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公开(公告)号：US12163032B2
公开(公告)日：2024-12-10
申请号：US16954853
申请日：2018-12-06
Applicant: NISSHIN ENGINEERING INC.
Inventor： Shu Watanabe , Naohito Uemura , Keitaroh Nakamura
Abstract: Provided are composite particles having the optical characteristic of a lower transmittance in the visible light region, i.e., a higher light-blocking performance in the visible light region, and a method for producing composite particles. The composite particles have at least one of Al and Ti formed into a composite with ZrN.
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公开(公告)号：US10020108B2
公开(公告)日：2018-07-10
申请号：US14764442
申请日：2014-01-22
Applicant: NISSHIN SEIFUN GROUP INC. , NISSHIN ENGINEERING INC.
Inventor： Keitaroh Nakamura , Akihiro Kinoshita , Naohito Uemura
CPC classification number: H01F27/255 , B22F1/02 , C22C38/00 , C22C2202/02 , H01F1/061 , H01F5/00 , H01F41/0206 , H01F41/0246
Abstract: This method for producing magnetic particles comprises a nitriding treatment step for applying a nitriding treatment to material particles each having a core-shell structure in which an aluminum oxide layer is formed on the surface of an iron microparticle, and nitriding the iron microparticles while maintaining the core-shell structure.
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3.发明授权公开(公告)号：US10128031B2
公开(公告)日：2018-11-13
申请号：US15116103
申请日：2015-01-20
Applicant: NISSHIN SEIFUN GROUP INC. , NISSHIN ENGINEERING INC.
Inventor： Keitaroh Nakamura , Akihiro Kinoshita , Naohito Uemura
Abstract: Provided is a method for manufacturing magnetic particles, in which an oxidation treatment, a reduction treatment, and a nitriding treatment are performed in that order on raw material particles with a core-shell structure in which a silicon oxide layer is formed on the surfaces of iron microparticles, thereby nitriding the iron microparticles while maintaining the core-shell structure. Due to this configuration, granular magnetic particles with a core-shell structure in which a silicon oxide layer is formed on the surfaces of iron nitride microparticles can be obtained.
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