-
公开(公告)号：US11512250B2
公开(公告)日：2022-11-29
申请号：US17120662
申请日：2020-12-14
Applicant: NICHIA CORPORATION
Inventor： Kenichi Aoyagi , Takashi Kaide , Motoharu Morikawa , Shoji Hosokawa
Abstract: Provided is a method of producing a β-sialon fluorescent material having a high light emission intensity and an excellent light emission luminance. The method includes preparing a calcined product having a composition of β-sialon containing an activating element; grinding the calcined product to obtain a ground product; and heat-treating the ground product to obtain a heat-treated product. A specific surface area of the ground product is 0.2 m2/g or more.
-
公开(公告)号：US11427758B2
公开(公告)日：2022-08-30
申请号：US16504937
申请日：2019-07-08
Applicant: NICHIA CORPORATION
Inventor： Motoharu Morikawa , Shoji Hosokawa , Takashi Kaide , Kenichi Aoyagi
Abstract: A method for producing β-sialon fluorescent material having excellent emission intensity is provided. The method for producing β-sialon fluorescent material includes providing a composition comprising silicon nitride that contains aluminium, an oxygen atom, and europium, heat treating the composition, contacting the heat-treated composition with a basic substance, and washing the composition, which has been contacted with the basic substance, with an acidic liquid medium.
-
公开(公告)号：US10316249B2
公开(公告)日：2019-06-11
申请号：US15165580
申请日：2016-05-26
Applicant: NICHIA CORPORATION
Inventor： Motoharu Morikawa , Kenichi Aoyagi , Takashi Kaide , Shoji Hosokawa
IPC: C09K11/77
Abstract: A method for producing a β-sialon fluorescent material superior in light emitting luminance is provided. The method includes heat-treating a first mixture containing an aluminum compound, a europium compound, and a first silicon oxynitride compound to obtain a first heat-treated product, and heat-treating a second mixture containing the first heat-treated product, an aluminum compound, a europium compound, and a second silicon oxynitride compound, which has a larger oxygen content than the first silicon oxynitride compound, to obtain a second heat-treated product.
-
Patent Agency Ranking
公开(公告)号：US10190044B2
公开(公告)日：2019-01-29
申请号：US15228109
申请日：2016-08-04
Applicant: NICHIA CORPORATION
Inventor： Shoji Hosokawa , Motoharu Morikawa , Tadayoshi Yanagihara , Kenichi Aoyagi , Takashi Kaide
Abstract: A method for producing a β-sialon fluorescent material can be provided. The method includes preparing a composition containing silicon nitride that contains aluminium, an oxygen atom, and europium, heat-treating the composition in a rare gas atmosphere or in a vacuum, and contacting the heat-treated composition with a gas containing elemental fluorine.
-
公开(公告)号：US11560514B2
公开(公告)日：2023-01-24
申请号：US16454917
申请日：2019-06-27
Applicant: NICHIA CORPORATION
Inventor： Motoharu Morikawa , Shoji Hosokawa
IPC: C09K11/77 , C09K11/08 , C04B35/597 , C04B35/626 , C04B35/63
Abstract: Provided is a method for producing a β-sialon fluorescent material, comprising preparing a composition containing a silicon nitride that contains aluminium, oxygen, and europium; heat-treating the composition at a temperature in a range of 1300° C. or more and 1600° C. or less to obtain a heat-treated product; subjecting the heat-treated product to a temperature-decrease of from the heat treatment temperature to 1000° C. as a first temperature-decrease step; and subjecting the heat-treated product to a temperature-decrease of from 1000° C. to 400° C. as a second temperature-decrease step. The first temperature-decrease step has a temperature-decrease rate in a range of 1.5° C./min or more and 200° C./min or less, and the second temperature-decrease step has a temperature-decrease rate in a range of 1° C./min or more and 200° C./min or less.
-
公开(公告)号：US10894917B2
公开(公告)日：2021-01-19
申请号：US15606153
申请日：2017-05-26
Applicant: NICHIA CORPORATION
Inventor： Kenichi Aoyagi , Takashi Kaide , Motoharu Morikawa , Shoji Hosokawa
Abstract: Provided is a method of producing a β-sialon fluorescent material having a high light emission intensity and an excellent light emission luminance. The method includes preparing a calcined product having a composition of β-sialon containing an activating element; grinding the calcined product to obtain a ground product; and heat-treating the ground product to obtain a heat-treated product. A specific surface area of the ground product is 0.2 m2/g or more.
-
公开(公告)号：US10385267B2
公开(公告)日：2019-08-20
申请号：US15378690
申请日：2016-12-14
Applicant: NICHIA CORPORATION
Inventor： Motoharu Morikawa , Shoji Hosokawa
Abstract: A method for producing β-sialon fluorescent material having excellent emission intensity is provided. The method for producing β-sialon fluorescent material includes providing a composition comprising silicon nitride that contains aluminum, an oxygen atom, and europium, heat treating the composition, and contacting the heat-treated composition with a basic substance.
-
公开(公告)号：US10093855B2
公开(公告)日：2018-10-09
申请号：US15172862
申请日：2016-06-03
Applicant: NICHIA CORPORATION
Inventor： Kenichi Aoyagi , Takashi Kaide , Motoharu Morikawa , Shoji Hosokawa
IPC: C09K11/77
Abstract: A method for producing a β-sialon fluorescent material is provided. The method includes heat-treating a mixture containing an aluminum compound, a first europium compound, and silicon nitride to obtain a first heat-treated product; and heat-treating the first heat-treated product with a second europium compound in a rare gas atmosphere to obtain a second heat-treated product.
-
-
-
-
-
-
-
Search Results
8
records
(took 0.011 seconds)
