公开(公告)号：US20240270932A1

公开(公告)日：2024-08-15

申请号：US18643873

申请日：2024-04-23

Applicant: NICHIA CORPORATION

Inventor： Hideki YOSHIDA ,  Hirofumi OOGURI ,  Yuji AKAZAWA

IPC: C08K3/34 ,  C01B33/24 ,  C08K7/10

CPC classification number: C08K3/34 ,  C01B33/24 ,  C08K7/10

Abstract: A method of producing a modified fibrous wollastonite is provided. The method includes hydrothermally treating a fibrous wollastonite.

公开(公告)号：US20170183566A1

公开(公告)日：2017-06-29

申请号：US15389628

申请日：2016-12-23

Applicant: NICHIA CORPORATION

Inventor： Hirofumi OOGURI

IPC: C09K11/77

CPC classification number: C09K11/7731

Abstract: A method of producing a thiogallate-based fluorescent material having a large particle diameter and an enhanced luminance, and a sulfite for a thiogallate-based fluorescent material are provided. The method of producing a thiogallate-based fluorescent material includes preparing a first solution containing at least one element M1 selected from the group consisting of strontium, beryllium, magnesium, calcium, barium and zinc, and at least one element M2 selected from the group consisting of europium and cerium, and a second solution containing a sulfite; simultaneously supplying the first solution and the second solution to a reaction vessel and causing a reaction in a reaction system to obtain a powder of a sulfite containing M1 and M2; and obtaining the thiogallate-based fluorescent material from the resulting powder of a sulfite containing M1 and M2.

公开(公告)号：US20220106523A1

公开(公告)日：2022-04-07

申请号：US17643883

申请日：2021-12-13

Applicant: NICHIA CORPORATION

Inventor： Hirofumi OOGURI ,  Shoji HOSOKAWA

IPC: C09K11/77 ,  C09K11/08 ,  H01L33/50

Abstract: Provided are a method for producing a ceramic sintered body having improved light emission intensity, a ceramic sintered body, and a light emitting device. The method for producing a ceramic sintered body comprises preparing a molded body that contains a nitride fluorescent material having a composition containing: at least one alkaline earth metal element M1 selected from the group consisting of Ba, Sr, Ca, and Mg; at least one metal element M2 selected from the group consisting of Eu, Ce, Tb, and Mn; Si; and N, wherein a total molar ratio of the alkaline earth metal element M1 and the metal element M2 in 1 mol of the composition is 2, a molar ratio of the metal element M2 is a product of 2 and a parameter y and wherein y is in a range of 0.001 or more and less than 0.5, a molar ratio of Si is 5, and a molar ratio of N is 8, and wherein the nitride fluorescent material has a crystallite size, as calculated by X-ray diffraction measurement using the Halder-Wagner method, of 550 Å or less, and calcining the molded body at a temperature in a range of 1,600° C. or more and 2,200° C. or less to obtain a sintered body.

公开(公告)号：US20180155619A1

公开(公告)日：2018-06-07

申请号：US15827503

申请日：2017-11-30

Applicant: NICHIA CORPORATION

Inventor： Hirofumi OOGURI

IPC: C09K11/77 ,  H01L33/26 ,  H01L33/50 ,  H01J61/44

CPC classification number: C09K11/7731 ,  C09K2211/181 ,  C09K2211/182 ,  C09K2211/188 ,  H01J61/44 ,  H01L33/26 ,  H01L33/502

Abstract: Provided are a method of producing a thiogallate-based fluorescent material, a method of producing a light-emitting device, a thiogallate-based fluorescent material, and a light-emitting device. The method of producing a thiogallate-based fluorescent material includes preparing a first solution containing at least one M1 ion selected from the group consisting of Sr, Be, Mg, Ca, Ba and Zn, and at least one M2 ion selected from the group consisting of Eu and Ce, and a second solution containing a sulfite ion, simultaneously supplying the first solution and the second solution to a reactor to obtain a powder containing a sulfite that contains an element M1 and an element M2, mixing a raw material that contains the powder containing the sulfite that contains the element M1 and the element M2 and a powder containing a gallium compound, with lithium chloride to obtain a mixture, and heat-treating the mixture to obtain a thiogallate-based fluorescent material.

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：US20180340051A1

公开(公告)日：2018-11-29

申请号：US15989112

申请日：2018-05-24

Applicant: NICHIA CORPORATION

Inventor： Hideki YOSHIDA ,  Hirofumi OOGURI ,  Yuji AKAZAWA

IPC: C08K3/34 ,  C01B33/24

Abstract: A method of producing a modified fibrous wollastonite is provided. The method includes hydrothermally treating a fibrous wollastonite.

公开(公告)号：US20200172804A1

公开(公告)日：2020-06-04

申请号：US16695702

申请日：2019-11-26

Applicant: NICHIA CORPORATION

Inventor： Hirofumi OOGURI ,  Shoji HOSOKAWA

IPC: C09K11/77 ,  C09K11/08 ,  H01L33/50

Abstract: Provided are a method for producing a ceramic sintered body having improved light emission intensity, a ceramic sintered body, and a light emitting device. The method for producing a ceramic sintered body comprises preparing a molded body that contains a nitride fluorescent material having a composition containing: at least one alkaline earth metal element M1 selected from the group consisting of Ba, Sr, Ca, and Mg; at least one metal element M2 selected from the group consisting of Eu, Ce, Tb, and Mn; Si; and N, wherein a total molar ratio of the alkaline earth metal element M1 and the metal element M2 in 1 mol of the composition is 2, a molar ratio of the metal element M2 is a product of 2 and a parameter y and wherein y is in a range of 0.001 or more and less than 0.5, a molar ratio of Si is 5, and a molar ratio of N is 8, and wherein the nitride fluorescent material has a crystallite size, as calculated by X-ray diffraction measurement using the Halder-Wagner method, of 550 Å or less, and calcining the molded body at a temperature in a range of 1,600° C. or more and 2,200° C. or less to obtain a sintered body.

公开(公告)号：US20160289555A1

公开(公告)日：2016-10-06

申请号：US15083576

申请日：2016-03-29

Applicant: NICHIA CORPORATION

Inventor： Tsunehito NIIMI ,  Koji KAJIKAWA ,  Hirofumi OOGURI

IPC: C09K11/77 ,  H01L33/50 ,  B01J2/16 ,  C09K11/02

Abstract: A fluorescent material particle including: a particle that contains a thiogallate phosphor and a first adherent member containing boron oxide and being disposed on the surface of the particle, a method for producing the fluorescent material particles, and a light emitting device are provided.

Abstract translation: 一种荧光材料颗粒，包括：含有硫代镓酸盐荧光体的颗粒和含有氧化硼并且设置在颗粒表面上的第一粘附构件，荧光材料颗粒的制造方法和发光装置。