 10.0 μm or more; and preparing a second mixture containing the first calcined product, a compound containing Mn, a compound containing Li, a compound containing Mg, an aluminum oxide, and an aluminum nitride, in which the amount of fluorine is 150 ppm by mass or less relative to the total amount of the second mixture excluding fluorine, and subjecting the second mixture to a second heat treatment to obtain a second calcined product having an average particle diameter D2, as measured according to the Fisher Sub-Sieve Sizer method, of 16.0 μm or more, wherein the second mixture contains the first calcined product in an amount of more than 20% by mass and 82% by mass or less.
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